#55th of 12 in Memory
Mem0
Memory layer for agents with a self-hosted server, SDKs and CLI
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- Stars
- 67k
- License
- Apache-2.0
- Last commit
- Oct 2026
- Last release
- Sep 2026
- Language
- Python
Overview
Mem0 adds long-term memory to assistants and agents at user, session and agent level. It ships as a Python and npm library, a self-hosted server via docker compose (dashboard on port 3000, auth on by default) and a managed cloud. Memories are extracted by an LLM (gpt-5-mini by default) and retrieved with semantic, BM25 and entity matching; an optional NLP extra adds spaCy for hybrid search.
Who it is for: Developers adding persistent user memory to chatbots and agents
Strengths
- Library, self-hosted server with dashboard and API keys, or managed platform share one API
- Multi-signal retrieval: semantic, BM25 keyword and entity matching with temporal reasoning
- CLI and agent skills for Claude Code, Codex, Cursor and others
- Apache-2.0; evaluation framework is open source
Weaknesses
- Requires an LLM for extraction; OpenAI gpt-5-mini and text-embedding-3-small are the defaults
- Benchmark scores reflect the managed platform, not the open-source SDK
- Self-hosted server exposes only teasers of advanced features; all included in cloud
- Hybrid search recommends at least a 600M-parameter embedding model
What it needs
- no GPU
- Models: OpenAI gpt-5-mini (default), OpenAI text-embedding-3-small (default), other providers per docs
- port 3000
Also in Memory
See all 12| Rank | Project | Score |
|---|---|---|
| 1 | hindsightAgent memory server with retain, recall and reflect operations | 78 out of 100 |
| 2 | MemPalaceLocal verbatim memory for coding agents on ChromaDB with 45 MCP tools | 77 out of 100 |
| 3 | agentmemoryPersistent memory server for coding agents, exposed over MCP and REST | 75 out of 100 |
| #4 | OpenVikingContext database exposing agent memory, knowledge and skills as a filesystem | 74 out of 100 |
| #6 | CogneeMemory engine that turns documents and code into a knowledge graph | 73 out of 100 |