# Conductor vs Letta (slim)

> Letta scores 59.7 (C) to Conductor's 41.3 (E) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/conductor-vs-letta.md (~5,400 tokens) · this version ~1,880 tokens · JSON https://www.anchorterminal.com/compare/conductor-vs-letta.json · canonical https://www.anchorterminal.com/compare/conductor-vs-letta
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-11-07
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Letta scores 59.7 (C) on agent readiness against Conductor's 41.3 (E), and leads in 6 of 7 scored categories. Conductor leads on security & auth. Both do agent harnesses.

- Conductor: E 41.3, rank #1285 of 1486 · https://www.anchorterminal.com/tools/conductor.min.md
- Letta: C 59.7, rank #684 of 1486 · https://www.anchorterminal.com/tools/letta.min.md
- Conductor, good for Existing Conductor users planning their move before Cloud closes on 20 November 2026 and the local app winds down in early 2027. Ahead on Security & auth, 45 against 35.
- Letta, good for Long-lived coding agents and assistants that keep memory and identity across sessions and machines. Ahead on Reliability, 58 against 25; Schema & documentation, 70 against 60; Agent ergonomics, 67 against 55; Payments & pricing, 60 against 0; Maintenance & community, 85 against 58. Also Runs on your own machine; Open source.

| Category | Conductor | Letta |
| --- | --- | --- |
| Reliability (16%) | 25 | 58 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 60 | 70 |
| Agent ergonomics (13%) | 55 | 67 |
| Security & auth (14%) | 45 | 35 |
| Payments & pricing (10%) | 0 | 60 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 58 | 85 |
| Transparency & trust (7%) | 53 | 55 |

| Fact (where they differ) | Conductor | Letta |
| --- | --- | --- |
| Vendor | Conductor (joining Meta) | Letta |
| Transports |  | stdio |
| Pricing | Paid | Freemium |
| Licence | Proprietary. A closed-source Mac app and hosted Conductor Cloud under Conductor's terms | Apache-2.0 |
| llms.txt | no | yes |
| Last release | 2026-11-04 | 2026-11-06 |
| Terms last updated | not read yet | no date given |
| Privacy policy last updated | not read yet | no date given |
| Customer content may train models | not read yet | not found in the text |
| Terms restrict automated access | not read yet | not found in the text |
| Terms restrict benchmarking | not read yet | not found in the text |
| Terms or service can change without notice | not read yet | not found in the text |
| Arbitration or class-action waiver | not read yet | yes |
| Popularity | none | 3.8k stars, 86k npm/wk, 2.2k PyPI/wk |

Why the edge:
- Payments & pricing, Letta +60: Conductor 0 (No new sign-ups since 4 November, free users can't upgrade, and no price is shown. No protocol, no published price, no open free tier, no onboarding (0).); Letta 60 (No x402, MPP or L402 (0 of 40). Per-unit API prices are public, $0.10 per active agent a month and $0.00015 a second of tool execution, plus plan prices (20). A $0 plan with bring-your-own keys; no card is mentioned (20). The CLI runs locally without signing in (20). Total 60.)
- Reliability, Letta +33: Conductor 25 (Read as local software that is winding down. Installed from Conductor's own download, which stopped taking new users on 4 November 2026 (10). Closed source, so no public CI or issue tracker (0, 0). A dated changelog, newest 0.93.0 on 4 November (15). Version 0.93 (0). 10 + 0 + 0 + 15 + 0 = 25.); Letta 58 (Local-software lines, read for the harness. `@letta-ai/letta-code` on npm with Node.js 22.19 or newer, and PyPI wheels for glibc Linux, macOS 14 and Windows x64 with Python 3.9 or newer stated (20). ci.yml, nightly update smoke tests and Telegram live smoke tests exist, but GitHub's API answered with a rate limit, so run results were unread (15 of 25, unchecked). 332 open issues and pull requests, mostly pull requests; recent bug reports such as recall reading the wrong conversation have no reply yet (15 of 25). 398 tags at 0.34.x with release notes on GitHub, no changelog file, and breaking removals such as AgentFile announced in the README (8 of 15). Pre-1.0 (0). Total 58.)
- Maintenance & community, Letta +27: Conductor 58 (0.93.0 on 4 November 2026 (30). Several dated releases in 90 days, per the changelog index (20). Discord, a subreddit and email for support (8). Closed app, no package or CI to read (0). 30 + 20 + 8 + 0 + 0 = 58. The local app gets new models and critical fixes only until early 2027.); 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.)
- Agent ergonomics, Letta +12: Conductor 55 (Harness reading. Each task gets a workspace, branch, terminal and diff, with pull requests and merges from the app, and an API for integrations; not re-read in detail (55).); Letta 67 (Harness reading. Toolsets switch with `/model`, skills load per agent, and subagents run in the background (18 of 25). Context is managed through memory blocks, reflection and dreaming (12 of 20). `letta -p --output-format json` for scripted runs and an App Server for programmatic control (12 of 20). Conversations resume by agent and conversation id, and memory is git-tracked so changes can be reverted (15 of 20). Runs with no account on the local backend, with one SDK language, TypeScript (10 of 15). Total 67.)
- Schema & documentation, Letta +10: Conductor 60 (Harness reading. Docs for workspaces, review and merge, a Conductor API reference page linked from the docs (not read), and security and permissions pages (60).); 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.)
- Security & auth, Conductor +10: Conductor 45 (Closed app. Telemetry and data handling weren't read beyond the transition notice (10 of 30). A security and permissions page (10 of 20). No prompt-injection guidance found (5). No audit log found (5). SOC 2 Type II report at trust.conductor.build (15 of 20). 10 + 10 + 5 + 5 + 15 = 45.); 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.)