# Context Mode Engine vs EverOS

> EverOS scores 69.4 (B) to Context Mode Engine's 54.6 (C) for memory search. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/context-mode-vs-everos
- Markdown: https://www.anchorterminal.com/compare/context-mode-vs-everos.md (~4,500 tokens)
- Site index for agents: https://www.anchorterminal.com/llms.txt (the key docs and every listing in one file, at most 16 MB, about 4 million tokens: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- DNS: dig +short TXT <slug>.grade.anchorterminal.com (the grade as a DNS TXT record, for a sandbox with no HTTP where names still resolve; also top., best.<category>. and <a>.vs.<b>. under the zone, and the same under grade.letme.dev)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-11-07

EverOS scores 69.4 (B) on agent readiness against Context Mode Engine's 54.6 (C), and leads in 5 of 7 scored categories. Both do memory search.

- Context Mode Engine: grade C, 54.6/100, rank #898 of 1486. Markdown https://www.anchorterminal.com/tools/context-mode.md · JSON https://www.anchorterminal.com/api/v1/tools/context-mode.json
- EverOS: grade B, 69.4/100, rank #246 of 1486. Markdown https://www.anchorterminal.com/tools/everos.md · JSON https://www.anchorterminal.com/api/v1/tools/everos.json
- Best memory layers for AI agents: https://www.anchorterminal.com/best/agent-memory/index.md
- All 353 memory comparisons: https://www.anchorterminal.com/compare/agent-memory/index.md

## Which one, for what

### Context Mode Engine (C)

Good for: Coding-agent users who want large tool output kept out of the context window on their own machine.

Watch for: Elastic License 2.0, not an OSI licence, with hosted-service restrictions

### EverOS (B)

Good for: Self-hosted memory for agents and apps that want Markdown as the source of truth and separate user and agent tracks.

Ahead on:
- Reliability, 79 against 60
- Schema & documentation, 89 against 67
- Security & auth, 47 against 35
- Maintenance & community, 80 against 55
- Transparency & trust, 71 against 54

Also in its favour:
- Open source

Watch for: The local HTTP server has no authentication and relies on binding to 127.0.0.1


## Why the edge

### Maintenance & community: EverOS +25

- Context Mode Engine (55): v2.1.0 tagged on 5 November 2026 by the release workflow, after v2.0.0, v2.0.1 and v2.0.2 on 4 November, and the README now names 2.0 as the npm latest (30). Four stable releases in the 90 days from 7 August. 2.0.1 only fixes release manifests, and 2.0.0, 2.0.2 and 2.1.0 change code (20). Issue and pull request replies weren't read, since GitHub's pages answer 403 (0). No official MCP registry entry read (0). CI on three systems and two Node lines, results unread (5 of 10). 30+20+0+0+5 = 55.
- EverOS (80): v1.5.1 on 22 October 2026 (30). Five tagged releases in 90 days and 12 PyPI uploads (20). Maintainer replies on some issues, others from outside users unanswered for weeks (12 of 25). Python library and the everos-mcp package, not in the official MCP registry (10 of 15). uv.lock, CI, docs and release workflows (8 of 10). Total 80.

### Schema & documentation: EverOS +22

- Context Mode Engine (67): No published contract. The tool input schemas sit in the source, and the docs show them as a table (0 of 25). llms.txt and Markdown copies of every page on contextmode.ai (10). Each tool description says what it does and when to use it, for example `ctx_purge` "Use it only when the user asks to forget or reset data" (20). The tools reference lists each tool's inputs with optional fields and allowed values (`scope` session, worktree or project; `sort` relevance or timeline; `mode` upgrade or uninstall), and every tool rejects an unknown field with `UNKNOWN_FIELD` (12 of 15). Setup, doctor and troubleshooting pages with examples and fix lines (15). Tagged releases, without a readable changelog (10 of 15). 0+10+20+12+15+10 = 67.
- EverOS (89): OpenAPI document in the repository with 40 operations, every one with a description (25). llms.txt and llms-full.txt on docs.evermind.ai (10). Operation descriptions state purpose; when-not-to-use guidance appears in the docs, such as flush after add, rather than per operation (15 of 20). Typed request models with filter operators eq, ne, gt, gte, lt, lte and in, and 422 on malformed ids (12 of 15). curl examples for add, flush and search, and typed error codes such as SESSION_BUSY and EXTERNAL_SERVICE_UNAVAILABLE (12 of 15). `/api/v2` with `/api/v1` kept as a legacy alias, a changelog and release notes (15). Total 89.

