{ "data": { "a": { "slug": "letta", "name": "Letta", "vendor": "Letta", "vendorUrl": "https://www.letta.com", "kind": "harness", "category": "agent-harnesses", "summary": "Letta, from the MemGPT team, is an open-source agent harness (formerly Letta Code) for stateful agents that keep memory blocks, skills and conversations across sessions, used from a CLI, chat.letta.com, messaging channels or the Agent SDK, with Letta Cloud.", "url": "https://www.anchorterminal.com/tools/letta", "markdownUrl": "https://www.anchorterminal.com/tools/letta.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/letta.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/letta.json", "dns": "letta.grade.anchorterminal.com", "repo": "https://github.com/letta-ai/letta-code", "license": "Apache-2.0", "transports": [ "stdio" ], "packages": [ { "registry": "npm", "name": "@letta-ai/letta-code" }, { "registry": "pypi", "name": "letta" } ], "auth": "mixed", "authNotes": "Local use needs only the user's own model keys or coding-plan logins through `/connect`. Signing in with Letta (`/login`, OAuth in the browser) stores agents in Letta Cloud and enables remote computers and secrets. Developer plans use Letta API keys.", "pricing": "freemium", "pricingNotes": "Free plan at $0 with bring-your-own keys and limited agents and storage. Pro $20 a month with Letta Auto quotas and up to 20 agents. API plan $20 a month plus $0.10 per active agent a month and $0.00015 a second of tool execution, with LLM usage at token cost.", "priceSummary": "$20 / mo", "where": "local", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the letta-code source, docs.letta.com's llms.txt or the pricing page (checked 2026-11-06).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 3793, "npmWeekly": 85863, "pypiWeekly": 2225, "asOf": "2026-11-06" }, "docsUrl": "https://docs.letta.com", "llmsTxt": "https://docs.letta.com/llms.txt", "capabilities": [ "agent.harness", "agent.mcp-client", "agent.multi-agent", "memory.store", "memory.search" ], "tags": [ "open-source", "local", "hosted", "freemium", "apache-2.0", "typescript", "cli", "headless", "telemetry", "llms-txt", "memory" ], "lastRelease": "2026-11-06", "graded": true, "anchor": { "graded": true, "score": 59.7, "grade": "C", "agentReady": false, "rank": 687, "ranked": true, "rankOf": 1510, "categoryRank": 18, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 67, "maintenance": 85, "payments": 60, "reliability": 58, "schema": 70, "security": 35, "transparency": 55 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-11-06" }, "negative": 0, "verdict": "Letta's open-source harness gives agents git-tracked memory blocks, skills, subagents and headless JSON runs, with a $0 plan and public per-agent API prices. It starts in the unrestricted permission mode, defaults to Letta Cloud, sends usage telemetry unless LETTA_CODE_TELEM=0 is set, and the V1 API server the comparisons describe is retired.", "bestFor": "Long-lived coding agents and assistants that keep memory and identity across sessions and machines.", "strengths": [ "Apache-2.0 harness on npm and PyPI with 0.34.42 released on 6 November 2026, and releases most days", "Memory blocks and MemFS keep an agent's context in git, with optional sync to the user's own repository", "Headless runs with `-p` and `--output-format json`, plus a TypeScript Agent SDK and a self-hosted App Server", "Public prices, a $0 plan with bring-your-own keys, and an API plan at $20 a month plus $0.10 per active agent", "Runs locally without signing in, with `letta backend local` or `--backend local`" ], "weaknesses": [ "The default permission mode is `unrestricted`, the renamed `bypassPermissions`, so tool calls aren't confirmed unless the user picks another mode", "Letta Cloud is the default backend, so agent memory and conversations go to Letta's servers unless the user chooses local", "Usage telemetry is on by default, with the LETTA_CODE_TELEM=0 opt-out found only in the source", "The Letta V1 Python API server is retired and unsupported, and the letta-ai/letta repository is now a landing page", "The privacy policy names no legal entity or date and says hosted message data may train future models" ], "agentNotes": [ "Start headless runs with an explicit permission mode such as `standard` or `strict`; the default auto-approves tools", "Pass `--backend local` for work that must stay on the machine, since Letta Cloud is the default", "Set LETTA_CODE_TELEM=0 in unattended runs if usage events must not be sent", "Use `letta -p --output-format json` for scripted runs and parse the JSON, not the terminal output", "Don't plan on the retired V1 REST server or `.af` AgentFile import; both are gone" ], "metrics": { "kind": "local", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 59.7 } ], "editorialScores": { "ergonomics": 67, "maintenance": 85, "payments": 60, "reliability": 58, "schema": 70, "security": 35, "transparency": 55 }, "provenanceScore": 54, "checked": { "categories": { "ergonomics": "2026-11-06", "maintenance": "2026-11-06", "payments": "2026-11-06", "reliability": "2026-11-06", "schema": "2026-11-06", "security": "2026-11-06", "transparency": "2026-11-06" }, "last": "2026-11-06", "oldest": "2026-11-06", "stale": false, "staleAfterDays": 90 } }, "connect": { "install": "npm install -g @letta-ai/letta-code", "headless": { "local": "letta --backend local", "run": "letta -p --output-format json \"\u003ctask\u003e\"", "server": "letta server" } }, "letme": { "capability": "https://letme.dev/agent.harness", "tool": "https://letme.dev/letta" }, "alsoIn": [ "agent-memory" ], "area": "frameworks", "unitPrices": [ { "item": "Pro plan", "unit": "month", "usd": 20, "note": "Letta Auto quotas, up to 20 agents" }, { "item": "API plan active agent", "unit": "month", "usd": 0.1, "note": "Plus $20 a month base and $0.00015 a second of tool execution" } ], "provenance": { "legalEntity": "", "domain": "letta.com", "domainRegistered": "1997-10-01", "endpointOnVendorDomain": null, "terms": "https://www.letta.com/terms-of-service", "privacy": "https://www.letta.com/privacy-policy", "statusPage": "", "changelog": "https://github.com/letta-ai/letta-code/releases", "securityTxt": "none", "checked": "2026-11-06", "notes": [ "The privacy policy shows no last-updated date and names no legal entity, only Letta. It says hosted message data may be used to train new models and that basic telemetry can be turned off in settings when supported.", "www.letta.com and docs.letta.com robots.txt allow all crawlers.", "RDAP gives letta.com a registration date of 1 October 1997, which predates the company, so the domain was bought later.", "/.well-known/security.txt returns 404. SECURITY.md in letta-ai/letta asks for reports to support@letta.com.", "The terms URL is the conventional path and was not read; the policy reader checks it at landing." ], "score": 54 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/letta.json", "live": { "slug": "letta", "versions": [ { "registry": "github", "name": "letta-ai/letta-code", "version": "v0.34.43", "released": "2026-11-06", "seenAt": "2026-11-06T23:39:39.434291816Z" }, { "registry": "npm", "name": "@letta-ai/letta-code", "version": "0.34.43", "seenAt": "2026-11-06T23:39:38.413416142Z" }, { "registry": "pypi", "name": "letta", "version": "0.34.12", "released": "2026-10-12", "seenAt": "2026-11-06T23:39:39.241816797Z" } ], "githubStars": 3794, "npmWeekly": 85863, "pypiWeekly": 2225, "securityTxt": { "url": "https://letta.