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authgear-server

Secrets & Credentials

Open source authentication platform that serves as an alternative to Auth0, Clerk, and Firebase Auth

Go Latest 2026-05-06.0 · 28d ago Security brief →

Features

  • Passwordless login via magic links or OTP (Email, SMS, WhatsApp)
  • Support for Passkeys and biometric login on mobile devices
  • Comprehensive MFA options including TOTP, SMS, Email, and adaptive policies
  • Pre‑built signup/login and account settings pages with theming support

Recent releases

View all 5 releases →
2026-05-06.0 New feature
Notable features
  • Fraud Protection screen (alpha) for blocking signup/login abuse without code
  • Site-wide Admin Portal for usage monitoring and project management
Full changelog

Highlights

Fraud Protection in the Portal (alpha). A new Fraud Protection screen lets you block abuse on signup and login flows without writing code. This is an alpha release behind a feature flag, enabled for selected projects only.

Site Admin Portal. A new site-wide admin view for monitoring usage and managing projects across your Authgear deployment.

Other changes

  • AuthUI translation overrides for the account selector and magic-link verification pages can now reference {AppName} and {ClientName}.
  • Email alerts when a project hits its SMS usage limit.
  • The Portal's Add User screen now uses the standard country-code phone input.
  • Fixed: OTP form double-submitting on fast typing in Safari.
  • Fixed: stale Admin API documentation link in the Portal.
2026-04-21.0 Mixed
Security fixes
  • Authflow cooldowns now session-scoped — closes abuse vector where users changed phone or email mid-flow to reset OTP cooldowns
Notable features
  • Usage alerts with email + usage.alert.triggered webhook before hard caps
  • Non-ASCII sender names in custom SMTP
  • Portal: Endpoint field now shows for OIDC and SAML app types
Full changelog

Highlights

  • Usage alerts for project owners. Set soft limits on your Authgear usage and get alerted before you hit a hard cap. When a threshold is crossed, Authgear emails the project owner and fires a usage.alert.triggered webhook. Catch runaway SMS, email, or MAU costs before they become billing surprises.
  • Authflow session-scoped cooldowns. Cooldowns on OTP retries used to reset when users changed the target phone number or email mid-flow. Now the cooldown sticks to the whole authflow session. Closes a real abuse vector.
  • Non-ASCII sender names in custom SMTP. Custom SMTP now accepts sender names in Chinese, Japanese, and other non-Latin scripts.
  • Smaller portal improvements. Clearer social login setup flow. The Endpoint field now shows up for OIDC and SAML app types, not just OAuth.
2026-03-17.0 New feature
Breaking changes
  • Legacy v1 Auth UI removed
Notable features
  • Customizable welcome email templates
  • Customizable admin-triggered password email templates
  • Error tracking IDs on error pages
2026-01-08.0 New feature
Notable features
  • Account valid period configuration
  • IP blocklist support
  • Temporary access tokens for Admin API

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Community & Support

Alternative to

Auth0 Clerk Firebase Auth

Beta — feedback welcome: [email protected]