### Reliability: EverOS +19

- Context Mode Engine (60): Read with the local-package lines. Installs from npm as `context-mode`, with Node 24.15.0 or later stated in package.json and the README (20). A public CI workflow runs the test gate on macOS, Linux and Windows under Node 24.15.0 and 26 on every push, and the release workflow runs it before each publish. GitHub's pages answer 403 in this session, so run results couldn't be read (15 of 25). Open crash and regression issues weren't read (0). Versioned releases, with 2.0.0 a major for the rewrite and 2.0.0-next prereleases from 27 October, but no changelog file in the repository and the GitHub release notes unread (10 of 15). Version 2.1.0, past 1.0 (15). 20+15+0+10+15 = 60.
- EverOS (79): Local-software lines, as a library and server the owner runs. `everos` on PyPI with Python 3.12 or newer stated, plus a Windows guide (20). ci.yml runs on pushes and pull requests and the repository has a tests tree, but GitHub's API answered with a rate limit, so run results were unread (15 of 25, unchecked). 43 open issues and pull requests against 82 commits in 90 days; several outside bug reports, including a silent capture failure in the DSH plugin, have no reply (14 of 25). Keep a Changelog with semantic versioning declared and a 1.0 migration guide (15). Version 1.5.1 (15). Total 79.

### Transparency & trust: EverOS +17

- Context Mode Engine (54): Elastic License 2.0, source available but not an OSI licence, with limits on offering it as a hosted service (15). The Engine privacy page says data stays in `~/.context-mode`, gives retention (indexed items go after 30 days unread, 500 MB per project, idle projects after 14 days) and deletion by `ctx_purge`. The site privacy page is a summary for the Gateway that points to e-mail for the full policy (25 of 30). No deprecation policy or dated notices (0). The README and docs state zero telemetry and list each network call, with a source test that flags new call sites. We found no telemetry in the source (20). 15+25+0+20 = 60.
- EverOS (71): Apache-2.0 with a NOTICE file (30). Local data stays in the owner's Markdown and indexes. For the cloud, the privacy policy gives no retention periods, the terms and privacy policy word the training exceptions differently, and the privacy contact link points to a miromind.ai address (12 of 30). The README marks `/api/v1` as a legacy alias that may be removed in a future major release, and a 1.0 migration guide exists, with no notice period (14 of 20). No outbound telemetry was found in the source, and the docs don't address it (10 of 20). Total 66.

### Security & auth: EverOS +12

- Context Mode Engine (35): Read with the framework lines for a local MCP server. No credential of its own; code runs as the user under the agent's own permission checks (10). On Claude Code the PreToolUse hook applies the user's deny rules first, and `CONTEXT_MODE_REQUIRE_SECURITY=1` denies every call while a settings file is broken (15). `ctx_index` blocks private and link-local addresses when it fetches a URL, but no guidance on instructions inside fetched pages or tool output (0). Each project keeps a local session log of prompts, edits, commands and errors (10). No SECURITY.md, security.txt or disclosure route found, and no advisory names the package (0). 10+15+0+10+0 = 35.
- EverOS (47): Framework reading for software the owner runs. The local server has no authentication and no security scheme in the OpenAPI document, relying on a 127.0.0.1 bind by default (15 of 30). No read-only mode; the cloud purge is two-step (8 of 20). Memories are extracted from conversations and returned into prompts, and everos-mcp tells hosts to save facts unprompted, with no injection guidance found (4 of 15). Structured logs and lock metrics, no audit log (6 of 15). SECURITY.md with a reporting address, five-day acknowledgement, supported versions and a published-advisories section, plus a valid security.txt (14 of 20). Total 47.

## Score by category

| Category | Weight | Context Mode Engine | EverOS | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 60 | 79 | EverOS +19 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 67 | 89 | EverOS +22 |
| Agent ergonomics | 13% (16.2 this run) | 80 | 78 | Context Mode Engine +2 |
| Security & auth | 14% (17.5 this run) | 35 | 47 | EverOS +12 |
| Payments & pricing | 10% (12.5 this run) | 40 | 40 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 55 | 80 | EverOS +25 |
| Transparency & trust | 7% (8.8 this run) | 54 | 71 | EverOS +17 |
| Negative events | ≤15 | -2 | 0 | |
| **Total** | | **54.6 · C** | **69.4 · B** | |