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-11-07T16:01:02.768002207Z" }, "llmsTxt": { "url": "https://docs.letta.com/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-11-07T15:32:52.28674296Z" }, "pages": [ { "url": "https://www.letta.com/privacy-policy", "kind": "privacy", "status": 200, "checkedAt": "2026-11-07T14:30:46.549817082Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "947a68f3e3a0" }, { "url": "https://www.letta.com/terms-of-service", "kind": "terms", "status": 200, "checkedAt": "2026-11-07T14:30:48.740250784Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "63f31d6ebfb8" } ], "updatedAt": "2026-11-07T16:01:02.768002207Z" } }, "answer": "Letta scores 59.7 (C) on agent readiness against Paperclip's 52.6 (D), and leads in 1 of 7 scored categories. Paperclip leads on schema \u0026 documentation, security \u0026 auth and transparency \u0026 trust.", "b": { "slug": "paperclip", "name": "Paperclip", "vendor": "Paperclip Labs, Inc.", "vendorUrl": "https://paperclip.ing", "kind": "harness", "category": "agent-harnesses", "summary": "Paperclip is an open-source, self-hosted server and web interface that organises AI agents into a company with an org chart, tasks, budgets and approvals. It drives Claude Code, Codex, OpenClaw and other harnesses through adapters.", "url": "https://www.anchorterminal.com/tools/paperclip", "markdownUrl": "https://www.anchorterminal.com/tools/paperclip.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/paperclip.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/paperclip.json", "dns": "paperclip.grade.anchorterminal.com", "repo": "https://github.com/paperclipai/paperclip", "license": "MIT", "transports": [], "packages": [ { "registry": "npm", "name": "paperclipai" }, { "registry": "npm", "name": "@paperclipai/mcp-server" }, { "registry": "oci", "name": "ghcr.io/paperclipai/paperclip" } ], "auth": "mixed", "authNotes": "No Paperclip account. The default `local_trusted` mode needs no login on loopback. Authenticated mode uses browser sessions for people, board API keys for scripts, and agent API keys or short-lived run JWTs as bearer tokens.", "pricing": "free", "pricingNotes": "Free and MIT, self-hosted, with nothing to buy. The owner pays each harness's model provider or subscription. Paperclip Cloud is a waitlist with no published price.", "priceSummary": "Free · OSS", "where": "local", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the docs, the site or the server source (checked 2026-10-08). The only mention in the repository is a link to a third-party skill in a planning note.", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 98666, "npmWeekly": 59684, "pypiWeekly": null, "asOf": "2026-10-08" }, "docsUrl": "https://docs.paperclip.ing", "llmsTxt": "https://paperclip.ing/llms.txt", "capabilities": [ "agent.multi-agent", "agent.mcp-client" ], "tags": [ "open-source", "self-hosted", "local", "free", "no-card", "llms-txt", "docker", "mcp", "typescript" ], "lastRelease": "2026-10-23", "graded": true, "anchor": { "graded": true, "score": 52.6, "grade": "D", "agentReady": false, "rank": 982, "ranked": true, "rankOf": 1510, "categoryRank": 39, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 70, "maintenance": 78, "payments": 60, "reliability": 59, "schema": 81, "security": 64, "transparency": 66 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-11-04" }, "negative": -15, "negativeNotes": [ "Advisories counted one by one, at this run's values (a fixed Critical or High over two months old 1, a fixed Moderate the vendor published 1, an unfixed High 2). OSV holds eleven Paperclip advisories, all published 10 to 16 April 2026. Four fixed Criticals, among them GHSA-68qg-g8mg-6pr7 (CVE-2026-41679, unauthenticated remote code execution through an import authorisation bypass, fixed 2026.410.0) and the cross-tenant key flaws GHSA-3xx2-mqjm-hg9x and GHSA-47wq-cj9q-wpmp, -4. Three fixed Highs (GHSA-265w-rf2w-cjh4, GHSA-w8hx-hqjv-vjcq, GHSA-xfqj-r5qw-8g4j), -3. Three fixed Moderates (GHSA-3pw3-v88x-xj24, GHSA-p7mm-r948-4q3q and GHSA-fpw4-p57j-hqmq, a stored XSS in the UI's Markdown links), -3. https://api.osv.dev/v1/query", "2026-04-16. GHSA-gqqj-85qm-8qhf (High), a `codex_local` agent inherited a Gmail connector from the owner's ChatGPT account and sent real email. OSV lists no fixed version, and `codex_local` still defaults to bypassing approvals and the sandbox, so it counts as unfixed, -2. https://api.osv.dev/v1/vulns/GHSA-gqqj-85qm-8qhf", "2026-07-22. GHSA-x8hx-rhr2-9rf7 (9.6), drive-by remote code execution against the default `local_trusted` mode through DNS rebinding. Per the 8 October check the advisory names no patched version and the source applies the hostname guard to `local_trusted` private deployments, read as fixed, over two months old, -1. It is not in OSV. https://github.com/paperclipai/paperclip/security/advisories/GHSA-x8hx-rhr2-9rf7", "2026-10-24. Commit 5db57347 (#17435) fixes plugin diagnostics routes that let a board member of one company read another company's plugin log messages, job run errors and webhook delivery errors. It is on master and in canary builds only, in no stable release (2026.1023.0 was promoted from a beta tagged on 11 October), with no advisory, -3. https://github.com/paperclipai/paperclip/pull/17435", "-4 -3 -3 -2 -1 -3 = -16, held at the -15 floor." ], "verdict": "Board approvals, budgets with a hard stop and an activity log sit above whichever harnesses do the work, with ten stable versions in 90 days. The Claude Code and Codex adapters skip permission prompts and the sandbox by default, twelve security advisories have appeared since April 2026, and a 24 October cross-company read fix is in no stable release.", "bestFor": "Someone running several coding or operations agents who wants one place for tasks, budgets, approvals and history across harnesses.", "strengths": [ "One deployment runs agents on Claude Code, Codex, Cursor, Gemini CLI, OpenCode, Pi, Hermes, Grok Build, Kimi Code and OpenClaw through adapters, under one org chart", "Board approvals gate agent hires and the CEO agent's strategy, and connection actions can be set to Allowed, Ask first or Off", "Budgets by company, agent and project pause an agent at 100 per cent of recorded spend", "The running server publishes its REST surface as OpenAPI at `/api/openapi.json`, and the docs site answers every page as Markdown at `.md`", "Ten stable releases between 17 August and 23 October 2026, each with dated notes, a Breaking Changes section and an upgrade guide" ], "weaknesses": [ "`claude_local` defaults `dangerouslySkipPermissions` to true and `codex_local` defaults to bypassing approvals and the sandbox, with agents running on the host", "Twelve published security advisories since April 2026, five critical, including CVE-2026-41679 (unauthenticated remote code execution, fixed in 2026.410.0)", "Anonymous usage telemetry is on by default and goes to telemetry.paperclip.ing until an opt-out is set", "2,849 open issues on 8 October 2026, 1,396 of them with no comment, and 78 closed in 30 days against 686 opened", "Calendar versions with no 1.0, and release 2026.916.0 carried five breaking changes" ], "agentNotes": [ "Set `PAPERCLIP_TELEMETRY_DISABLED=1` or `DO_NOT_TRACK=1` before the first start. Telemetry is on by default", "Set `dangerouslySkipPermissions` and `dangerouslyBypassApprovalsAndSandbox` to false on agents that read untrusted input, or run them in a sandbox provider", "Install with Node.js 24.11 or newer, and install and sign in to each harness CLI on the host first. Paperclip assumes they are there", "Use `--bind lan` or `--bind tailnet` at onboarding for anything beyond one machine. The default `local_trusted` mode treats every request as the board admin", "Treat 409 on task checkout as owned by another agent and pick different work. The API docs say not to retry" ], "metrics": { "kind": "local", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "D", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 52.6 } ], "editorialScores": { "ergonomics": 70, "maintenance": 78, "payments": 60, "reliability": 59, "schema": 81, "security": 64, "transparency": 73 }, "provenanceScore": 58, "checked": { "categories": { "ergonomics": "2026-11-04", "maintenance": "2026-11-04", "payments": "2026-11-04", "reliability": "2026-11-04", "schema": "2026-11-04", "security": "2026-11-04", "transparency": "2026-11-04" }, "last": "2026-11-04", "lastMoved": "2026-11-04", "oldest": "2026-11-04", "stale": false, "staleAfterDays": 90 } }, "connect": { "install": "npx paperclipai@latest onboard --yes # Node.js 24.11 or newer", "http": "curl http://localhost:3100/api/health", "headless": { "command": "npx paperclipai issue create --title \"$TASK\" --json", "env": { "PAPERCLIP_API_KEY": "\u003cboard or agent key\u003e", "PAPERCLIP_TELEMETRY_DISABLED": "1" } } }, "letme": { "capability": "https://letme.dev/agent.multi-agent", "tool": "https://letme.dev/paperclip" }, "area": "frameworks", "provenance": { "legalEntity": "Paperclip Labs, Inc.", "domain": "paperclip.ing", "domainRegistered": "2026-03-02", "endpointOnVendorDomain": null, "terms": "https://paperclip.ing/terms/", "privacy": "https://paperclip.ing/privacy/", "statusPage": "", "changelog": "https://paperclip.ing/changelog/", "securityTxt": "none", "checked": "2026-10-08", "notes": [ "The terms (effective 1 April 2026, updated 23 July 2026) and the privacy policy (effective 23 July 2026) name Paperclip Labs, Inc. and Delaware law. The licence file in the repository reads Copyright (c) 2025 Paperclip AI.", "RDAP at the .ing registry gives a registration date of 2026-03-02 for paperclip.ing, with Cloudflare as registrar. The GitHub repository was created the same day.", "paperclip.ing/.well-known/security.txt and docs.paperclip.ing/.well-known/security.txt returned 404 on 8 October 2026. SECURITY.md sends reports to GitHub private advisories.", "The software is self-hosted, so there is no vendor endpoint or status page to check. status.paperclip.ing did not answer.", "The privacy policy says it governs the hosted services, and that a self-hosted deployment processes data on the owner's infrastructure." ], "score": 58 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/paperclip.json", "live": { "slug": "paperclip", "versions": [ { "registry": "github", "name": "paperclipai/paperclip", "version": "v2026.1106.0", "released": "2026-11-06", "seenAt": "2026-11-06T23:54:27.395759821Z" }, { "registry": "npm", "name": "@paperclipai/mcp-server", "version": "2026.1106.0", "seenAt": "2026-11-06T23:54:25.875367104Z" }, { "registry": "npm", "name": "paperclipai", "version": "2026.1106.0", "seenAt": "2026-11-06T23:54:25.202880061Z" } ], "githubStars": 111739, "npmWeekly": 55631, "securityTxt": { "url": "https://paperclip.ing/.well-known/security.txt", "state": "none", "checkedAt": "2026-11-07T16:01:01.774301174Z" }, "llmsTxt": { "url": "https://paperclip.ing/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-11-07T15:33:34.992030626Z" }, "domain": { "domain": "paperclip.ing", "registered": "2026-03-02", "source": "https://pubapi.registry.google/rdap/domain/paperclip.ing", "checkedAt": "2026-11-01T14:22:49.390462839Z" }, "pages": [ { "url": "https://paperclip.ing/changelog/", "kind": "changelog", "status": 304, "checkedAt": "2026-11-07T14:15:55.15829297Z", "changedAt": "2026-10-24T02:22:26.710785766Z", "fingerprint": "a227bbb641b7" }, { "url": "https://paperclip.ing/changelog/v2026.1001.0/", "kind": "deprecations", "status": 304, "checkedAt": "2026-11-07T14:15:57.262424846Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "f4181b1b6b88" }, { "url": "https://paperclip.ing/changelog/v2026.1005.0/", "kind": "deprecations", "status": 304, "checkedAt": "2026-11-07T14:15:59.373178947Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "802a09c9725b" }, { "url": "https://paperclip.ing/changelog/v2026.1012.0/", "kind": "deprecations", "status": 304, "checkedAt": "2026-11-07T14:16:01.420841708Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "0afbb1fc6f29" }, { "url": "https://paperclip.ing/changelog/v2026.1023.0/", "kind": "deprecations", "status": 304, "checkedAt": "2026-11-07T14:16:03.413299546Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "9a8de031b163" }, { "url": "https://paperclip.ing/changelog/v2026.916.0/", "kind": "deprecations", "status": 304, "checkedAt": "2026-11-07T14:16:05.190283004Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "1e69b918c7c5" }, { "url": "https://paperclip.ing/privacy/", "kind": "privacy", "status": 304, "checkedAt": "2026-11-07T14:16:07.376360782Z", "changedAt": "2026-10-24T02:22:28.926605099Z", "fingerprint": "0f001aba3049" }, { "url": "https://paperclip.ing/terms/", "kind": "terms", "status": 304, "checkedAt": "2026-11-07T14:16:09.360818389Z", "changedAt": "2026-10-24T02:22:30.943098177Z", "fingerprint": "42aee815daee" } ], "github": { "repo": "paperclipai/paperclip", "checkedAt": "2026-11-02T09:14:52.889851537Z", "stars": 110038, "archived": false, "issuesEnabled": true, "pushedAt": "2026-11-02T06:27:13Z", "openIssues": 3464, "openPRs": 3161, "issuesOpened90d": 1860, "issuesClosed90d": 461, "prsMerged90d": 2751, "ci": { "branch": "master", "runs": 50, "success": 43, "failure": 4, "other": 3, "latest": "success", "latestAt": "2026-11-02T06:27:47Z" }, "advisories": [ { "ghsa": "GHSA-x8hx-rhr2-9rf7", "severity": "critical", "published": "2026-07-22T23:12:15Z" }, { "ghsa": "GHSA-3xx2-mqjm-hg9x", "severity": "critical", "published": "2026-04-16T12:24:49Z" }, { "ghsa": "GHSA-fpw4-p57j-hqmq", "severity": "medium", "published": "2026-04-16T12:24:23Z" }, { "ghsa": "GHSA-p7mm-r948-4q3q", "severity": "medium", "published": "2026-04-16T12:24:03Z" }, { "ghsa": "GHSA-47wq-cj9q-wpmp", "severity": "critical", "published": "2026-04-16T12:23:29Z" }, { "ghsa": "GHSA-vr7g-88fq-vhq3", "severity": "critical", "published": "2026-04-16T12:21:04Z" }, { "ghsa": "GHSA-gqqj-85qm-8qhf", "severity": "high", "published": "2026-04-16T12:19:12Z" }, { "ghsa": "GHSA-xfqj-r5qw-8g4j", "severity": "high", "published": "2026-04-16T12:16:47Z" }, { "ghsa": "GHSA-w8hx-hqjv-vjcq", "severity": "high", "published": "2026-04-16T12:16:15Z" }, { "ghsa": "GHSA-265w-rf2w-cjh4", "cve": "CVE-2026-41208", "severity": "high", "published": "2026-04-16T12:15:14Z" }, { "ghsa": "GHSA-3pw3-v88x-xj24", "severity": "medium", "published": "2026-04-16T12:14:14Z" }, { "ghsa": "GHSA-68qg-g8mg-6pr7", "cve": "CVE-2026-41679", "severity": "critical", "published": "2026-04-10T16:50:27Z" } ] }, "updatedAt": "2026-11-07T16:01:01.774301174Z" } }, "edges": [ { "by": 29, "category": "security", "leads": "paperclip", "name": "Security \u0026 auth", "reasons": { "a": "Harness reading of the framework checklist, as for the other harnesses. 