head to head · open source
Twenty vs sellbird
Twenty has 60,606 GitHub stars, 10,006 forks, 205 open issues and last shipped yesterday. sellbird has 4,775 stars, 1,013 forks, 30 open issues and last shipped yesterday. Twenty leads on adoption by 1,169% (60,606 vs 4,775 stars). Twenty is written in TypeScript under a custom or non-standard licence; sellbird is written in Python under AGPL-3.0. Twenty has attracted 17% as many forks as stars, sellbird 21%. Twenty 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
| Twenty | sellbird | |
|---|---|---|
| GitHub stars | ★ 61K | ★ 4.8K |
| License | Custom / other | AGPL-3.0 |
| Written in | TypeScript | Python |
| Last push | 2026-11-07 | 2026-11-07 |
| Forks | ⑂ 10K | ⑂ 1.0K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Twenty if
- You weight community size — 61K 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 sellbird if
- You want the sellbird feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Python
- You evaluated both and sellbird fits your workflow better
About Twenty
The 1 Open Source CRM Website · Documentation · Roadmap · Discord · Figma Why Twenty Twenty gives technical teams the building blocks for a custom CRM that meets complex business needs and quickly adapts as the business evolves. Twenty is the CRM you build, ship, and version like the rest of your stack. Learn more about why we built Twenty Installation Cloud The fastest way to get started. Sign up at twenty.com and spin up a workspace in under a minute, with no infrastructure to manage and always up to date. Build an app Scaffold a new app with the Twenty CLI: Define objects, fields, and views as code: Then ship…
read the full Twenty overview →
About sellbird
The open source outreach platform that runs on your Claude or ChatGPT plan. Sellbird finds companies that need what you sell, finds the person who decides, checks their email address, writes each one a personal cold email, sends it and handles the replies. It runs on your own machine, and by default nothing goes out until you approve it. Harvey is now Sellbird. Same project, same history, new name. Already running Harvey? Your setup carries over: see Upgrading from Harvey. Prefer not to run it yourself? sellbird.ai is the hosted version, with sending domains, inboxes and warmup set up for you. It's in early…
read the full sellbird overview →
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Frequently asked questions
Is Twenty or sellbird more popular?
Twenty has 60,606 GitHub stars and sellbird has 4,775. Twenty has the larger community by that measure.
Are Twenty and sellbird free?
Both are open source. Twenty has no licence declared in this registry, and sellbird is licensed under AGPL-3.0. Both are free to self-host.
What is the difference between Twenty and sellbird?
Twenty is written in TypeScript and sellbird 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, Twenty or sellbird?
Choose Twenty if you want the larger community (60,606 stars) or its Custom / other licence terms. Choose sellbird if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.