head to head · open source
Tuta vs certstrap
Tuta has 7,925 GitHub stars, 639 forks, 1,001 open issues and last shipped yesterday. certstrap has 2,454 stars, 212 forks, 32 open issues and last shipped 8 months ago. Tuta leads on adoption by 223% (7,925 vs 2,454 stars). Tuta is written in TypeScript under GPL-3.0; certstrap is written in Go under Apache-2.0. Tuta has attracted 8% as many forks as stars, certstrap 9%. Tuta 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
| Tuta | certstrap | |
|---|---|---|
| GitHub stars | ★ 7.9K | ★ 2.5K |
| License | GPL-3.0 | Apache-2.0 |
| Written in | TypeScript | Go |
| Last push | 2026-09-19 | 2026-02-03 |
| Forks | ⑂ 639 | ⑂ 212 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Tuta if
- You weight community size — 7.9K 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 certstrap if
- You want the certstrap feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Go
- You evaluated both and certstrap fits your workflow better
About Tuta
Tuta is an open source, end to end encrypted email, calendar and contacts service for individuals and teams who need private communication to work across every device they own.
About certstrap
certstrap is a simple certificate manager written in Go that bootstraps a private certificate authority and public key infrastructure, aimed at operators and developers who need to issue TLS certificates without wrestling with openssl.
read the full certstrap overview →
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Frequently asked questions
Is Tuta or certstrap more popular?
Tuta has 7,925 GitHub stars and certstrap has 2,454. Tuta has the larger community by that measure.
Are Tuta and certstrap free?
Both are open source. Tuta is licensed under GPL-3.0 and certstrap under Apache-2.0. Neither carries a licence fee.
What is the difference between Tuta and certstrap?
Tuta is written in TypeScript and certstrap 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 certstrap?
Choose Tuta if you want the larger community (7,925 stars) or its GPL-3.0 licence terms. Choose certstrap if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.