30 for what leaves the machine by default, 20 for approvals and sandboxing, 15 for injection posture, 15 for audit and 20 for the security programme. Letta Cloud is the default backend, so agent state and conversations go to Letta's servers, and telemetry is on by default (10 of 30). The default permission mode is `unrestricted`; `standard`, `acceptEdits` and `strict` are opt-in, and cloud sandboxes exist for remote work (4 of 20). No prompt-injection guidance found for fetched pages or channel messages (5 of 15). Conversation search and git history of memory give an operator a record of what the agent saw and changed (10 of 15). SECURITY.md routes reports to support@letta.com and scopes out the retired server; no security.txt, bounty or certification found (6 of 20). Total 35.", "b": "Harness reading of the framework checklist, as used for the other harnesses. 30 for what leaves the machine by default, 20 for approvals and sandboxing, 15 for prompt-injection posture, 15 for audit and 20 for the security programme. Anonymous usage telemetry is on by default and goes to telemetry.paperclip.ing. The README lists what is excluded and four opt-outs, and Sentry and OpenTelemetry stay off until configured. We found no first-run notice in the CLI source (18). Board approvals for hires and strategy, execution policies and per-action connection permissions, but `claude_local` defaults `dangerouslySkipPermissions` to true, `codex_local` defaults to bypassing approvals and the sandbox, local agents run on the host, sandbox providers are optional plugins and the default `local_trusted` mode has no login (10). A documented `low_trust_review` preset contains agents that read untrusted pull requests or tickets. It is opt-in (10). An activity log of mutating actions, run logs, cost events and audited board API keys (14). SECURITY.md with GitHub private reporting and twelve advisories published per the 8 October check, three now with CVEs in OSV. No security.txt, bug bounty or SOC 2 report found (12)." }, "scores": { "a": 35, "b": 64 } }, { "by": 11, "category": "schema", "leads": "paperclip", "name": "Schema \u0026 documentation", "reasons": { "a": "Harness reading. docs.letta.com serves llms.txt and a Markdown version of every page, with an `applies_to` block saying which backend and interface each page covers (10). TypeScript types for the Agent SDK and a documented App Server WebSocket protocol, but no JSON Schema or OpenAPI for the harness (15 of 25). Pages say when to use local or cloud backends, subagents and channels (14 of 20). Permission modes and options are typed in the SDK (12 of 15). Example applications and a remote client reference (11 of 15). Releases most days but no changelog file (8 of 15). Total 70.", "b": "The running server publishes OpenAPI at `/api/openapi.json` and validates requests with Zod, and the MCP server's tools take Zod schemas. No copy of the spec is published on the docs site, and paperclip.ing/openapi.json describes only the website (22). llms.txt at paperclip.ing, and docs pages answer as Markdown at `.md` (10). An API reference page per resource and task guides, but the MCP tool descriptions are one line each, such as List agents in a company (13). Typed inputs throughout, apart from the `paperclipApiRequest` tool, which takes any path under `/api` and a JSON body (12). cURL, JavaScript and Python examples and a status-code table, with one `{error}` shape and an occasional `details` field (12). A changelog page for every stable release and release notes in the repository, but the API path carries no version (12)." }, "scores": { "a": 70, "b": 81 } }, { "by": 11, "category": "transparency", "leads": "paperclip", "name": "Transparency \u0026 trust", "reasons": { "a": "Apache-2.0 (30). The privacy policy has no date, no legal entity and no retention periods, and says hosted message data may train future models (8 of 30). The README and docs mark AgentFile, the Electron app and the V1 server as deprecated or retired, without dated notice periods (12 of 20). Telemetry is described in the privacy policy only as basic and opt-out when supported; the LETTA_CODE_TELEM=0 switch appears only in the source (5 of 20). Total 55.", "b": "MIT (30). The privacy policy of 23 July 2026 separates self-hosted use from the hosted services and names Paperclip Labs, Inc., but keeps data as long as reasonably necessary, lists no subprocessors, and the 90-day telemetry retention appears only in source. The terms grant a broad licence over content sent to the services and allow model training on opt-in detailed telemetry (16). Release notes carry dated Breaking Changes sections and upgrade guides, with no written deprecation policy or notice period (10). The README discloses telemetry, what it excludes and four opt-outs, and the event contract is public in the repository, but it is on by default (17)." }, "scores": { "a": 55, "b": 66 } }, { "by": 7, "category": "maintenance", "leads": "letta", "name": "Maintenance \u0026 community", "reasons": { "a": "v0.34.42 on 6 November 2026 (30). Dozens of releases in 90 days (20). Pull requests are merged daily; recent issues from users have few replies (15 of 25). npm and PyPI packages and the Agent SDK track the releases (12 of 15). Lock files, CI and nightly smoke tests (8 of 10). Total 85.", "b": "Version 2026.1023.0, released on 23 October 2026 per its notes and the site banner (30). Ten stable releases from 2026.817.0 (17 August) to 2026.1023.0 in the 90 days to 4 November (20). Per the 8 October check, not re-read on 4 November, 650 pull requests merged in the last 30 days, but 2,849 issues and 3,338 pull requests were open, 1,396 open issues had no comment, and 309 of the 472 still-open issues from the two weeks before had none (8). `paperclipai` and `@paperclipai/mcp-server` publish from the same release workflow. We did not check the MCP registry (12). CI on master, a lockfile refresh workflow and signed image attestations (8). 30 + 20 + 8 + 12 + 8 = 78." }, "scores": { "a": 85, "b": 78 } } ], "facts": [ { "a": "Agent harness", "b": "Agent harness", "name": "Kind" }, { "a": "Letta", "b": "Paperclip Labs, Inc.", "name": "Vendor" }, { "a": "no (local only)", "b": "no (local only)", "name": "Hosted endpoint" }, { "a": "stdio", "b": "", "name": "Transports" }, { "a": "OAuth or key", "b": "OAuth or key", "name": "Auth" }, { "a": "Freemium", "b": "Free", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "Apache-2.0", "b": "MIT", "name": "Licence" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "2026-11-06", "b": "2026-10-23", "name": "Last release" }, { "a": "no date given", "b": "2026-07-23", "name": "Terms last updated" }, { "a": "no date given", "b": "2026-07-23", "name": "Privacy policy last updated" }, { "a": "not found in the text", "b": "yes, with an opt-out", "name": "Customer content may train models" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms restrict automated access" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms restrict benchmarking" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms or service can change without