head to head · open source
BillionMail vs Kutt
BillionMail has 15,611 GitHub stars, 1,702 forks, 239 open issues and last shipped 3 months ago. Kutt has 11,107 stars, 1,511 forks, 80 open issues and last shipped 15 days ago. BillionMail leads on adoption by 41% (15,611 vs 11,107 stars). BillionMail is written in Go under AGPL-3.0; Kutt is written in JavaScript under MIT. BillionMail has attracted 11% as many forks as stars, Kutt 14%. Kutt 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
| BillionMail | Kutt | |
|---|---|---|
| GitHub stars | ★ 16K | ★ 11K |
| License | AGPL-3.0 | MIT |
| Written in | Go | JavaScript |
| Last push | 2026-06-11 | 2026-09-03 |
| Forks | ⑂ 1.7K | ⑂ 1.5K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick BillionMail if
- You weight community size — 16K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick Kutt if
- You want the Kutt feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches JavaScript
- You evaluated both and Kutt fits your workflow better
About BillionMail
BillionMail is an open source mail server, newsletter, and email marketing platform that runs entirely on infrastructure the operator controls. It is written in Go and released under the AGPL 3.0 license, and it lives in the self hosted email and marketing ecosystem alongside the mail transfer and delivery components it bundles, including Postfix, Dovecot, and Rspamd. The project ships as a complete stack rather than a single binary, combining a sending server, a campaign manager, and a webmail client so that one deployment covers transactional mail, promotional campaigns, and newsletters.
read the full BillionMail overview →
About Kutt
Kutt is a free, MIT licensed, self hosted URL shortener written in JavaScript for individuals, teams, and organisations that want branded short links on their own infrastructure rather than a rented hosted service.
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Frequently asked questions
Is BillionMail or Kutt more popular?
BillionMail has 15,611 GitHub stars and Kutt has 11,107. BillionMail has the larger community by that measure.
Are BillionMail and Kutt free?
Both are open source. BillionMail is licensed under AGPL-3.0 and Kutt under MIT. Neither carries a licence fee.
What is the difference between BillionMail and Kutt?
BillionMail is written in Go and Kutt in JavaScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, BillionMail or Kutt?
Choose BillionMail if you want the larger community (15,611 stars) or its AGPL-3.0 licence terms. Choose Kutt if its feature set, stack or MIT licence fits better. Both are self-hostable.