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Head-to-head · Authenticator Apps

Google Authenticator vs Duo Mobile

  • Updated Oct 2026
  • Both researched from official sources
  • 5 checks side by side
Higher score Google Authenticator #2 in Authenticator Apps 9.2/10 Free plan Free plan✓ 2 of 4 features Visit site
Duo Mobile #5 in Authenticator Apps 8.9/10 Free plan · 30-day trial Free planFree trial✓ 3 of 4 features Visit Duo Mobile

Google Authenticator leads on 0 checks, Duo Mobile on 0, and 5 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreGoogle Authenticator · 9.2/10
  • Free planboth
  • Free trialonly Duo Mobile
  • Most featuresDuo Mobile · 3 of 4

Google Authenticator scores higher on our rubric for authenticator apps: 9.2 against 8.9 out of 10; our editors rank them #2 and #5.

On code type, Google Authenticator gives you Totp and hotp where Duo Mobile offers Totp.

Google Authenticator is the better fit for users wanting a simple, established free option. Duo Mobile is the better fit for teams needing push MFA plus third-party OTPs.

  • Google Authenticator fits best

    Users wanting a simple, established free option

  • Duo Mobile fits best

    Teams needing push MFA plus third-party OTPs

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Google Authenticator 9.2/10 Visit ↗ Duo Mobile 8.9/10 Visit ↗
At a glance
Editor score 9.2 8.9
Ranking #2 in Authenticator Apps #5 in Authenticator Apps
Best for Users wanting a simple, established free option Teams needing push MFA plus third-party OTPs
Pricing model Free Free plan + paid
Starting price Free plan $3/user/mo
Free plan ✓ ✓
Free trial — 30 days
Deployment Mobile Mobile
Platforms Android, iOS iOS, Android
Support Email, Docs Docs
Built for Solo, Small business Solo, Small business, Mid-market, Enterprise
Features Google Authenticator 2/4 · Duo Mobile 3/4
Push approvals Not checked yet ✓ (best)
Encrypted backup ✓ ✓
Multi-device sync ✓ (best) Not checked yet
Team administration Not checked yet ✓ (best)
Specs
Code type Totp and hotp Totp
Supported platforms Android, iOS iOS, Android
Our review
Pros
  • Generates TOTP and HOTP codes without internet or cellular access
  • Encrypted synchronization across devices with Google Account support
  • QR-code setup and transfers simplify account migration
  • Supports one-tap push approvals plus TOTP and HOTP codes
  • Encrypted backup, Instant Restore, and Security Checkup add useful safeguards
  • Administrative device enrollment and management support team deployments
Cons
  • Works only with websites and apps that support authenticator codes
  • Requires device authentication to use Privacy Screen protection
  • QR transfers require access to both the source and destination devices
  • Backup and restore depend on operating system and device settings
  • Backup restoration does not work across platforms
  • Administrative controls are provided through the broader Duo service
Our verdict

Google Authenticator is a free mobile app for generating one-time verification codes for websites and apps that support authenticator-based two-step verification. It supports time-based and counter-based codes, works offline, and is…

Read the review →

Duo Mobile is a smartphone authenticator for individuals and organizations using Cisco Duo. It combines one-tap push approval and denial with TOTP and HOTP passcode generation, covering both Duo-protected applications and compatible…

Read the review →
  1. Google AuthenticatorAuthenticator Apps 9.2Free plan
  2. Duo MobileAuthenticator Apps 8.9Free plan · 30-day trial

Strengths and trade-offs

  • Google Authenticator — where it wins

    • Generates TOTP and HOTP codes without internet or cellular access
    • Encrypted synchronization across devices with Google Account support
    • QR-code setup and transfers simplify account migration

    Where it doesn't

    • Works only with websites and apps that support authenticator codes
    • Requires device authentication to use Privacy Screen protection
    • QR transfers require access to both the source and destination devices

  • Duo Mobile — where it wins

    • Supports one-tap push approvals plus TOTP and HOTP codes
    • Encrypted backup, Instant Restore, and Security Checkup add useful safeguards
    • Administrative device enrollment and management support team deployments

    Where it doesn't

    • Backup and restore depend on operating system and device settings
    • Backup restoration does not work across platforms
    • Administrative controls are provided through the broader Duo service
  • Google Authenticator9.2/10 · Free plan

    A free, straightforward authenticator with offline codes, sync, and QR transfers.

    Visit siteFull verdict →
  • Duo Mobile8.9/10 · Free plan · 30-day trial

    A flexible authenticator for Duo push approvals, third-party OTPs, and team device management.

    Visit Duo MobileFull verdict →

More comparisons

All authenticator apps comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update