notice" }, { "a": "yes", "b": "yes", "name": "Arbitration or class-action waiver" }, { "a": "3.8k stars, 86k npm/wk, 2.2k PyPI/wk", "b": "99k stars, 60k npm/wk", "name": "Popularity" } ], "faq": [ { "answer": "Letta scores 59.7 (C) on agent readiness against Paperclip's 52.6 (D), and leads in 1 of 7 scored categories. Paperclip leads on schema \u0026 documentation, security \u0026 auth and transparency \u0026 trust.", "question": "Which is better for AI agents, Letta or Paperclip?" }, { "answer": "Yes. Letta is open source (Apache-2.0). Paperclip is open source (MIT).", "question": "Are Letta and Paperclip open source?" } ], "goodFor": [ { "aheadOn": [ "Maintenance \u0026 community, 85 against 78" ], "also": [ "Runs on your own machine", "No incidents deducted, where Paperclip loses 15 points for them" ], "goodFor": "Long-lived coding agents and assistants that keep memory and identity across sessions and machines.", "slug": "letta", "watchFor": "The default permission mode is `unrestricted`, the renamed `bypassPermissions`, so tool calls aren't confirmed unless the user picks another mode" }, { "aheadOn": [ "Schema \u0026 documentation, 81 against 70", "Security \u0026 auth, 64 against 35", "Transparency \u0026 trust, 66 against 55" ], "also": [ "Free to start without a card" ], "goodFor": "Someone running several coding or operations agents who wants one place for tasks, budgets, approvals and history across harnesses.", "slug": "paperclip", "watchFor": "`claude_local` defaults `dangerouslySkipPermissions` to true and `codex_local` defaults to bypassing approvals and the sandbox, with agents running on the host" } ], "history": { "letta": null, "paperclip": [ { "causes": [ "correction" ], "date": "2026-11-04", "delta": -6.4, "from": 59, "fromGrade": "C", "to": 52.6, "toGrade": "D" }, { "causes": [ "method" ], "date": "2026-10-27", "delta": 0, "from": 59, "fromGrade": "C", "to": 59, "toGrade": "C" } ] }, "job": { "capability": "agent.multi-agent", "name": "Multi-agent orchestration" }, "others": [ { "json": "https://www.anchorterminal.com/compare/agent-zero-vs-letta.json", "title": "Agent Zero vs Letta", "url": "https://www.anchorterminal.com/compare/agent-zero-vs-letta" }, { "json": "https://www.anchorterminal.com/compare/aider-vs-letta.json", "title": "Aider vs Letta", "url": "https://www.anchorterminal.com/compare/aider-vs-letta" }, { "json": "https://www.anchorterminal.com/compare/amp-vs-letta.json", "title": "Amp vs Letta", "url": "https://www.anchorterminal.com/compare/amp-vs-letta" }, { 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Paperclip", "url": "https://www.anchorterminal.com/compare/harnessrouter-vs-paperclip" }, { "json": "https://www.anchorterminal.com/compare/jules-vs-paperclip.json", "title": "Jules vs Paperclip", "url": "https://www.anchorterminal.com/compare/jules-vs-paperclip" }, { "json": "https://www.anchorterminal.com/compare/junie-vs-paperclip.json", "title": "Junie CLI vs Paperclip", "url": "https://www.anchorterminal.com/compare/junie-vs-paperclip" }, { "json": "https://www.anchorterminal.com/compare/kilo-code-cli-vs-paperclip.json", "title": "Kilo Code CLI vs Paperclip", "url": "https://www.anchorterminal.com/compare/kilo-code-cli-vs-paperclip" }, { "json": "https://www.anchorterminal.com/compare/kimi-code-cli-vs-paperclip.json", "title": "Kimi Code CLI vs Paperclip", "url": "https://www.anchorterminal.com/compare/kimi-code-cli-vs-paperclip" }, { "json": "https://www.anchorterminal.com/compare/kiro-cli-vs-paperclip.json", "title": "Kiro CLI vs Paperclip", "url": "https://www.anchorterminal.com/compare/kiro-cli-vs-paperclip" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-parallax-agents.json", "title": "Letta vs Parallax", "url": "https://www.anchorterminal.com/compare/letta-vs-parallax-agents" }, { "json": "https://www.anchorterminal.com/compare/minimax-code-vs-paperclip.json", "title": "MiniMax Code vs Paperclip", "url": "https://www.anchorterminal.com/compare/minimax-code-vs-paperclip" }, { "json": "https://www.anchorterminal.com/compare/mistral-vibe-cli-vs-paperclip.json", "title": "Mistral Vibe CLI vs Paperclip", "url": "https://www.anchorterminal.com/compare/mistral-vibe-cli-vs-paperclip" }, { "json": "https://www.anchorterminal.com/compare/muse-code-vs-paperclip.json", "title": "Muse Code vs Paperclip", "url": "https://www.anchorterminal.com/compare/muse-code-vs-paperclip" }, { "json": "https://www.anchorterminal.com/compare/opencode-vs-paperclip.json", "title": "OpenCode vs Paperclip", "url": "https://www.anchorterminal.com/compare/opencode-vs-paperclip" }, { "json": "https://www.anchorterminal.com/compare/openhands-vs-paperclip.json", "title": "OpenHands vs Paperclip", "url": "https://www.anchorterminal.com/compare/openhands-vs-paperclip" }, { "json": "https://www.anchorterminal.com/compare/openmausbot-vs-paperclip.json", "title": "OpenMausBot vs Paperclip", "url": "https://www.anchorterminal.com/compare/openmausbot-vs-paperclip" }, { "json": "https://www.anchorterminal.com/compare/orca-vs-paperclip.json", "title": "Orca vs Paperclip", "url": "https://www.anchorterminal.com/compare/orca-vs-paperclip" }, { "json": "https://www.anchorterminal.com/compare/paperclip-vs-parallax-agents.json", "title": "Paperclip vs Parallax", "url": "https://www.anchorterminal.com/compare/paperclip-vs-parallax-agents" }, { "json": "https://www.anchorterminal.com/compare/paperclip-vs-paseo.json", "title": "Paperclip vs Paseo", "url": "https://www.anchorterminal.com/compare/paperclip-vs-paseo" }, { "json": "https://www.anchorterminal.com/compare/paperclip-vs-prime-agent.json", "title": "Paperclip vs Prime Agent", "url": "https://www.anchorterminal.com/compare/paperclip-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/paperclip-vs-qoder-cli.json", "title": "Paperclip vs Qoder CLI", "url": "https://www.anchorterminal.com/compare/paperclip-vs-qoder-cli" }, { "json": "https://www.anchorterminal.com/compare/paperclip-vs-qwen-code.json", "title": "Paperclip vs Qwen Code", "url": "https://www.anchorterminal.com/compare/paperclip-vs-qwen-code" }, { "json": "https://www.anchorterminal.com/compare/paperclip-vs-reflection-mirror.json", "title": "Paperclip vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/paperclip-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/paperclip-vs-rovo-dev-cli.json", "title": "Paperclip vs Rovo Dev CLI", "url": "https://www.anchorterminal.com/compare/paperclip-vs-rovo-dev-cli" }, { "json": "https://www.anchorterminal.com/compare/paperclip-vs-sculptor.json", "title": "Paperclip vs Sculptor", "url": "https://www.anchorterminal.com/compare/paperclip-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/paperclip-vs-t3-code.json", "title": "Paperclip vs T3 Code", "url": "https://www.anchorterminal.com/compare/paperclip-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/paperclip-vs-traycer.json", "title": "Paperclip vs Traycer", "url": "https://www.anchorterminal.com/compare/paperclip-vs-traycer" }, { "json": "https://www.anchorterminal.com/compare/paperclip-vs-unstoppable.json", "title": "Paperclip vs Unstoppable", "url": "https://www.anchorterminal.com/compare/paperclip-vs-unstoppable" }, { "json": "https://www.anchorterminal.com/compare/paperclip-vs-verdent.json", "title": "Paperclip vs Verdent", "url": "https://www.anchorterminal.com/compare/paperclip-vs-verdent" }, { "json": "https://www.anchorterminal.com/compare/paperclip-vs-vibe-trading.json", "title": "Paperclip