The best-benchmarked open-source AI memory system. And it's free.
MemPalace is a local-first AI memory system that stores conversation history verbatim and retrieves relevant passages through semantic search. It is for AI-agent users who want searchable, structured memory on their own machine, with a replaceable retrieval backend.
Latest release v3.11.0 — v3.11.0 — audit, repair and opt-in EmbeddingGemma 2 · 14 Oct 2026
2 files for Codex, OpenCode and Claude Code: mempalace AGENTS.md, mempalace CLAUDE.md — 1,943 tokens loaded in every session.
▶ MemPalace: The Tool That Makes Claude Stop Forgetting Better Stack · about MemPalace/mempalace · on YouTube → AGENTS.md A 4 tok CLAUDE.md A 1,939 tok These files are MemPalace/mempalace's own configuration — they tell Codex, OpenCode and Claude Code how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.