MemPalace/mempalace
★ 59,643 stars
Covered in week 2026-W17 · the 2026-04 report
The best-benchmarked open-source AI memory system. And it's free.
What mempalace is
MemPalace stores your conversation history as verbatim text and retrieves it with semantic search. It does not summarize, extract, or paraphrase. The index is structured — people and projects become wings, topics become rooms, and original content lives in drawers — so searches can be scoped rather than run against a flat corpus.
From the repository README · read it on GitHub →
Transcript
AI memory systems charge 20 to $50 a month. This one runs locally for free. Mem Palace stores your entire conversation history as verbatim text, then retrieves it with semantic search. Nothing leaves your machine. No API calls, no cloud, no privacy leaks. The benchmarks are impressive. 96.6% retrieval recall on long Mem evil using raw semantic search alone, no LLM required. It gives you wings, rooms, and drawers to organize everything from Claude code sessions to project files. Star it if this saved you money.
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