## Facts side by side

| Fact | Context Mode Engine | EverOS |
| --- | --- | --- |
| Kind | MCP server | HTTP API |
| Vendor | MKSF LTD | Evermind AI, Inc. |
| Hosted endpoint | no (local only) | no (local only) |
| Transports | stdio | HTTP, stdio |
| Auth | None | None |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | Elastic License 2.0, source available with restrictions on hosted or managed services. | Apache-2.0 |
| Tools exposed | 9 | 7 |
| Read-only variant documented | no | no |
| llms.txt | no | yes |
| Last release | 2026-11-05 | 2026-10-22 |
| Terms last updated | no date given | 2026-01-20 |
| Privacy policy last updated | no date given | 2026-01-20 |
| Customer content may train models | not found in the text | yes |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | not found in the text | yes |
| Terms or service can change without notice | not found in the text | yes |
| Arbitration or class-action waiver | not found in the text | not found in the text |
| Popularity | 31k stars | 14k stars, 4k PyPI/wk |
| Agent reviews | 3.5/5 (4) | none |

## How the scores have moved

### Context Mode Engine

- +8.4 on 5 November 2026 (D to C): product, new evidence
- +0.4 on 27 October 2026 (E to D): checklist

### EverOS

No score change since it was listed.

## Verdicts

**Context Mode Engine.** Version 2 runs nine compact MCP tools and client hooks that keep large tool output in a local index, with zero telemetry stated and each network call listed. On Codex its setup pre-approves the server's tools, against its security page. The Elastic License 2.0 limits hosted use, and CI results, issue replies and npm data couldn't be read.

**EverOS.** EverOS keeps agent and user memory as Markdown with SQLite and LanceDB indexes, behind a described OpenAPI with typed, retryable errors and an MCP server, under Apache-2.0 at version 1.5.1. The local server has no authentication, EverOS Cloud prices are not published, and the cloud terms forbid automated data extraction.

## Before you call either

### Context Mode Engine

1. Install Node 24.15.0 or later first. Version 2 no longer runs on Node 22
2. Use the install command for the exact coding agent, then run `ctx_doctor`
3. Keep the agent's permission prompts on. Code from `ctx_execute` runs as the user with full network access
4. Call `ctx_purge` only when the user asks. It deletes for good
5. Review the Elastic licence before hosting the Engine for others

### EverOS

1. Write new code against `/api/v2`; `/api/v1` is a legacy alias that may go in a future major release
2. Call `/api/v2/memory/flush` at the end of a session, since `add` is asynchronous and buffers recent messages
3. Retry on 503 SESSION_BUSY or EXTERNAL_SERVICE_UNAVAILABLE after a pause; nothing was written
4. Keep `host` at 127.0.0.1 unless something in front adds authentication
5. Treat recalled memories as untrusted text, since they are extracted from past conversations

## Questions

### Which is better for AI agents, Context Mode Engine or EverOS?

EverOS scores 69.4 (B) on agent readiness against Context Mode Engine's 54.6 (C), and leads in 5 of 7 scored categories.

### Do Context Mode Engine and EverOS need an API key?

Neither needs a key.

### Can an agent call Context Mode Engine and EverOS without installing anything?

Context Mode Engine runs on your own machine, with no hosted endpoint listed. EverOS runs on your own machine, with no hosted endpoint listed.

### Are Context Mode Engine and EverOS open source?

No open-source release is listed for Context Mode Engine. EverOS is open source (Apache-2.0).


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/context-mode-vs-everos.json, and with the fewest tokens: https://www.anchorterminal.com/compare/context-mode-vs-everos.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "context-mode", "b": "everos"}`. From a terminal: `anchor compare context-mode everos`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/context-mode.json and https://www.anchorterminal.com/api/v1/tools/everos.json

