Mem0
Mem0 stores and retrieves user context across sessions with Python and Node.js SDKs, in a managed API or self-hosted. It compresses chat history into memories and keeps memories separate by ID.
Alternatives / Supermemory
2 open-source alternatives
2 Best Open Source Supermemory Alternatives in 2026
Looking for an open source Supermemory alternative? We compared 2 open source AI memory systems by license and approach. Mem0 is a memory layer for apps and agents, and Letta is a platform for agents with persistent memory and identity.
Written by Maxime DERAME
Last updated:
Best Supermemory alternatives at a glance
| Alternative | Best for | License |
|---|---|---|
| Mem0 | Memory layer for apps and agents | Apache-2.0 |
| Letta | Agents with persistent memory | Apache-2.0 |
How we chose these Supermemory alternatives
We looked for open-source tools that store context across AI sessions. We verified each project's license, recent activity, stars, and self-hosting in its repository. See our methodology for the full criteria.
Letta
Letta builds agents that keep memory, identity, and skills across conversations, growing out of MemGPT research at UC Berkeley. It supports scheduled tasks, bring-your-own models, and local or cloud use.
License details
Mem0 and Letta are Apache-2.0.
Maintenance status
Both had commits within days of this update.
Why look for a Supermemory alternative?
Supermemory is a proprietary memory service. Open-source systems let you keep memories on your infrastructure, but you run the storage.
mem0.ai
Mem0 is an Apache-2.0 memory layer that stores and retrieves context across AI agent sessions, with Python and Node.js SDKs and a managed API or self-hosted option. It is a memory component, not a framework for building agents or a general vector database.
67.3K7.9KApache-2.0Self-hosted
Pricing: Free to self-host; managed platform is paid.
- Persistent memory across sessions
- Python and Node.js SDKs
- Managed or self-hosted
- Not a full agent framework
- Not a general-purpose vector database
docs.letta.com
Letta is an Apache-2.0 platform for building AI agents that keep memory, identity, and skills across conversations, growing out of MemGPT research at UC Berkeley. It supports scheduled tasks, bring-your-own models, and runs locally or in the cloud.
25.2K2.7KApache-2.0Self-hosted
Pricing: Free and open source; hosted cloud is paid.
- Persistent memory across sessions
- Model-agnostic
- Local or cloud
- Platform to learn
- Heavier than a plain memory library
Compare Supermemory alternatives
| Alternative | Type | License | Self-hosted | Best for |
|---|---|---|---|---|
| Mem0 | Memory layer | Apache-2.0 | Yes | Adding memory to apps |
| Letta | Agent platform | Apache-2.0 | Yes | Long-lived agents |
Which one should you choose?
Want to add memory to an app
Mem0 has SDKs and a managed or self-hosted API.
Want agents that remember
Letta agents keep memory, identity, and skills.