head to head · open source
Bitwarden vs 2FAS
Bitwarden has 20,156 GitHub stars, 1,772 forks, 230 open issues and last shipped yesterday. 2FAS has 1,514 stars, 130 forks, 125 open issues and last shipped 3 days ago. Bitwarden leads on adoption by 1,231% (20,156 vs 1,514 stars). Bitwarden is written in C# under a custom or non-standard licence; 2FAS is written in Kotlin under GPL-3.0. Bitwarden has attracted 9% as many forks as stars, 2FAS 9%. Bitwarden 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
| Bitwarden | 2FAS | |
|---|---|---|
| GitHub stars | ★ 20K | ★ 1.5K |
| License | Custom / other | GPL-3.0 |
| Written in | C# | Kotlin |
| Last push | 2026-09-17 | 2026-09-15 |
| Forks | ⑂ 1.8K | ⑂ 130 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Bitwarden if
- You weight community size — 20K stars and counting
- You want the Custom / other license terms
- Your stack matches C#
- You value the larger contributor base for long-term maintenance
pick 2FAS if
- You want the 2FAS feature set and don't need the biggest community
- You prefer the GPL-3.0 license terms
- Your stack matches Kotlin
- You evaluated both and 2FAS fits your workflow better
About Bitwarden
Bitwarden Server is the backend infrastructure for Bitwarden client applications, and it lives in the .NET ecosystem. The repository contains the APIs, database, and core services that support secure password management for individuals and businesses.
read the full Bitwarden overview →
About 2FAS
2FAS is an open source Android application for two factor authentication, and its listing describes it as a local first 2FA authenticator and password manager. The project lives in the password and secret management ecosystem, and the repository contains the source code for the 2FAS Auth Android app, written in Kotlin and licensed under the GNU General Public License v3.0. The README presents 2FAS as an authentication method that adds a second factor, such as a one time password shown on a phone, alongside a username and password.
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Frequently asked questions
Is Bitwarden or 2FAS more popular?
Bitwarden has 20,156 GitHub stars and 2FAS has 1,514. Bitwarden has the larger community by that measure.
Are Bitwarden and 2FAS free?
Both are open source. Bitwarden has no licence declared in this registry, and 2FAS is licensed under GPL-3.0. Both are free to self-host.
What is the difference between Bitwarden and 2FAS?
Bitwarden is written in C# and 2FAS in Kotlin. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Bitwarden or 2FAS?
Choose Bitwarden if you want the larger community (20,156 stars) or its Custom / other licence terms. Choose 2FAS if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.