head to head · open source
Aegis Authenticator vs 2FAS
Aegis Authenticator has 13,448 GitHub stars, 614 forks, 120 open issues and last shipped 2 months ago. 2FAS has 1,561 stars, 133 forks, 125 open issues and last shipped 3 days ago. Aegis Authenticator leads on adoption by 761% (13,448 vs 1,561 stars). Aegis Authenticator is written in Java under GPL-3.0; 2FAS is written in Kotlin under GPL-3.0. Aegis Authenticator has attracted 5% as many forks as stars, 2FAS 9%. 2FAS 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
| Aegis Authenticator | 2FAS | |
|---|---|---|
| GitHub stars | ★ 13K | ★ 1.6K |
| License | GPL-3.0 | GPL-3.0 |
| Written in | Java | Kotlin |
| Last push | 2026-09-06 | 2026-10-31 |
| Forks | ⑂ 614 | ⑂ 133 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Aegis Authenticator if
- You weight community size — 13K stars and counting
- You want the GPL-3.0 license terms
- Your stack matches Java
- 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 Aegis Authenticator
Aegis Authenticator Aegis Authenticator is a free, secure and open source 2FA app for Android. It aims to provide a secure authenticator for your online services, while also including some features missing in existing authenticator apps, like proper encryption and backups. Aegis supports HOTP and TOTP, making it compatible with thousands of services. For a list of frequently asked questions, please check out the FAQ. The security design of the app and the vault format is described in detail in this document. Features Free and open source Secure The vault is encrypted (AES 256 GCM), and can be unlocked with…
read the full Aegis Authenticator overview →
About 2FAS
Open Source 2FAS for Android This is the official Android app for the Open Source 2FAS project. What is 2FAS? 2FAS (Two Factor Authentication Service) is a user authentication method that provides an additional layer of security for online accounts. In addition to a username and password, 2FAS uses a second factor, such as a one time password (OTP) shown on a user's phone, to verify a user's identity. This helps prevent unauthorized access to accounts, even if a password is compromised. Features Support for time based one time passwords (TOTP) and HMAC based on time passwords (HOTP) Compatible with any service…
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Frequently asked questions
Is Aegis Authenticator or 2FAS more popular?
Aegis Authenticator has 13,448 GitHub stars and 2FAS has 1,561. Aegis Authenticator has the larger community by that measure.
Are Aegis Authenticator and 2FAS free?
Both are open source. Aegis Authenticator is licensed under GPL-3.0 and 2FAS under GPL-3.0. Neither carries a licence fee.
What is the difference between Aegis Authenticator and 2FAS?
Aegis Authenticator is written in Java 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, Aegis Authenticator or 2FAS?
Choose Aegis Authenticator if you want the larger community (13,448 stars) or its GPL-3.0 licence terms. Choose 2FAS if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.