head to head · open source
Billion Mail vs Kutt
Billion Mail has 16,171 GitHub stars, 1,801 forks, 236 open issues and last shipped 5 months ago. Kutt has 11,188 stars, 1,519 forks, 80 open issues and last shipped 15 days ago. Billion Mail leads on adoption by 45% (16,171 vs 11,188 stars). Billion Mail is written in Go under AGPL-3.0; Kutt is written in JavaScript under MIT. Billion Mail 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
| Billion Mail | Kutt | |
|---|---|---|
| GitHub stars | ★ 16K | ★ 11K |
| License | AGPL-3.0 | MIT |
| Written in | Go | JavaScript |
| Last push | 2026-06-11 | 2026-10-19 |
| Forks | ⑂ 1.8K | ⑂ 1.5K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Billion Mail 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 Billion Mail
BillionMail 📧 An Open Source MailServer, NewsLetter, Email Marketing Solution for Smarter Campaigns [![][license shield]][license link] [![][docs shield]][docs link] [![][github release shield]][github release link] [![][github stars shield]][github stars link] English 简体中文 日本語 Türkçe What is BillionMail? BillionMail is a future open source Mail server, Email marketing platform designed to help businesses and individuals manage their email campaigns with ease. Whether you're sending newsletters, promotional emails, or transactional messages, this tool will provide full control over your email marketing efforts…
read the full Billion Mail overview →
About Kutt
Kutt.to Kutt is a modern URL shortener with support for custom domains. Create and edit links, view statistics, manage users, and more. [!WARNING] kutt.it is NOT OWNED BY US. It could be a phishing site. We had the domain but it has been deactivated by the Italian TLD registrar due to the lack of identification documents, and now it's owned by someone else. Please use kutt.to, all the previous and the future links work with this domain as well. Table of contents Key features Donations and sponsors Setup Docker API Configuration Themes and customizations Browser extensions Videos Integrations Contributing Key…
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Frequently asked questions
Is Billion Mail or Kutt more popular?
Billion Mail has 16,171 GitHub stars and Kutt has 11,188. Billion Mail has the larger community by that measure.
Are Billion Mail and Kutt free?
Both are open source. Billion Mail is licensed under AGPL-3.0 and Kutt under MIT. Neither carries a licence fee.
What is the difference between Billion Mail and Kutt?
Billion Mail 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, Billion Mail or Kutt?
Choose Billion Mail if you want the larger community (16,171 stars) or its AGPL-3.0 licence terms. Choose Kutt if its feature set, stack or MIT licence fits better. Both are self-hostable.