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pi-authenticator

Free#67 of 111 in Authenticator Apps

pi-authenticator: A free, open-source mobile MFA app with OTP codes, push approvals, and privacyIDEA integration. Ranked #67 of 111 in Authenticator Apps by our editors (3.0/10); pricing: Free plan; best for privacyIDEA users wanting open-source mobile MFA.

3.0/10Editor score
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pi-authenticator3.0 Try pi-authenticator

At a glance

  • Editor score
    3.0 / 10
  • Pricing
    Free plan
  • Best for
    PrivacyIDEA users wanting open-source mobile MFA
  • Free plan
    Yes
  • Paid from
    Free
  • Push approvals
    Yes
  • Facts checked
    21 Sep 2026
pi-authenticator screenshot

  • Where it wins

    • Free and open source on Android and iOS
    • Supports HOTP, TOTP, push approvals, and multiple hashing options
    • Imports tokens from Google Authenticator, Aegis, and 2FAS Authenticator

  • Where it doesn't

    • Primarily intended for use with privacyIDEA
    • Integrations are limited to privacyIDEA Authentication Server and Firebase
    • No desktop platform or broader ecosystem coverage is described

Our verdict on pi-authenticator

pi-authenticator is a free, open-source mobile authenticator for Android and iOS, designed primarily for people using the privacyIDEA Authentication Server. It generates HOTP and TOTP codes, supports 30- and 60-second TOTP periods, and handles push authentication approvals. The app also scans QR codes in the Google Authenticator Key URI format, making it suitable for common token enrollment workflows. Its audience is clearest when privacyIDEA is already part of an organization’s authentication setup, though it also supports standard authenticator app use.

Its strongest technical focus is the combination of token flexibility and privacyIDEA integration. Hashing support includes SHA-1, SHA-256, and SHA-512, while token imports are available from Google Authenticator, Aegis, and 2FAS Authenticator. More secure token enrollment is available with privacyIDEA, and push authentication can be configured without Firebase. Biometric or app authentication protection adds a local access control option for stored tokens. These features make pi-authenticator a practical fit for teams that want mobile MFA tied to an open-source authentication server rather than a standalone consumer app.

The trade-off is a narrow ecosystem focus. The published product details identify privacyIDEA Authentication Server and Firebase as integrations, with no broader platform coverage described beyond Android and iOS. That focus should suit privacyIDEA users who value open-source software, push approvals, and token migration options. Organizations seeking a wider range of identity-provider integrations, desktop support, or a general-purpose authenticator with broader ecosystem coverage should consider an alternative. The free model keeps adoption straightforward, with no paid tier structure involved.

Your product? Our editors can test pi-authenticator in depth and publish a review, labelled as paid · from $149/mo →

pi-authenticator pricing

Plans Free planFree Free to use — no paid tier required for the core job.
See plans on github.com

pi-authenticator fact sheet

Free planYes
Paid fromFree
Code typeTotp and hotp
Push approvalsYes
Encrypted backupNot verified
Multi-device syncNot verified
Team administrationNot verified
Supported platformsAndroid, iOS
DeploymentMobile
PlatformsiOS, Android
SupportEmail, Phone, Docs
Built forSmall business, Mid-market, Enterprise (editorial estimate)
Integrations2 integrations: privacyIDEA Authentication Server, Firebase
PricingFree plan
Websitegithub.com
Facts checked21 Sep 2026

pi-authenticator integrations

pi-authenticator lists 2 integrations on its own site.

  • privacyIDEA Authentication Server
  • Firebase

Alternatives to pi-authenticator

See all pi-authenticator alternatives →

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Featured on iTechGuides

Featured on iTechGuides — pi-authenticator 3.0/10

pi-authenticator is listed in our Authenticator Apps directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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