head to head · open source
hydra vs keepass2android
hydra has 17,553 GitHub stars, 1,609 forks, 98 open issues and last shipped 2 months ago. keepass2android has 6,236 stars, 478 forks, 1,174 open issues and last shipped 3 days ago. hydra leads on adoption by 181% (17,553 vs 6,236 stars). hydra is written in Go under Apache-2.0; keepass2android is written in C# under GPL-3.0. hydra has attracted 9% as many forks as stars, keepass2android 8%. keepass2android 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
| hydra | keepass2android | |
|---|---|---|
| GitHub stars | ★ 18K | ★ 6.2K |
| License | Apache-2.0 | GPL-3.0 |
| Written in | Go | C# |
| Last push | 2026-07-29 | 2026-09-17 |
| Forks | ⑂ 1.6K | ⑂ 478 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick hydra if
- You weight community size — 18K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick keepass2android if
- You want the keepass2android feature set and don't need the biggest community
- You prefer the GPL-3.0 license terms
- Your stack matches C#
- You evaluated both and keepass2android fits your workflow better
About hydra
Ory Hydra is an OpenID Certified OpenID Connect and OAuth 2.1 provider written in Go and licensed under Apache 2.0, built for teams that need standards compliant token issuance, client management, and consent flows while user accounts stay in their own existing identity system.
read the full hydra overview →
About keepass2android
Keepass2Android is a free, GPL 3.0 licensed password manager for Android that stores passwords and other sensitive information in an encrypted database file readable by KeePass 2.x and KeePassXC on desktop, making it the mobile client for people who already keep their credentials in a KeePass compatible file.
read the full keepass2android overview →
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Frequently asked questions
Is hydra or keepass2android more popular?
hydra has 17,553 GitHub stars and keepass2android has 6,236. hydra has the larger community by that measure.
Are hydra and keepass2android free?
Both are open source. hydra is licensed under Apache-2.0 and keepass2android under GPL-3.0. Neither carries a licence fee.
What is the difference between hydra and keepass2android?
hydra is written in Go and keepass2android in C#. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, hydra or keepass2android?
Choose hydra if you want the larger community (17,553 stars) or its Apache-2.0 licence terms. Choose keepass2android if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.