Aegis Authenticator Review (2026): Pros, Cons, and Alternatives

Hands-on Aegis Authenticator review: AES-256-GCM encryption, open-source, no cloud. Compare with Authy, Google Authenticator, and 2FAS.

Aegis Authenticator is an open-source, Android-only 2FA app that encrypts your one-time passwords locally using AES-256-GCM. Unlike Authy or Google Authenticator, Aegis stores nothing in the cloud – no telemetry, no accounts, no sync servers. Your vault lives entirely on your device.

This Aegis Authenticator review targets privacy-focused users who want verifiable, auditable code. Aegis is built for people who read the GitHub repo, who distrust cloud sync, and who want full control over their backup and export workflows. It supports both TOTP and HOTP tokens, plus Steam and MOTP formats.

The trade-off? It’s Android-only. iPhone users need 2FAS or Raivo OTP. But for Android users demanding local-first security, Aegis is the gold standard.

AES-256-GCM encryption and local vault

Aegis stores every token in a local, offline vault encrypted with AES-256-GCM. That’s the same standard banks and password managers use. Your secrets never touch a server – no cloud sync, no third-party risk. The vault file is a single, encrypted JSON database. You set a master password during setup; without it, the file is gibberish. This Aegis Authenticator review found no telemetry, no account creation, and zero network permissions in the app’s manifest. If your phone is lost, the encrypted vault is useless to anyone without your password. For comparison, Google Authenticator and Authy both rely on cloud infrastructure or account recovery – Aegis gives you sole control.

Biometric unlock and app lock

You can lock the entire app behind your fingerprint or face unlock. The biometric lock triggers immediately when you leave the app, not after a timeout. For extra security, pair it with a PIN or password – Aegis supports both. This means even if someone grabs your unlocked phone, they can’t swipe into your 2FA codes without authentication. The biometric data stays on-device; Aegis never sends it anywhere. It’s a simple, effective layer that most free authenticators (including Google Authenticator) still lack.

Token organization: icons, categories, and search

Aegis lets you assign custom icons and group tokens into categories like “Work,” “Personal,” or “Finance.” The search bar filters instantly across hundreds of tokens. You can switch between a list view and a tiles view – tiles show larger icons and fewer tokens per screen, useful when you have many accounts. Each token displays the issuer, account name, and remaining TOTP time. No other open-source authenticator (andOTP, FreeOTP+) offers this level of visual organization out of the box.

Backup and export with encryption

Aegis supports automatic encrypted backups to a local file. You choose the frequency: daily, weekly, or manual. The backup is encrypted with AES-256-GCM using your vault password. You can export to plaintext (unencrypted JSON) for migration, but doing so exposes all tokens. The encrypted backup file is the safer option – store it on a USB drive or encrypted cloud folder. For comparison, Authy’s backup is tied to your phone number and encrypted with a Twilio-controlled key. Aegis puts the encryption key in your hands, not a corporation’s.

Aegis Authenticator costs exactly $0. No in-app purchases, no subscriptions, no “pro” tier hidden behind a paywall. You get AES-256-GCM encryption, biometric lock, and full local control for free. The trade-off is Android-only and zero cloud sync. But that price tag comes with a question: can a free, donation-supported app survive long-term?

Aegis accepts donations via GitHub Sponsors, but that’s optional. This is the open-source monetization dilemma: developers pour thousands of hours into a tool that millions use, yet most users never contribute. Compare this to Authy’s venture-backed model or Microsoft Authenticator’s corporate funding – Aegis relies on goodwill. The project has been actively maintained since 2018, but sustainability depends on community support.

The privacy pricing trade-off. Cloud-synced apps like Authy and Microsoft Authenticator give you free backup across devices. Lose your phone? Restore from the cloud. With Aegis, you must manually encrypt and export your vault. Forget that backup, and your 2FA tokens disappear with your phone. That’s the real cost: your time and discipline. For privacy, you trade convenience.

Here’s the total cost of ownership breakdown:

• Aegis: $0 + 10 minutes/month for encrypted backups + risk of losing tokens if you skip backups
• Authy: $0 + automatic cloud backup + risk of Twilio (parent company) changing terms or shutting down
• Google Authenticator: $0 + manual backup + risk of Google’s account takeover (tied to your Google account)
• 2FAS: $0 + optional encrypted cloud backup + fewer features than Aegis

Aegis’s donation model has funded consistent updates: v3.0 added Material You theming in 2023, v3.2 introduced encrypted export in 2024. The developer, a single person (beemdeveloper), responds to GitHub issues within days. That’s impressive for free software, but it’s a fragile foundation.

For Android-only users who value local encryption, Aegis’s pricing is unbeatable. But understand the trade-off: you’re not paying with money, you’re paying with backup discipline. If you want multi-platform or cloud backup, look at Authy or 2FAS. If you want uncompromising privacy and are willing to manage your own backups, Aegis delivers more value than any paid alternative.

Step 1: Install and set up biometric lock

Get Aegis from Google Play or F-Droid. The F-Droid version updates slower but uses F-Droid’s signing keys. After install, tap the three-dot menu, go to Settings > Security & Lockscreen, and enable “Biometric unlock.” This locks your vault behind your fingerprint or face, preventing any bypass without the biometric — even if someone grabs your unlocked phone.