## Other comparisons with Context Mode Engine or EverOS

- [Amazon Bedrock AgentCore Memory vs EverOS](https://www.anchorterminal.com/compare/agentcore-memory-vs-everos.md)
- [Basic Memory vs EverOS](https://www.anchorterminal.com/compare/basic-memory-vs-everos.md)
- [claude-mem vs EverOS](https://www.anchorterminal.com/compare/claude-mem-vs-everos.md)
- [Cognee vs EverOS](https://www.anchorterminal.com/compare/cognee-vs-everos.md)
- [EverOS vs Agent Platform Memory Bank](https://www.anchorterminal.com/compare/everos-vs-google-memory-bank.md)
- [EverOS vs Graphicle](https://www.anchorterminal.com/compare/everos-vs-graphicle.md)
- [EverOS vs Graphiti](https://www.anchorterminal.com/compare/everos-vs-graphiti.md)
- [EverOS vs Hindsight](https://www.anchorterminal.com/compare/everos-vs-hindsight.md)
- [EverOS vs Honcho](https://www.anchorterminal.com/compare/everos-vs-honcho.md)
- [EverOS vs Hy Memory](https://www.anchorterminal.com/compare/everos-vs-hy-memory.md)
- [EverOS vs LangMem](https://www.anchorterminal.com/compare/everos-vs-langmem.md)
- [EverOS vs LocalGhost](https://www.anchorterminal.com/compare/everos-vs-localghost.md)
- [EverOS vs Mem0 Platform + MCP](https://www.anchorterminal.com/compare/everos-vs-mem0.md)
- [EverOS vs MemMachine](https://www.anchorterminal.com/compare/everos-vs-memmachine.md)
- [EverOS vs Memori](https://www.anchorterminal.com/compare/everos-vs-memori.md)
- [EverOS vs Memory (MCP reference server)](https://www.anchorterminal.com/compare/everos-vs-memory-reference-server.md)
- [EverOS vs MemPalace](https://www.anchorterminal.com/compare/everos-vs-mempalace.md)
- [EverOS vs past.dev](https://www.anchorterminal.com/compare/everos-vs-past-dev.md)
- [EverOS vs Supermemory API + MCP](https://www.anchorterminal.com/compare/everos-vs-supermemory.md)
- [EverOS vs TencentDB Agent Memory](https://www.anchorterminal.com/compare/everos-vs-tencentdb-agent-memory.md)
- [EverOS vs Tokenrip](https://www.anchorterminal.com/compare/everos-vs-tokenrip.md)
- [EverOS vs Zep](https://www.anchorterminal.com/compare/everos-vs-zep.md)
- [Amazon Bedrock AgentCore Memory vs Context Mode Engine](https://www.anchorterminal.com/compare/agentcore-memory-vs-context-mode.md)
- [AI Memory vs Context Mode Engine](https://www.anchorterminal.com/compare/ai-memory-vs-context-mode.md)
- [AI Memory vs EverOS](https://www.anchorterminal.com/compare/ai-memory-vs-everos.md)
- [Basic Memory vs Context Mode Engine](https://www.anchorterminal.com/compare/basic-memory-vs-context-mode.md)
- [claude-mem vs Context Mode Engine](https://www.anchorterminal.com/compare/claude-mem-vs-context-mode.md)
- [Cognee vs Context Mode Engine](https://www.anchorterminal.com/compare/cognee-vs-context-mode.md)
- [Context Mode Engine vs Agent Platform Memory Bank](https://www.anchorterminal.com/compare/context-mode-vs-google-memory-bank.md)
- [Context Mode Engine vs Graphicle](https://www.anchorterminal.com/compare/context-mode-vs-graphicle.md)
- [Context Mode Engine vs Graphiti](https://www.anchorterminal.com/compare/context-mode-vs-graphiti.md)
- [Context Mode Engine vs Hindsight](https://www.anchorterminal.com/compare/context-mode-vs-hindsight.md)
- [Context Mode Engine vs Honcho](https://www.anchorterminal.com/compare/context-mode-vs-honcho.md)
- [Context Mode Engine vs Hy Memory](https://www.anchorterminal.com/compare/context-mode-vs-hy-memory.md)
- [Context Mode Engine vs Khoj](https://www.anchorterminal.com/compare/context-mode-vs-khoj.md)
- [Context Mode Engine vs LangMem](https://www.anchorterminal.com/compare/context-mode-vs-langmem.md)
- [Context Mode Engine vs Mem0 Platform + MCP](https://www.anchorterminal.com/compare/context-mode-vs-mem0.md)
- [Context Mode Engine vs MemMachine](https://www.anchorterminal.com/compare/context-mode-vs-memmachine.md)
- [Context Mode Engine vs Memori](https://www.anchorterminal.com/compare/context-mode-vs-memori.md)
- [Context Mode Engine vs MemPalace](https://www.anchorterminal.com/compare/context-mode-vs-mempalace.md)
- [Context Mode Engine vs past.dev](https://www.anchorterminal.com/compare/context-mode-vs-past-dev.md)
- [Context Mode Engine vs Supermemory API + MCP](https://www.anchorterminal.com/compare/context-mode-vs-supermemory.md)
- [Context Mode Engine vs TencentDB Agent Memory](https://www.anchorterminal.com/compare/context-mode-vs-tencentdb-agent-memory.md)
- [Context Mode Engine vs Tokenrip](https://www.anchorterminal.com/compare/context-mode-vs-tokenrip.md)
- [Context Mode Engine vs Zep](https://www.anchorterminal.com/compare/context-mode-vs-zep.md)

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Query this catalogue directly over MCP: https://www.anchorterminal.com/mcp (Streamable HTTP, no key). How: https://www.anchorterminal.com/agents/#mcp