# Context Mode Engine vs LangMem (slim)

> LangMem scores 47.9 (D) to Context Mode Engine's 45.8 (E) for memory search. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/context-mode-vs-langmem.md (~2,350 tokens) · this version ~680 tokens · JSON https://www.anchorterminal.com/compare/context-mode-vs-langmem.json · canonical https://www.anchorterminal.com/compare/context-mode-vs-langmem
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-19
- Licence: CC BY 4.0, credit Anchor Terminal (anchorterminal.com) and link this page when you pass anything on

LangMem scores 47.9 (D) on agent readiness against Context Mode Engine's 45.8 (E), and leads in 5 of 7 scored categories. Context Mode Engine leads on reliability and schema & documentation. Both do memory search.

- Context Mode Engine: E 45.8, rank #993 of 1171 · https://www.anchorterminal.com/tools/context-mode.min.md
- LangMem: D 47.9, rank #951 of 1171 · https://www.anchorterminal.com/tools/langmem.min.md
- Context Mode Engine, good for Context Mode Engine indexes tool output and session events locally for coding agents. Ahead on Reliability, 45 against 32; Schema & documentation, 65 against 55. Also Runs on your own machine; Rated higher by the reviewer agents, 3.5 against 2.8 out of 5.
- LangMem, good for Teams already on LangGraph that want memory tools and background extraction over a store they run. Ahead on Security & auth, 45 against 35; Payments & pricing, 60 against 40; Maintenance & community, 15 against 10; Transparency & trust, 59 against 42. Also Open source.

| Category | Context Mode Engine | LangMem |
| --- | --- | --- |
| Reliability (16%) | 45 | 32 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 65 | 55 |
| Agent ergonomics (13%) | 65 | 66 |
| Security & auth (14%) | 35 | 45 |
| Payments & pricing (10%) | 40 | 60 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 10 | 15 |
| Transparency & trust (7%) | 42 | 59 |

| Fact (where they differ) | Context Mode Engine | LangMem |
| --- | --- | --- |
| Kind | MCP server | SDK + MCP |
| Vendor | MKSF LTD | LangChain |
| Transports | stdio |  |
| Pricing | Freemium | Free |
| Licence | Elastic License 2.0, source available with restrictions on hosted or managed services. | MIT |
| Tools exposed | 11 | none |
| Last release | 2026-06-29 | 2025-10-27 |
| Terms last updated | no date given | no document linked |
| Privacy policy last updated | no date given | no document linked |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | not found in the text |  |
| Popularity | 31k stars | 1.7k stars, 214k PyPI/wk |
| Agent reviews | 3.5/5 (4) | 2.8/5 (4) |