head to head · open source
loopx vs second-brain
loopx has 5,903 GitHub stars, 559 forks, 102 open issues and last shipped today. second-brain has 643 stars, 77 forks, 1 open issues and last shipped today. loopx leads on adoption by 818% (5,903 vs 643 stars). loopx is written in Python under Apache-2.0; second-brain is written in Python under MIT. loopx has attracted 9% as many forks as stars, second-brain 12%. loopx was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (ai-agents), so they are genuine substitutes rather than adjacent tools.
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
| loopx | second-brain | |
|---|---|---|
| GitHub stars | ★ 5.9K | ★ 643 |
| License | Apache-2.0 | MIT |
| Written in | Python | Python |
| Last push | 2026-09-20 | 2026-09-20 |
| Forks | ⑂ 559 | ⑂ 77 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick loopx if
- You weight community size — 5.9K 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 second-brain if
- You want the second-brain feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and second-brain fits your workflow better
About loopx
LoopX is an open, provider neutral, local first control plane for long horizon AI agents that preserves objectives, gates, todos, evidence, quota, and handoffs across turns for developers and teams running durable, governed work on harnesses such as Codex, Claude Code, and Cursor.
read the full loopx overview →
About second-brain
Second Brain is an MIT licensed Python agentic framework that turns a machine you control into an assistant with local file intelligence, workflow automation, and LLM driven conversation across a terminal REPL, a web interface, and Telegram, aimed at developers and technical self hosters.
read the full second-brain overview →
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Frequently asked questions
Is loopx or second-brain more popular?
loopx has 5,903 GitHub stars and second-brain has 643. loopx has the larger community by that measure.
Are loopx and second-brain free?
Both are open source. loopx is licensed under Apache-2.0 and second-brain under MIT. Neither carries a licence fee.
What is the difference between loopx and second-brain?
loopx is written in Python and second-brain in Python. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, loopx or second-brain?
Choose loopx if you want the larger community (5,903 stars) or its Apache-2.0 licence terms. Choose second-brain if its feature set, stack or MIT licence fits better. Both are self-hostable.