
mempalace
The best-benchmarked open-source AI memory system. And it's free.
The Lens
MemPalace stores your AI conversation history verbatim and searches it semantically. Every Claude session, every project file, indexed locally. The structure is a metaphor: projects become wings, topics become rooms, so you can scope searches instead of querying a flat blob. It publishes 96.6% recall on LongMemEval with no LLM in the loop, and the benchmarks are reproducible from the repo.
Install is pip plus pointing it at a directory. ChromaDB is the default backend, embeddings run on CPU with a 300MB model, no API key required. The MCP server exposes 29 tools so Claude Code can read and write the palace directly during a session.
Solo developers using Claude Code heavily: install it. The 'wake-up' command that loads relevant context for a new session is the pitch and it works. Small teams: each engineer runs their own palace, there is no shared knowledge layer yet.
The catch: it's about two weeks old. The benchmarks are real but the operational track record is not. Breaking changes will happen, and fast-growing projects attract impostor domains. The README has a scam alert for a reason.
Get tools like this every Wednesday
One featured tool, three on the radar. No fluff.
Free vs Self-Hosted vs Paid
fully free**Free and open source.** MIT license. `pip install mempalace` and you're running. ChromaDB is the default backend, all free. Embeddings run on CPU using a local model of about 300MB, no API key required. The full 96.6% recall path runs entirely offline.
**Optional paid:** None from the project. If you swap in OpenAI embeddings or use an LLM for the rerank tier, you pay those providers directly. The core retrieval path has no cloud dependency.
No Cloud tier, no paid version, no company behind it yet. That's a feature if you care about data control and a risk if you need support.
Free and open source. Runs entirely offline if you want.
License: MIT License
Use freely, including commercial. Just keep the license.
Commercial use: ✓ Yes
About
- Owner
- MemPalace (Organization)
- Stars
- 50,940
- Forks
- 6,693
Explore Further
More tools in the directory
openclaw
Your own personal AI assistant. Any OS. Any Platform. The lobster way. 🦞
367.9k ★everything-claude-code
The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.
172.6k ★ollama
Get up and running with Kimi-K2.5, GLM-5, MiniMax, DeepSeek, gpt-oss, Qwen, Gemma and other models.
170.6k ★