head to head · open source
Tuta vs certspotter
Tuta has 8,110 GitHub stars, 653 forks, 1,001 open issues and last shipped 2 days ago. certspotter has 1,197 stars, 104 forks, 18 open issues and last shipped 7 days ago. Tuta leads on adoption by 578% (8,110 vs 1,197 stars). Tuta is written in TypeScript under GPL-3.0; certspotter is written in Go under MPL-2.0. Tuta has attracted 8% as many forks as stars, certspotter 9%. Tuta was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (security), 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
| Tuta | certspotter | |
|---|---|---|
| GitHub stars | ★ 8.1K | ★ 1.2K |
| License | GPL-3.0 | MPL-2.0 |
| Written in | TypeScript | Go |
| Last push | 2026-11-03 | 2026-10-29 |
| Forks | ⑂ 653 | ⑂ 104 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Tuta if
- You weight community size — 8.1K stars and counting
- You want the GPL-3.0 license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick certspotter if
- You want the certspotter feature set and don't need the biggest community
- You prefer the MPL-2.0 license terms
- Your stack matches Go
- You evaluated both and certspotter fits your workflow better
About Tuta
Tuta Mail makes encryption easy Tuta Mail is the secure email service with built in end to end encryption that enables you to communicate securely with anyone on all your devices. Forum for bug reports/feature requests: Roadmap: Issue and feature tracker: Please submit your feature requests via Reddit or via support mail. Web client • iOS App Store • Desktop Client Translating Tuta See TRANSLATING.md Building See BUILDING.md. Developing Tuta See HACKING.md. Contribution policy This project does not accept contributions or bug reports produced, in part or in full, with assistance of large language models…
About certspotter
Cert Spotter Certificate Transparency Monitor Open Source Edition Cert Spotter is a Certificate Transparency log monitor from SSLMate that alerts you when an SSL/TLS certificate is issued for one of your domains. Cert Spotter is easier to use than other open source CT monitors, since it does not require a database. It's also more robust, since it uses a special certificate parser that ensures it won't miss certificates. Cert Spotter is available as a hosted service by SSLMate that also provides monitoring for expiring and incorrectly installed certificates, Slack notifications, and a Web dashboard for tracking…
read the full certspotter overview →
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Frequently asked questions
Is Tuta or certspotter more popular?
Tuta has 8,110 GitHub stars and certspotter has 1,197. Tuta has the larger community by that measure.
Are Tuta and certspotter free?
Both are open source. Tuta is licensed under GPL-3.0 and certspotter under MPL-2.0. Neither carries a licence fee.
What is the difference between Tuta and certspotter?
Tuta is written in TypeScript and certspotter in Go. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Tuta or certspotter?
Choose Tuta if you want the larger community (8,110 stars) or its GPL-3.0 licence terms. Choose certspotter if its feature set, stack or MPL-2.0 licence fits better. Both are self-hostable.