Microsoft Authenticator costs $6/mo.
These cost $0.
2 free alternatives to Microsoft Authenticator, checked for license, recent activity and real adoption. Each one tells you the catch, so you can switch with your eyes open.
The top-rated free, open-source replacement for Microsoft Authenticator is Aegis Authenticator (Open Source Open Source). Switching a 5-person team saves up to $360/year compared to Microsoft Authenticator's $6/mo subscription.
The catch: Community-driven open source project without dedicated enterprise SLAs.
Microsoft Authenticator vs Free Alternatives
Quick side-by-side comparison · $0/mo vs $6/mo
| Alternative | Type | License | Where It Runs | Stars | Head-to-Head |
|---|---|---|---|---|---|
| Aegis Authenticator | open source | Open Source | Local | ★ 13.5k | Microsoft Authenticator vs Aegis Authenticator → |
| 2FAS | open source | Open Source | Local | ★ 1.6k | Microsoft Authenticator vs 2FAS → |
The picks
2 open source · ranked by fit
- 01
Aegis Authenticator
open sourceOpen SourceLocal13.5knov 2026Android app for managing two-factor authentication tokens with encrypted storage, biometric unlock, flexible backups, and import/export from major 2FA apps.
The catch vs Microsoft AuthenticatorCommunity-driven open source project without dedicated enterprise SLAs.
Install, platforms & data +
- platforms
- desktopcross-platformone-click install
- install
- Clone https://github.com/beemdevelopment/Aegis or deploy with Docker Compose
- setup
- Download the native package or installer for your operating system.
- your data
- All application data lives locally on your own machine.
- checked
- 2026-11-07
- 02
2FAS
open sourceOpen SourceLocal1.6knov 2026Open-source authenticator and password manager that stores 2FA tokens and passwords locally on your device, with zero-knowledge encryption and no account required.
The catch vs Microsoft AuthenticatorCommunity-driven open source project without dedicated enterprise SLAs.
Install, platforms & data +
- platforms
- desktopcross-platformone-click install
- install
- Clone https://github.com/twofas/2fas-android or deploy with Docker Compose
- setup
- Download the native package or installer for your operating system.
- your data
- All application data lives locally on your own machine.
- checked
- 2026-11-07
Microsoft Authenticator Head-to-Head Comparisons (2027)
Side-by-side trade-off breakdowns · 2 free alternatives
Frequently Asked Questions
Direct answers · Microsoft Authenticator open-source replacements
What is the best free alternative to Microsoft Authenticator?+
The top free alternative to Microsoft Authenticator is Aegis Authenticator (open source, Open Source). Android app for managing two-factor authentication tokens with encrypted storage, biometric unlock, flexible backups, and import/export from major 2FA apps. Other popular Microsoft Authenticator replacements include 2FAS.
How much does switching from Microsoft Authenticator to a free alternative save?+
Microsoft Authenticator starts at $6/month per seat ($72/year). Switching a 5-person team to a free alternative like Aegis Authenticator saves $360 per year in software subscription fees.
Should I vibe-code or build my own Microsoft Authenticator clone from scratch?+
Our build verdict for Microsoft Authenticator is NO (use a free alternative, save the tokens). Instead of paying recurring SaaS fees for Microsoft Authenticator or rebuilding it from scratch, deploy one of the 2 battle-tested open-source alternatives like Aegis Authenticator.
What is the catch when switching from Microsoft Authenticator to Aegis Authenticator?+
Community-driven open source project without dedicated enterprise SLAs.
