Mem0
By Mem0
Y Combinator-backed memory layer for AI agents and apps, Apache-2.0 with around 68,000 GitHub stars, that extracts facts from conversations, updates them as they change, and retrieves the relevant ones in later sessions so an assistant remembers each user without resending the full chat history; it runs as a Python or Node library, a self-hosted server, or a managed cloud with a free tier.
Best for
- remembering user preferences across chat sessions
- cutting tokens by retrieving memories instead of replaying history
- per-user memory in a support or sales assistant
- self-hosting agent memory for compliance reasons
- adding memory to an agent through MCP
- Oct 28, 2026Added to the automation category: Y Combinator S24 memory layer for agents and apps, Apache-2.0, roughly 68,000 GitHub stars and 640,000 weekly PyPI downloads, available as a library, a self-hosted server, or a managed cloud with a free tier. Distinct from MemPalace, which stores a person's own AI conversations locally; Mem0 is infrastructure a developer adds so an application remembers its users.
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