head to head · open source
KeePassDX vs webauthn4j
KeePassDX has 7,355 GitHub stars, 402 forks, 541 open issues and last shipped 2 days ago. webauthn4j has 593 stars, 99 forks, 16 open issues and last shipped 23 days ago. KeePassDX leads on adoption by 1,140% (7,355 vs 593 stars). KeePassDX is written in Kotlin under GPL-3.0; webauthn4j is written in Java under Apache-2.0. KeePassDX has attracted 5% as many forks as stars, webauthn4j 17%. KeePassDX was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (passkey, passkeys), 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
| KeePassDX | webauthn4j | |
|---|---|---|
| GitHub stars | ★ 7.4K | ★ 593 |
| License | GPL-3.0 | Apache-2.0 |
| Written in | Kotlin | Java |
| Last push | 2026-09-23 | 2026-09-02 |
| Forks | ⑂ 402 | ⑂ 99 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick KeePassDX if
- You weight community size — 7.4K stars and counting
- You want the GPL-3.0 license terms
- Your stack matches Kotlin
- You value the larger contributor base for long-term maintenance
pick webauthn4j if
- You want the webauthn4j feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Java
- You evaluated both and webauthn4j fits your workflow better
About KeePassDX
KeePassDX is a free, open source and ad free password and passkey manager for Android that keeps credentials in a single encrypted local database file in KeePass format and fills login forms through autofill and its own keyboard.
read the full KeePassDX overview →
About webauthn4j
WebAuthn4J is a portable, Apache 2.0 licensed Java library that performs server side verification of WebAuthn and passkey ceremonies, aimed at Java and Kotlin teams that need to add FIDO2 relying party support to an existing application or identity platform.
read the full webauthn4j overview →
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Frequently asked questions
Is KeePassDX or webauthn4j more popular?
KeePassDX has 7,355 GitHub stars and webauthn4j has 593. KeePassDX has the larger community by that measure.
Are KeePassDX and webauthn4j free?
Both are open source. KeePassDX is licensed under GPL-3.0 and webauthn4j under Apache-2.0. Neither carries a licence fee.
What is the difference between KeePassDX and webauthn4j?
KeePassDX is written in Kotlin and webauthn4j in Java. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, KeePassDX or webauthn4j?
Choose KeePassDX if you want the larger community (7,355 stars) or its GPL-3.0 licence terms. Choose webauthn4j if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.