Step 2: Add accounts manually or via QR code

Tap the + button at the bottom. Select “Scan QR code” to capture the on-screen code from a service like Google or GitHub. If the QR fails, pick “Enter key manually” and type the “secret key” (usually a base32 string) plus the account name. Aegis supports TOTP and HOTP — it handles both without fuss.

Step 3: Import tokens from Authy, Google Authenticator, or others

This is where Aegis shines. For Google Authenticator, use the “Import from file” option — you’ll need to export a plaintext QR from GA first. For Authy, you must extract your TOTP seeds using a third-party tool on GitHub (requires a rooted phone or ADB backup). Once you have a plaintext JSON or URI list, go to Settings > Import & Export > Import from file. Aegis reads standard otpauth:// URIs and JSON exports from andOTP and FreeOTP+. No cloud accounts, no vendor lock-in.

Step 4: Organize tokens with icons and categories

Long-press any token to edit its icon — Aegis ships with 50+ brand icons (Google, GitHub, Discord). Tap the folder icon at the top to create categories like “Work,” “Personal,” or “Crypto.” You can also reorder tokens by dragging the handle on the right. The search bar at the top filters instantly, even across 100+ tokens.

Step 5: Set up encrypted backups

Go to Settings > Import & Export > Export to file. Pick a location (internal storage or a cloud folder like Syncthing). Enable “Encrypt” and choose a strong password — Aegis uses AES-256-GCM to encrypt the vault file. For automatic backups, enable “Auto export” and set a backup schedule (daily, weekly). Store the password separately; lose it, and your 2FA tokens are gone forever.

This Aegis Authenticator review shows the app respects your time and your privacy. Five steps, zero accounts, total control.

This Aegis Authenticator review wouldn’t be complete without a clear verdict on what works and what doesn’t.

What works

• Military-grade local encryption: AES-256-GCM protects your vault, and biometric lock adds a second barrier. No cloud means no cloud breaches.
• Open-source transparency: Peer-reviewed code on GitHub means no hidden telemetry or backdoors.
• Rich organization: Icons, categories, search, and tiles view make managing dozens of tokens painless.

What doesn’t

• Android-only: iOS users are locked out entirely. No desktop companion either.
• No cloud backup: Automatic encrypted exports to local storage are manual – you own the risk of losing your phone.
• Steeper learning curve: Importing from Authy or Google Authenticator requires extra steps compared to competitors like 2FAS.

Aegis isn’t for everyone – it’s Android-only and local-only. Here’s how it stacks up against the competition.

Authy

Cloud backup is convenient but encrypted end-to-end. Authy runs on iOS, Android, and desktop. You trade local-only security for multi-device sync. Full Authy review

Google Authenticator

The simplest option, but lacks encrypted backups entirely. Losing your phone means losing every token. No biometric lock, no customization. Google Authenticator review

2FAS

A strong alternative with cloud backup via Google Drive or iCloud, plus browser extensions. Slightly less customizable than Aegis but works on both platforms. 2FAS review

andOTP

Aegis’s predecessor – open-source, local-only, no longer actively maintained. Aegis is the clear successor with better encryption (AES-256-GCM) and Material You support. andOTP review

FreeOTP+

Minimalist open-source option with no backup or encryption features. Fine for one-off use but lacking for daily drivers. FreeOTP+ review

The bottom line: This Aegis Authenticator review confirms it’s the best pick for Android users who prioritize local encryption over cross-platform convenience. If you need desktop access or iOS support, go with Authy or 2FAS.

Aegis Authenticator is the definitive choice for Android users who prioritize local security over cloud convenience. This Aegis Authenticator review confirms it outclasses Google Authenticator and Authy for encryption and privacy – its AES-256-GCM vault and zero telemetry are unmatched. Use Aegis if you’re Android-only, value open-source transparency, and want full control over backups. Skip it if you need cross-platform sync or a simpler, less customizable app. For privacy-focused Android users, it’s a clear winner.

Is Aegis Authenticator safe?

Yes – Aegis is one of the most secure 2FA apps available. It stores your tokens entirely offline using AES-256 encryption, and the source code is fully open-source and audited. Unlike cloud-based alternatives, Aegis never sends your secrets to any server.

Can I use Aegis on iOS?

No – Aegis Authenticator is Android-only as of 2026. The developer has no plans for an iOS version. For iPhone users, alternatives like Raivo OTP or 2FAS offer similar offline-first security.

How do I transfer my codes from Authy to Aegis?

You must export your tokens from Authy’s desktop app, since Authy blocks direct exports from mobile. Use the Authy desktop client’s “Export Accounts” option to generate a JSON file, then import that file into Aegis. This process is manual but well-documented in Aegis’s official guide.

Does Aegis support backup to Google Drive?

Yes – Aegis supports encrypted backups directly to Google Drive. You can configure automatic backups in the app’s settings, and each backup is encrypted with a password you set. This works with Android’s backup system and keeps your 2FA codes recoverable if you lose your phone.