vs Vibe-Trading", "url": "https://www.anchorterminal.com/compare/paperclip-vs-vibe-trading" }, { "json": "https://www.anchorterminal.com/compare/paperclip-vs-warp.json", "title": "Paperclip vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/paperclip-vs-warp" } ], "panel": null, "scores": [ { "by": 1, "edge": "paperclip", "key": "reliability", "letta": 58, "name": "Reliability", "paperclip": 59, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 11, "edge": "paperclip", "key": "schema", "letta": 70, "name": "Schema \u0026 documentation", "paperclip": 81, "weight": 13 }, { "by": 3, "edge": "paperclip", "key": "ergonomics", "letta": 67, "name": "Agent ergonomics", "paperclip": 70, "weight": 13 }, { "by": 29, "edge": "paperclip", "key": "security", "letta": 35, "name": "Security \u0026 auth", "paperclip": 64, "weight": 14 }, { "by": 0, "edge": "", "key": "payments", "letta": 60, "name": "Payments \u0026 pricing", "paperclip": 60, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 7, "edge": "letta", "key": "maintenance", "letta": 85, "name": "Maintenance \u0026 community", "paperclip": 78, "weight": 7 }, { "by": 11, "edge": "paperclip", "key": "transparency", "letta": 55, "name": "Transparency \u0026 trust", "paperclip": 66, "weight": 7 } ], "summary": "Letta scores 59.7 (C) on agent readiness against Paperclip's 52.6 (D), and leads in 1 of 7 scored categories. Paperclip leads on schema \u0026 documentation, security \u0026 auth and transparency \u0026 trust. Both do multi-agent orchestration.", "tasks": null, "tutorials": [], "verdicts": { "letta": "Letta's open-source harness gives agents git-tracked memory blocks, skills, subagents and headless JSON runs, with a $0 plan and public per-agent API prices. It starts in the unrestricted permission mode, defaults to Letta Cloud, sends usage telemetry unless LETTA_CODE_TELEM=0 is set, and the V1 API server the comparisons describe is retired.", "paperclip": "Board approvals, budgets with a hard stop and an activity log sit above whichever harnesses do the work, with ten stable versions in 90 days. The Claude Code and Codex adapters skip permission prompts and the sandbox by default, twelve security advisories have appeared since April 2026, and a 24 October cross-company read fix is in no stable release." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/letta-vs-paperclip", "json": "https://www.anchorterminal.com/compare/letta-vs-paperclip.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/letta-vs-paperclip.md", "mcp": "https://www.anchorterminal.com/mcp", "slim": "https://www.anchorterminal.com/compare/letta-vs-paperclip.min.md" }, "markdown": "Letta scores 59.7 (C) on agent readiness against Paperclip's 52.6 (D), and leads in 1 of 7 scored categories. Paperclip leads on schema \u0026 documentation, security \u0026 auth and transparency \u0026 trust. Both do multi-agent orchestration.\n\n- Letta: grade C, 59.7/100, rank #687 of 1510. Markdown https://www.anchorterminal.com/tools/letta.md · JSON https://www.anchorterminal.com/api/v1/tools/letta.json\n- Paperclip: grade D, 52.6/100, rank #982 of 1510. Markdown https://www.anchorterminal.com/tools/paperclip.md · JSON https://www.anchorterminal.com/api/v1/tools/paperclip.json\n- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md\n- All 1500 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md\n- Best memory layers for AI agents: https://www.anchorterminal.com/best/agent-memory/index.md\n- All 353 memory comparisons: https://www.anchorterminal.com/compare/agent-memory/index.md\n\n## Which one, for what\n\n### Letta (C)\n\nGood for: Long-lived coding agents and assistants that keep memory and identity across sessions and machines.\n\nAhead on:\n- Maintenance \u0026 community, 85 against 78\n\nAlso in its favour:\n- Runs on your own machine\n- No incidents deducted, where Paperclip loses 15 points for them\n\nWatch for: The default permission mode is `unrestricted`, the renamed `bypassPermissions`, so tool calls aren't confirmed unless the user picks another mode\n\n### Paperclip (D)\n\nGood for: Someone running several coding or operations agents who wants one place for tasks, budgets, approvals and history across harnesses.\n\nAhead on:\n- Schema \u0026 documentation, 81 against 70\n- Security \u0026 auth, 64 against 35\n- Transparency \u0026 trust, 66 against 55\n\nAlso in its favour:\n- Free to start without a card\n\nWatch for: `claude_local` defaults `dangerouslySkipPermissions` to true and `codex_local` defaults to bypassing approvals and the sandbox, with agents running on the host\n\n\n## Why the edge\n\n### Security \u0026 auth: Paperclip +29\n\n- Letta (35): Harness reading of the framework checklist, as for the other harnesses. 30 for what leaves the machine by default, 20 for approvals and sandboxing, 15 for injection posture, 15 for audit and 20 for the security programme. Letta Cloud is the default backend, so agent state and conversations go to Letta's servers, and telemetry is on by default (10 of 30). The default permission mode is `unrestricted`; `standard`, `acceptEdits` and `strict` are opt-in, and cloud sandboxes exist for remote work (4 of 20). No prompt-injection guidance found for fetched pages or channel messages (5 of 15). Conversation search and git history of memory give an operator a record of what the agent saw and changed (10 of 15). SECURITY.md routes reports to support@letta.com and scopes out the retired server; no security.txt, bounty or certification found (6 of 20). Total 35.\n- Paperclip (64): Harness reading of the framework checklist, as used for the other harnesses. 30 for what leaves the machine by default, 20 for approvals and sandboxing, 15 for prompt-injection posture, 15 for audit and 20 for the security programme. Anonymous usage telemetry is on by default and goes to telemetry.paperclip.ing. The README lists what is excluded and four opt-outs, and Sentry and OpenTelemetry stay off until configured. We found no first-run notice in the CLI source (18). Board approvals for hires and strategy, execution policies and per-action connection permissions, but `claude_local` defaults `dangerouslySkipPermissions` to true, `codex_local` defaults to bypassing approvals and the sandbox, local agents run on the host, sandbox providers are optional plugins and the default `local_trusted` mode has no login (10). A documented `low_trust_review` preset contains agents that read untrusted pull requests or tickets. It is opt-in (10). An activity log of mutating actions, run logs, cost events and audited board API keys (14). SECURITY.md with GitHub private reporting and twelve advisories published per the 8 October check, three now with CVEs in OSV. No security.txt, bug bounty or SOC 2 report found (12).\n\n### Schema \u0026 documentation: Paperclip +11\n\n- Letta (70): Harness reading. docs.letta.com serves llms.txt and a Markdown version of every page, with an `applies_to` block saying which backend and interface each page covers (10). TypeScript types for the Agent SDK and a documented App Server WebSocket protocol, but no JSON Schema or OpenAPI for the harness (15 of 25). Pages say when to use local or cloud backends, subagents and channels (14 of 20). Permission modes and options are typed in the SDK (12 of 15). Example applications and a remote client reference (11 of 15). Releases most days but no changelog file (8 of 15). Total 70.