head to head · open source
Mem0 vs Memos
Mem0 has 65,539 GitHub stars, 7,687 forks, 742 open issues and last shipped today. Memos has 63,136 stars, 4,767 forks, 67 open issues and last shipped yesterday. Mem0 leads on adoption by 4% (65,539 vs 63,136 stars). Mem0 is written in Python under Apache-2.0; Memos is written in Go under MIT. Mem0 has attracted 12% as many forks as stars, Memos 8%. Mem0 was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Mem0 | Memos | |
|---|---|---|
| GitHub stars | ★ 66K | ★ 63K |
| License | Apache-2.0 | MIT |
| Written in | Python | Go |
| Last push | 2026-09-18 | 2026-09-17 |
| Forks | ⑂ 7.7K | ⑂ 4.8K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Mem0 if
- You weight community size — 66K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick Memos if
- You want the Memos feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Go
- You evaluated both and Memos fits your workflow better
About Mem0
Mem0 is an open source memory layer for AI agents and applications, designed to store, retrieve, and manage persistent context across interactions. It lives in the Python based AI development ecosystem and provides infrastructure that enables agents and apps to remember user preferences, conversation history, and state over time—moving beyond ephemeral chat sessions toward truly adaptive systems.
About Memos
Memos is an open source, self hosted note taking tool designed for rapid capture of short form content like daily logs, links, code snippets, and microblog style entries. It lives in the Go ecosystem and uses a Markdown native, timeline based interface. Unlike traditional note apps that enforce folders or rigid templates, Memos prioritizes speed and simplicity: users write in Markdown, attach media, and save without selecting titles or locations.
read the full Memos overview →
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Frequently asked questions
Is Mem0 or Memos more popular?
Mem0 has 65,539 GitHub stars and Memos has 63,136. Mem0 has the larger community by that measure.
Are Mem0 and Memos free?
Both are open source. Mem0 is licensed under Apache-2.0 and Memos under MIT. Neither carries a licence fee.
What is the difference between Mem0 and Memos?
Mem0 is written in Python and Memos in Go. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Mem0 or Memos?
Choose Mem0 if you want the larger community (65,539 stars) or its Apache-2.0 licence terms. Choose Memos if its feature set, stack or MIT licence fits better. Both are self-hostable.