Persistent memory for agents: the file conventions, the portable format, the capture plugins, and the hosted and self-hostable services, from graph pipelines to temporal stores.
- claude-mem - the 94k-star plugin that captures coding-agent sessions, compresses them with your tokens, and reinjects the context.
- Cognee - the Apache-2.0 graph-memory pipeline with the whole engine self-hostable and a flat per-token cloud.
- Engrim - the local-first SQLite episodic memory engine for multiple AI CLIs on one machine, provenance-first, new this week.
- File-based agent memory - the CLAUDE.md and AGENTS.md conventions, memory as plain markdown files.
- Letta - the MemGPT creators’ memory-first platform, agent plus cloud tier.
- mem0 - the hosted and self-hostable memory layer across vector, graph, and key-value backends.
- Memoryfields - Cal Paterson’s portable memory-as-file-format spec, markdown pages plus a deletable vector index, the files-over-pipelines argument in RFC form.
- Zep - temporal knowledge graphs where contradictions invalidate old facts.
Its members are compared on shared rows in the Memory Feature Matrix.
Changes #
- 2026-08-24 - Added File-based agent memory.
- 2026-08-24 - Added Letta.
- 2026-08-24 - Added mem0.
- 2026-08-24 - Added Zep.
- 2026-08-26 - Added Cognee.
- 2026-08-30 - Added claude-mem.
- 2026-09-04 - Added Memoryfields.
- 2026-09-10 - Added Engrim.