\n- Paperclip (81): The running server publishes OpenAPI at `/api/openapi.json` and validates requests with Zod, and the MCP server's tools take Zod schemas. No copy of the spec is published on the docs site, and paperclip.ing/openapi.json describes only the website (22). llms.txt at paperclip.ing, and docs pages answer as Markdown at `.md` (10). An API reference page per resource and task guides, but the MCP tool descriptions are one line each, such as List agents in a company (13). Typed inputs throughout, apart from the `paperclipApiRequest` tool, which takes any path under `/api` and a JSON body (12). cURL, JavaScript and Python examples and a status-code table, with one `{error}` shape and an occasional `details` field (12). A changelog page for every stable release and release notes in the repository, but the API path carries no version (12).\n\n### Transparency \u0026 trust: Paperclip +11\n\n- Letta (55): Apache-2.0 (30). The privacy policy has no date, no legal entity and no retention periods, and says hosted message data may train future models (8 of 30). The README and docs mark AgentFile, the Electron app and the V1 server as deprecated or retired, without dated notice periods (12 of 20). Telemetry is described in the privacy policy only as basic and opt-out when supported; the LETTA_CODE_TELEM=0 switch appears only in the source (5 of 20). Total 55.\n- Paperclip (66): MIT (30). The privacy policy of 23 July 2026 separates self-hosted use from the hosted services and names Paperclip Labs, Inc., but keeps data as long as reasonably necessary, lists no subprocessors, and the 90-day telemetry retention appears only in source. The terms grant a broad licence over content sent to the services and allow model training on opt-in detailed telemetry (16). Release notes carry dated Breaking Changes sections and upgrade guides, with no written deprecation policy or notice period (10). The README discloses telemetry, what it excludes and four opt-outs, and the event contract is public in the repository, but it is on by default (17).\n\n### Maintenance \u0026 community: Letta +7\n\n- Letta (85): v0.34.42 on 6 November 2026 (30). Dozens of releases in 90 days (20). Pull requests are merged daily; recent issues from users have few replies (15 of 25). npm and PyPI packages and the Agent SDK track the releases (12 of 15). Lock files, CI and nightly smoke tests (8 of 10). Total 85.\n- Paperclip (78): Version 2026.1023.0, released on 23 October 2026 per its notes and the site banner (30). Ten stable releases from 2026.817.0 (17 August) to 2026.1023.0 in the 90 days to 4 November (20). Per the 8 October check, not re-read on 4 November, 650 pull requests merged in the last 30 days, but 2,849 issues and 3,338 pull requests were open, 1,396 open issues had no comment, and 309 of the 472 still-open issues from the two weeks before had none (8). `paperclipai` and `@paperclipai/mcp-server` publish from the same release workflow. We did not check the MCP registry (12). CI on master, a lockfile refresh workflow and signed image attestations (8). 30 + 20 + 8 + 12 + 8 = 78.\n\n## Score by category\n\n| Category | Weight | Letta | Paperclip | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 58 | 59 | Paperclip +1 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 70 | 81 | Paperclip +11 |\n| Agent ergonomics | 13% (16.2 this run) | 67 | 70 | Paperclip +3 |\n| Security \u0026 auth | 14% (17.5 this run) | 35 | 64 | Paperclip +29 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 60 | 60 | even |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 85 | 78 | Letta +7 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 55 | 66 | Paperclip +11 |\n| Negative events | ≤15 | 0 | -15 | |\n| **Total** | | **59.7 · C** | **52.6 · D** | |\n\n## Facts side by side\n\n| Fact | Letta | Paperclip |\n| --- | --- | --- |\n| Kind | Agent harness | Agent harness |\n| Vendor | Letta | Paperclip Labs, Inc. |\n| Hosted endpoint | no (local only) | no (local only) |\n| Transports | stdio | |\n| Auth | OAuth or key | OAuth or key |\n| Pricing | Freemium | Free |\n| x402 | no | no |\n| Licence | Apache-2.0 | MIT |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-11-06 | 2026-10-23 |\n| Terms last updated | no date given | 2026-07-23 |\n| Privacy policy last updated | no date given | 2026-07-23 |\n| Customer content may train models | not found in the text | yes, with an opt-out |\n| Terms restrict automated access | not found in the text | not found in the text |\n| Terms restrict benchmarking | not found in the text | not found in the text |\n| Terms or service can change without notice | not found in the text | not found in the text |\n| Arbitration or class-action waiver | yes | yes |\n| Popularity | 3.8k stars, 86k npm/wk, 2.2k PyPI/wk | 99k stars, 60k npm/wk |\n\n## How the scores have moved\n\n### Letta\n\nNo score change since it was listed.\n\n### Paperclip\n\n- -6.4 on 4 November 2026 (C to D): correction\n- no change on 27 October 2026: checklist\n\n## Verdicts\n\n**Letta.** Letta's open-source harness gives agents git-tracked memory blocks, skills, subagents and headless JSON runs, with a $0 plan and public per-agent API prices. It starts in the unrestricted permission mode, defaults to Letta Cloud, sends usage telemetry unless LETTA_CODE_TELEM=0 is set, and the V1 API server the comparisons describe is retired.\n\n**Paperclip.** Board approvals, budgets with a hard stop and an activity log sit above whichever harnesses do the work, with ten stable versions in 90 days. The Claude Code and Codex adapters skip permission prompts and the sandbox by default, twelve security advisories have appeared since April 2026, and a 24 October cross-company read fix is in no stable release.\n\n## Before you call either\n\n### Letta\n\n1. Start headless runs with an explicit permission mode such as `standard` or `strict`; the default auto-approves tools\n2. Pass `--backend local` for work that must stay on the machine, since Letta Cloud is the default\n3. Set LETTA_CODE_TELEM=0 in unattended runs if usage events must not be sent\n4. Use `letta -p --output-format json` for scripted runs and parse the JSON, not the terminal output\n5. Don't plan on the retired V1 REST server or `.af` AgentFile import; both are gone\n\n### Paperclip\n\n1. Set `PAPERCLIP_TELEMETRY_DISABLED=1` or `DO_NOT_TRACK=1` before the first start. Telemetry is on by default\n2. Set `dangerouslySkipPermissions` and `dangerouslyBypassApprovalsAndSandbox` to false on agents that read untrusted input, or run them in a sandbox provider\n3. Install with Node.js 24.11 or newer, and install and sign in to each harness CLI on the host first. Paperclip assumes they are there\n4. Use `--bind lan` or `--bind tailnet` at onboarding for anything beyond one machine. The default `local_trusted` mode treats every request as the board admin\n5. Treat 409 on task checkout as owned by another agent and pick different work. The API docs say not to retry\n\n## Questions\n\n### Which is better for AI agents, Letta or Paperclip?\n\nLetta scores 59.7 (C) on agent readiness against Paperclip's 52.6 (D), and leads in 1 of 7 scored categories. Paperclip leads on schema \u0026 documentation, security \u0026 auth and transparency \u0026 trust.