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Head-to-head · Authenticator Apps

Proton Authenticator vs Zoho OneAuth

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score Proton Authenticator #1 in Authenticator Apps 9.4/10 Free plan Free plan✓ 2 of 4 features Visit Proton
Zoho OneAuth #7 in Authenticator Apps 8.7/10 Free plan Free plan✓ 3 of 4 features Visit Zoho OneAuth

Proton Authenticator leads on 0 checks, Zoho OneAuth on 0, and 4 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreProton Authenticator · 9.4/10
  • Free planboth
  • Most featuresZoho OneAuth · 3 of 4

Proton Authenticator scores higher on our rubric for authenticator apps: 9.4 against 8.7 out of 10; our editors rank them #1 and #7.

Proton Authenticator is the better fit for users wanting a mature free cross-platform option. Zoho OneAuth is the better fit for zoho organizations needing MFA and SSO.

  • Proton Authenticator fits best

    Users wanting a mature free cross-platform option

  • Zoho OneAuth fits best

    Zoho organizations needing MFA and SSO

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Side by side

Feature Proton Authenticator 9.4/10 Visit ↗ Zoho OneAuth 8.7/10 Visit ↗
At a glance
Editor score 9.4 8.7
Ranking #1 in Authenticator Apps #7 in Authenticator Apps
Best for Users wanting a mature free cross-platform option Zoho organizations needing MFA and SSO
Pricing model Free Free
Starting price Free Free
Free plan ✓ ✓
Free trial — —
Deployment Desktop, Mobile Cloud, Desktop, Mobile
Platforms Windows, macOS, Linux, iOS, Android Windows, macOS, iOS, Android
Support Live chat, Tickets, Docs Docs
Built for Solo, Small business Solo, Small business, Mid-market, Enterprise
Features Proton Authenticator 2/4 · Zoho OneAuth 3/4
Push approvals Not checked yet ✓ (best)
Encrypted backup ✓ ✓
Multi-device sync ✓ ✓
Team administration Not checked yet Not checked yet
Specs
Code type Totp Totp
Supported platforms iOS, Android, macOS, Windows, Linux iOS, Android, Windows, macOS
Our review
Pros
  • Free on iOS, Android, macOS, Windows, and Linux
  • End-to-end encrypted synchronization and encrypted backups
  • Imports tokens and supports offline six-digit TOTP codes
  • Free MFA for Zoho and third-party accounts
  • Encrypted backup, passphrase recovery, and multi-device sync
  • Zoho Directory support for organization-wide MFA
Cons
  • Focused on time-based one-time passwords rather than broader authentication methods
  • Cross-device synchronization requires signing in to a Proton Account
  • Designed for individuals rather than broader organizational administration
  • Push approvals are for Zoho sign-ins
  • Backup and sync require a Zoho account and passphrase
  • Organization-wide MFA is tied to Zoho Directory
Our verdict

Proton Authenticator is a free, open-source app for individuals who need to generate and manage two-factor authentication codes. It creates six-digit time-based one-time passwords and supports QR-code scanning or manual secret-key entry.…

Read the review →

Zoho OneAuth is a free multi-factor authentication app for individuals and organizations securing Zoho and third-party online accounts. It generates time-based one-time passwords for 2FA accounts, supports push approvals for Zoho sign-ins,…

Read the review →
  1. Proton AuthenticatorAuthenticator Apps 9.4Free plan
  2. Zoho OneAuthAuthenticator Apps 8.7Free plan

Strengths and trade-offs

  • Proton Authenticator — where it wins

    • Free on iOS, Android, macOS, Windows, and Linux
    • End-to-end encrypted synchronization and encrypted backups
    • Imports tokens and supports offline six-digit TOTP codes

    Where it doesn't

    • Focused on time-based one-time passwords rather than broader authentication methods
    • Cross-device synchronization requires signing in to a Proton Account
    • Designed for individuals rather than broader organizational administration

  • Zoho OneAuth — where it wins

    • Free MFA for Zoho and third-party accounts
    • Encrypted backup, passphrase recovery, and multi-device sync
    • Zoho Directory support for organization-wide MFA

    Where it doesn't

    • Push approvals are for Zoho sign-ins
    • Backup and sync require a Zoho account and passphrase
    • Organization-wide MFA is tied to Zoho Directory

More comparisons

All authenticator apps comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update