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MemPalace
The best-benchmarked open-source AI memory system. And it's free.
open-sourcememory-knowledge
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Commits (90d)
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+14.8k (33.3%)estimated from velocity
Overview
MemPalace stores conversation history as verbatim text and retrieves it with semantic search using a structured index organized into wings, rooms, and drawers. It features pluggable backends like ChromaDB, operates entirely locally without API calls, and achieves 96.6% R@5 raw on LongMemEval benchmarks.
Deep Analysis
Key Differentiator
Open-source local-first memory system with verbatim storage and 96.6% R@5 performance on LongMemEval benchmarks without API calls.
⚡ Capabilities
- • verbatim conversation storage
- • semantic search retrieval
- • structured memory indexing
- • pluggable backend architecture
- • local-first operation
🔗 Integrations
ChromaDBMCP (Model Context Protocol)Python packagePyPI distribution
✓ Best For
- ✓ developers building AI agents with persistent memory
- ✓ projects requiring local-first conversation history storage
- ✓ systems needing structured semantic retrieval
✗ Not Ideal For
- ✗ end-user AI applications
- ✗ summarization or paraphrasing tasks
- ✗ cloud-dependent deployments
⚠ Known Limitations
- ⚠ requires manual setup and configuration
- ⚠ Claude Code sessions expire without auto-save hooks
- ⚠ only supports text-based memory storage
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Supermemory
Memory and context engine + app that is extremely fast, scalable, and can be run fully locally. The Memory API for the AI era.
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