The Best Authenticator Apps in 2026
Picking the right authenticator app is more important than most people realise. The app stores your 2FA secrets — if you lose access to it, you could be locked out of every account you've secured. Here's an honest comparison of the top options.
Quick Comparison
| App | Platform | Cloud Backup | Open Source | Best For |
|---|---|---|---|---|
| Google Authenticator | iOS, Android | Yes (Google account) | No | Casual users already in the Google ecosystem |
| Authy | iOS, Android, Desktop | Yes (Authy cloud) | No | Multi-device users |
| Microsoft Authenticator | iOS, Android | Yes (Microsoft account) | No | Microsoft/Office 365 users |
| Bitwarden Authenticator | iOS, Android | Yes (Bitwarden vault) | Yes | Privacy-focused users with Bitwarden |
| Aegis (Android) | Android only | Manual export | Yes | Privacy-focused Android users |
| Raivo (iOS) | iOS only | iCloud | Yes | Privacy-focused iPhone users |
| 2FA Fast (Browser) | Any browser | None needed | Soon | Quick code generation, no app required |
1. Google Authenticator
Best for: Users already in the Google ecosystem who want a simple setup.
Google Authenticator is the most widely known authenticator app. In 2023, Google added optional cloud backup to your Google account, a major improvement over the previous app-only storage.
Pros
- Simple, clean interface, easy for beginners
- Optional Google account cloud sync (added 2023)
- Widely supported: if a site says "scan with Google Authenticator," any TOTP app works
Cons
- Cloud backup stores secrets in your Google account, a high-value attack target
- No desktop app
- No PIN/password protection on the app itself
- Closed source cannot be independently audited
2. Authy
Best for: Users who want multi-device sync and desktop access.
Authy was the first major authenticator to offer cloud backup and desktop apps. It encrypts your secrets before syncing them to Authy's servers using a password only you know.
Pros
- Available on iOS, Android, Windows, macOS, and Linux
- Encrypted cloud backup with a master password
- PIN and biometric app protection
- Multi-device support
Cons
- Requires a phone number for account creation (privacy concern)
- Closed source
- Your secrets depend on Authy's servers remaining operational
- Removed desktop apps for new users (phasing out)
3. Microsoft Authenticator
Best for: Microsoft 365 / Azure AD users and enterprises.
Microsoft Authenticator excels for Microsoft accounts with passwordless login. For non-Microsoft TOTP accounts, it works fine but lacks some features compared to competitors.
Pros
- Passwordless login for Microsoft accounts
- Encrypted cloud backup to Microsoft account
- Number matching for push notifications (reduces MFA fatigue attacks)
Cons
- Exporting/migrating secrets is difficult
- Closed source
- The interface is cluttered for non-Microsoft users
4. Bitwarden Authenticator
Best for: Privacy-focused users already using Bitwarden as a password manager.
Bitwarden released a standalone authenticator app in 2024. It's open source, stores secrets locally, and optionally syncs to your Bitwarden vault.
Pros
- Fully open source and independently audited
- Optional sync with Bitwarden vault (end-to-end encrypted)
- Free
- Export functionality
Cons
- Newer app, smaller community
- Requires a Bitwarden account for cloud sync
5. Aegis (Android)
Best for: Privacy-conscious Android users who want full control.
Aegis is an open-source Android authenticator that stores everything locally, encrypted with a PIN or biometrics. You export and back up your own vault, no cloud dependency.
Pros
- Fully open source (verifiable security)
- Local encrypted vault no cloud required
- Supports TOTP, HOTP, Steam Guard, and more
- Flexible backup and export
- Customisable icons and sorting
Cons
- Android only
- Manual backup responsibility. If you lose your phone and backup, you lose access
Our Recommendation
For most people, Bitwarden Authenticator or Aegis both are both open source, privacy-respecting, and give you full control over your secrets.
If you're deep in the Google ecosystem and want simplicity, Google Authenticator with cloud backup enabled is fine for everyday accounts.
Need to generate or verify a TOTP code right now without installing any app? Use our free browser-based 2FA code generator, which works on any device instantly.
Frequently Asked Questions
Can I use multiple authenticator apps at the same time?
Yes. When you scan a 2FA QR code, you can scan it with multiple apps simultaneously (or scan it once and re-add it manually using the secret key). Both apps will generate valid codes for that account.
What happens if I lose my authenticator app?
If you have cloud backup enabled, sign in to the app on a new device with your credentials. Without backup, you'll need to use the backup codes you saved during 2FA setup, or contact the service's account recovery process. This is why saving backup codes is critical.
Is it safe to store 2FA in a password manager?
Convenient but not ideal from a security standpoint, storing your password and 2FA code in the same app reduces it from two-factor to effectively one factor. Use a separate authenticator app for important accounts.
Which authenticator app is the most secure?
From a cryptographic standpoint, all TOTP apps are equally secure; the algorithm is the same. The differences are in backup security, open-source auditability, and protection against device theft. Aegis (Android) and Raivo (iOS) score highest on all three for local-first users.