\n\n### Are Letta and Paperclip open source?\n\nYes. Letta is open source (Apache-2.0). Paperclip is open source (MIT).\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/letta-vs-paperclip.json, and with the fewest tokens: https://www.anchorterminal.com/compare/letta-vs-paperclip.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"letta\", \"b\": \"paperclip\"}`. From a terminal: `anchor compare letta paperclip`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/letta.json and https://www.anchorterminal.com/api/v1/tools/paperclip.json\n\n## Other comparisons with Letta or Paperclip\n\n- [Agent Zero vs Letta](https://www.anchorterminal.com/compare/agent-zero-vs-letta.md)\n- [Aider vs Letta](https://www.anchorterminal.com/compare/aider-vs-letta.md)\n- [Amp vs Letta](https://www.anchorterminal.com/compare/amp-vs-letta.md)\n- [Antigravity CLI vs Letta](https://www.anchorterminal.com/compare/antigravity-cli-vs-letta.md)\n- [Auggie CLI vs Letta](https://www.anchorterminal.com/compare/auggie-vs-letta.md)\n- [AXLR vs Letta](https://www.anchorterminal.com/compare/axlr-vs-letta.md)\n- [Claude Code vs Letta](https://www.anchorterminal.com/compare/claude-code-vs-letta.md)\n- [Cline vs Letta](https://www.anchorterminal.com/compare/cline-vs-letta.md)\n- [Conductor vs Letta](https://www.anchorterminal.com/compare/conductor-vs-letta.md)\n- [Crush vs Letta](https://www.anchorterminal.com/compare/crush-vs-letta.md)\n- [Cursor CLI vs Letta](https://www.anchorterminal.com/compare/cursor-cli-vs-letta.md)\n- [DeepSeek Harness (dsh) vs Letta](https://www.anchorterminal.com/compare/deepseek-harness-vs-letta.md)\n- [dsh-superagent (DeepSeek) vs Letta](https://www.anchorterminal.com/compare/deepseek-superagent-vs-letta.md)\n- [Devin vs Letta](https://www.anchorterminal.com/compare/devin-vs-letta.md)\n- [Droid CLI vs Letta](https://www.anchorterminal.com/compare/droid-cli-vs-letta.md)\n- [Pi vs Letta](https://www.anchorterminal.com/compare/earendil-pi-vs-letta.md)\n- [Emdash vs Letta](https://www.anchorterminal.com/compare/emdash-vs-letta.md)\n- [Gemini CLI vs Letta](https://www.anchorterminal.com/compare/gemini-cli-vs-letta.md)\n- [GitHub Copilot CLI vs Letta](https://www.anchorterminal.com/compare/github-copilot-cli-vs-letta.md)\n- [goose vs Letta](https://www.anchorterminal.com/compare/goose-vs-letta.md)\n- [Harness² vs Letta](https://www.anchorterminal.com/compare/harness2-vs-letta.md)\n- [HarnessRouter vs Letta](https://www.anchorterminal.com/compare/harnessrouter-vs-letta.md)\n- [Jules vs Letta](https://www.anchorterminal.com/compare/jules-vs-letta.md)\n- [Junie CLI vs Letta](https://www.anchorterminal.com/compare/junie-vs-letta.md)\n- [Kilo Code CLI vs Letta](https://www.anchorterminal.com/compare/kilo-code-cli-vs-letta.md)\n- [Kimi Code CLI vs Letta](https://www.anchorterminal.com/compare/kimi-code-cli-vs-letta.md)\n- [Kiro CLI vs Letta](https://www.anchorterminal.com/compare/kiro-cli-vs-letta.md)\n- [Letta vs mini-swe-agent](https://www.anchorterminal.com/compare/letta-vs-mini-swe-agent.md)\n- [Letta vs MiniMax Code](https://www.anchorterminal.com/compare/letta-vs-minimax-code.md)\n- [Letta vs Mistral Vibe CLI](https://www.anchorterminal.com/compare/letta-vs-mistral-vibe-cli.md)\n- [Letta vs Muse Code](https://www.anchorterminal.com/compare/letta-vs-muse-code.md)\n- [Letta vs OpenAI Agents API](https://www.anchorterminal.com/compare/letta-vs-openai-agents-api.md)\n- [Letta vs OpenAI Codex](https://www.anchorterminal.com/compare/letta-vs-openai-codex.md)\n- [Letta vs OpenCode](https://www.anchorterminal.com/compare/letta-vs-opencode.md)\n- [Letta vs OpenHands](https://www.anchorterminal.com/compare/letta-vs-openhands.md)\n- [Letta vs OpenMausBot](https://www.anchorterminal.com/compare/letta-vs-openmausbot.md)\n- [Letta vs Orca](https://www.anchorterminal.com/compare/letta-vs-orca.md)\n- [Letta vs Paseo](https://www.anchorterminal.com/compare/letta-vs-paseo.md)\n- [Letta vs Prime Agent](https://www.anchorterminal.com/compare/letta-vs-prime-agent.md)\n- [Letta vs Qoder CLI](https://www.anchorterminal.com/compare/letta-vs-qoder-cli.md)\n- [Letta vs Qwen Code](https://www.anchorterminal.com/compare/letta-vs-qwen-code.md)\n- [Letta vs Mirror CLI](https://www.anchorterminal.com/compare/letta-vs-reflection-mirror.md)\n- [Letta vs Rovo Dev CLI](https://www.anchorterminal.com/compare/letta-vs-rovo-dev-cli.md)\n- [Letta vs Sculptor](https://www.anchorterminal.com/compare/letta-vs-sculptor.md)\n- [Letta vs T3 Code](https://www.anchorterminal.com/compare/letta-vs-t3-code.md)\n- [Letta vs Traycer](https://www.anchorterminal.com/compare/letta-vs-traycer.md)\n- [Letta vs Unstoppable](https://www.anchorterminal.com/compare/letta-vs-unstoppable.md)\n- [Letta vs Verdent](https://www.anchorterminal.com/compare/letta-vs-verdent.md)\n- [Letta vs Vibe-Trading](https://www.anchorterminal.com/compare/letta-vs-vibe-trading.md)\n- [Letta vs Warp (Warp Agent CLI and the Oz Agent API)](https://www.anchorterminal.com/compare/letta-vs-warp.md)\n- [Amp vs Paperclip](https://www.anchorterminal.com/compare/amp-vs-paperclip.md)\n- [Antigravity CLI vs Paperclip](https://www.anchorterminal.com/compare/antigravity-cli-vs-paperclip.md)\n- [Auggie CLI vs Paperclip](https://www.anchorterminal.com/compare/auggie-vs-paperclip.md)\n- [AXLR vs 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Paperclip](https://www.anchorterminal.com/compare/openhands-vs-paperclip.md)\n- [OpenMausBot vs Paperclip](https://www.anchorterminal.com/compare/openmausbot-vs-paperclip.md)\n- [Orca vs Paperclip](https://www.anchorterminal.com/compare/orca-vs-paperclip.md)\n- [Paperclip vs Parallax](https://www.anchorterminal.com/compare/paperclip-vs-parallax-agents.md)\n- [Paperclip vs Paseo](https://www.anchorterminal.com/compare/paperclip-vs-paseo.md)\n- [Paperclip vs Prime Agent](https://www.anchorterminal.com/compare/paperclip-vs-prime-agent.md)\n- [Paperclip vs Qoder CLI](https://www.anchorterminal.com/compare/paperclip-vs-qoder-cli.md)\n- [Paperclip vs Qwen Code](https://www.anchorterminal.com/compare/paperclip-vs-qwen-code.md)\n- [Paperclip vs Mirror CLI](https://www.anchorterminal.com/compare/paperclip-vs-reflection-mirror.md)\n- [Paperclip vs Rovo Dev CLI](https://www.anchorterminal.com/compare/paperclip-vs-rovo-dev-cli.md)\n- [Paperclip vs Sculptor](https://www.anchorterminal.com/compare/paperclip-vs-sculptor.md)\n- [Paperclip vs T3 Code](https://www.anchorterminal.com/compare/paperclip-vs-t3-code.md)\n- [Paperclip vs Traycer](https://www.anchorterminal.com/compare/paperclip-vs-traycer.md)\n- [Paperclip vs Unstoppable](https://www.anchorterminal.com/compare/paperclip-vs-unstoppable.md)\n- [Paperclip vs Verdent](https://www.anchorterminal.com/compare/paperclip-vs-verdent.md)\n- [Paperclip vs Vibe-Trading](https://www.anchorterminal.com/compare/paperclip-vs-vibe-trading.md)\n- [Paperclip vs Warp (Warp Agent CLI and the Oz Agent API)](https://www.anchorterminal.com/compare/paperclip-vs-warp.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "attributionRequired": true, "credit": "CC BY 4.0, credit Anchor Terminal and link the page or API address you took it from (https://www.anchorterminal.com/terms/#data)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-11-07", 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