Best Site for 2FA App
Summary
The best 2FA app is Aegis if you're on Android — open-source, encrypted local backups, no cloud account required. Ente Auth is the cross-platform pick that emerged after Raivo's developer abandoned the project; Ente acquired and continues it. 2FAS is the user-friendly multi-platform alternative. We explicitly do not recommend Authy any more — Twilio sunset the desktop apps in April 2024 with limited migration paths. Google Authenticator added cloud backup but the encryption design has been criticized. Most listicles haven't updated to reflect any of this.
Top 5 at a glance
| # | Site | Best for | Price |
|---|---|---|---|
| 1 | Aegis Authenticator | Open-source Android 2FA with encrypted local backups | Free and open-source |
| 2 | Ente Auth | Cross-platform 2FA with end-to-end encrypted sync | Free for basic use; paid Ente plans for storage of other content |
| 3 | 2FAS | User-friendly multi-platform with browser-extension companion | Free; paid plans for additional features |
| 4 | Bitwarden Authenticator | Standalone authenticator from the Bitwarden team | Free |
| 5 | Google Authenticator | Default option already installed for many users | Free |
Detailed rankings
Aegis Authenticator
Open-source Android 2FA with encrypted local backups
The default for Android users. The open-source plus local-encrypted-backup combination is the right architecture for 2FA.
Pros
- Open-source under GPL
- Encrypted local backups you control
- No account required
- Strong customization including icons and grouping
Cons
- Android only — no iOS, desktop, or web
- Backup is your responsibility — set it up correctly or risk loss
- Less polished than commercial alternatives
Price: Free and open-source
Sources: getaegis.app, github.com
Ente Auth
Cross-platform 2FA with end-to-end encrypted sync
The right cross-platform pick after the Authy desktop sunset. Open-source plus E2E sync is rare in this category.
Pros
- End-to-end encrypted sync across iOS, Android, desktop, web
- Open-source clients
- Continued the work of Raivo after its original developer abandoned it
- Strong cryptographic design from the Ente team's photo product
Cons
- Cross-platform sync requires an Ente account
- Newer entrant than Aegis or Authy
- Cloud sync is optional but signed up to by default in some flows
Price: Free for basic use; paid Ente plans for storage of other content
Sources: ente.io, github.com
2FAS
User-friendly multi-platform with browser-extension companion
The right pick when you want polished UX and cross-platform without picking a specific ecosystem.
Pros
- iOS and Android with optional desktop browser extension
- Polished UX for non-technical users
- Cloud backup with end-to-end encryption
- Reasonable open-source posture
Cons
- Browser extension companion is the desktop story, not a native app
- Some advanced features paid
- Smaller community than Aegis
Price: Free; paid plans for additional features
Sources: 2fas.com
Bitwarden Authenticator
Standalone authenticator from the Bitwarden team
Worth considering if you already use Bitwarden. The standalone authenticator inherits the credibility of the password manager.
Pros
- Open-source from a credible privacy-aware company
- Free with no account requirement for the standalone version
- Strong if you already use Bitwarden for passwords
Cons
- Newer than the others — less feature-rich
- Standalone version separate from the Bitwarden password manager integration
Price: Free
Sources: bitwarden.com
Google Authenticator
Default option already installed for many users
Functional but no longer the right recommendation. The cloud-backup criticism plus the closed-source code make Aegis and Ente better choices.
Pros
- Available on iOS and Android
- Familiar from many account setup flows
- Added cloud backup in 2023
Cons
- Cloud backup design has been criticized for not being end-to-end encrypted by default — security researchers flagged this when the feature launched
- Closed-source
- Less feature-rich than Aegis or Ente
Price: Free
Sources: support.google.com
How we chose
- Open-source code with active third-party review.
- Backup model — local encrypted exports preferred over forced cloud.
- Cross-platform availability across the devices you actually use.
- Vendor stability — has the app been discontinued or migrated without notice?
- Account requirements — no account requirement preferred.
- Migration ease from competitors when switching.
Frequently asked questions
What happened to Authy?
Twilio acquired Authy and progressively reduced its consumer focus. In April 2024 they discontinued the Authy desktop applications, leaving users with limited migration paths. The mobile app continues but the brand has lost trust for many users. Most listicles still recommend Authy without flagging the desktop discontinuation.
What was the Google Authenticator cloud-backup issue?
When Google added cloud backup in 2023, security researchers including Mysk discovered that the backups appeared to not be end-to-end encrypted, meaning Google could in principle access the 2FA seeds. Google added end-to-end encryption optionally but the default behavior at launch raised credible concerns about the design choice.
How do I migrate from Authy or Google Authenticator?
You typically need to re-enroll each account in the new authenticator app. Some accounts let you scan a new QR code while keeping the old one active until you've verified the new one works. For accounts that don't support this, you'll have a window where you disable the old code, generate a new one, and re-enroll.
Should I use my password manager's built-in 2FA?
There are tradeoffs. Storing 2FA codes in the same vault as passwords reduces the second factor to a question of vault access. For high-security accounts (banking, primary email), keeping 2FA in a separate app like Aegis or Ente preserves the second-factor independence.
What about hardware security keys?
Yubikeys and equivalent hardware keys are the strongest second factor available. For your highest-value accounts, hardware keys beat any app-based 2FA. The apps in this ranking are the right choice for the long tail of accounts that don't support hardware keys.