Mem0

Platform

Memory layer that gives AI agents long-term memory of users

Price: Free tier, then paid
Access: API key

About

Mem0 extracts memories from conversations and retrieves them later, so agents remember users across sessions. It is a hosted platform with a free monthly quota, plus an Apache-2.0 open-source version you run with your own LLM and vector store.

What you can do with it

Remember user preferences and facts across chat sessions
Search past memories to add relevant context to a prompt
Give coding assistants shared memory through the hosted MCP server

Get started

Create an API key in the Mem0 dashboard
Add memories for a user_id, then search them

Example

curl -X POST https://api.mem0.ai/v3/memories/add/ \
  -H "Authorization: Token $MEM0_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"messages":[{"role":"user","content":"I am vegetarian and allergic to nuts."}],"user_id":"user123"}'

Details

Hosting: Hosted service, Self-hosted, Runs locally
Available in: Worldwide
Official SDKs: Python, JavaScript/TypeScript
MCP server: Remote