head to head · open source
ActivePieces vs second-brain
ActivePieces has 25,364 GitHub stars, 4,428 forks, 573 open issues and last shipped yesterday. second-brain has 678 stars, 87 forks, 1 open issues and last shipped 1 months ago. ActivePieces leads on adoption by 3,641% (25,364 vs 678 stars). ActivePieces is written in TypeScript under a custom or non-standard licence; second-brain is written in Python under MIT. ActivePieces has attracted 17% as many forks as stars, second-brain 13%. ActivePieces was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (ai-agent-tools, 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
| ActivePieces | second-brain | |
|---|---|---|
| GitHub stars | ★ 25K | ★ 678 |
| License | Custom / other | MIT |
| Written in | TypeScript | Python |
| Last push | 2026-11-04 | 2026-09-26 |
| Forks | ⑂ 4.4K | ⑂ 87 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ActivePieces if
- You weight community size — 25K stars and counting
- You want the Custom / other license terms
- Your stack matches TypeScript
- 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 ActivePieces
An open source replacement for Zapier Documentation 🌪️ Create a Piece 🖉 Deploy 🔥 Join Discord 🤯 Welcome to Activepieces All in one AI automation designed to be extensible through a type safe pieces framework written in TypeScript . When you contribute pieces to Activepieces they become automatically available as MCP servers that you can use with LLMs through Claude Desktop, Cursor or Windsurf! 🔥 Why Activepieces is Different: 💖 Loved by Everyone : Intuitive interface and great experience for both technical and non technical users with a quick learning curve. 🌐 Open Ecosystem: All pieces are open source…
read the full ActivePieces overview →
About second-brain
Quick install Sponsor Atlas Cloud is a full modal AI inference platform that gives developers a single AI API to access video generation, image generation, and LLM APIs. Instead of managing multiple vendor integrations, you connect once and get unified access to 300+ curated models across all modalities. Check out Atlas Cloud's new coding plan promotion for more budget friendly API access: Second Brain Example For an example of what Second Brain can do, visit It's an interactive art exhibition. Head to Head Evaluation Second Brain performs higher than OpenClaw and Hermes on harness bench, which measures "model…
read the full second-brain overview →
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Frequently asked questions
Is ActivePieces or second-brain more popular?
ActivePieces has 25,364 GitHub stars and second-brain has 678. ActivePieces has the larger community by that measure.
Are ActivePieces and second-brain free?
Both are open source. ActivePieces has no licence declared in this registry, and second-brain is licensed under MIT. Both are free to self-host.
What is the difference between ActivePieces and second-brain?
ActivePieces is written in TypeScript 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, ActivePieces or second-brain?
Choose ActivePieces if you want the larger community (25,364 stars) or its Custom / other licence terms. Choose second-brain if its feature set, stack or MIT licence fits better. Both are self-hostable.