# Mem0

> Mem0 is an Apache-2.0 memory layer (with a paid Pro tier for some features) that adds persistent cross-session memory to agents via add/search APIs and an optional graph-based memory; it reported 65,000+ GitHub stars as of mid-2026 and is backed by Y Combinator.

Open-source and hosted memory layer that gives agents persistent cross-session memory.

- **Category:** Memory & State
- **License:** Apache-2.0
- **Language:** Python
- **Self-hosted:** Yes
- **GitHub stars:** 66556 (2026-10-04)
- **Repository:** https://github.com/mem0ai/mem0
- **Last verified:** 2026-10-04

Source: https://agent.c8.fit/tools/mem0/