MemPalace offers local-first, open-source AI memory
MemPalace is a free, MIT-licensed AI memory system that stores conversation history verbatim and retrieves it through semantic search without summarizing, extracting, or paraphrasing it. Its structured index organizes people, projects, and topics, while its pluggable retrieval layer supports multiple storage backends, with ChromaDB as the default. The project also provides coding-agent and Claude Code workflows. MemPalace reports a 96.6% raw R@5 score on LongMemEval without API calls, but the supplied report does not independently verify that benchmark.
MemPalace gives developers a free, MIT-licensed way to retain and search local AI conversation history while supporting alternative storage backends. Its data remains on the user’s machine unless the user opts in.
The best-benchmarked open-source AI memory system. And it's free.
MemPalace
Local-first AI memory. Verbatim storage, pluggable backend, 96.6% R@5 raw on LongMemEval — zero API calls.