Auth0 Guardian vs Authgear

Auth0 Guardian is a mobile app for completing multi-factor authentication on iOS and Android. During login, users can approve a push notification on an enrolled device or enter a temporary one-time password. Guardian-generated OTPs normally remain valid for 30 seconds. The app supports multiple languages and dialects, follows the device language by default, and offers system, light, and dark themes. Users can protect it with a passcode, passphrase, or device biometrics. Organizations can use Guardian SDKs to build similar applications or add Guardian capabilities to their own apps. Push delivery can use AWS SNS, Firebase Cloud Messaging, or Apple Push Notification service. Auth0 MFA API endpoints can enforce MFA at token endpoints and manage enrolled factors. Guardian is available through the Apple App Store and Google Play Store. The free plan is available; paid plans start at 35 /mo, with a 22-day trial.

Authgear is an identity-as-a-service platform for authentication and user management in web and mobile applications. It supports sign-in with email, phone, username, password, one-time codes and magic links, along with mobile biometrics, passkeys and multi-factor authentication through SMS, email or TOTP apps. Identity provider options include Google, Apple and Azure Active Directory. It offers single sign-on across web and mobile applications, including SAML SSO for web apps.

Its user-management portal supports password resets, account locking, profile management and scheduled deletion or anonymization. Developers can use SDKs for React, React Native, Ionic, native Android, iOS and Flutter, as well as OAuth 2.0/OpenID Connect and Admin, User Import and User Export APIs. Authgear describes itself as open source and supports self-hosting; its hosted service is currently in the USA on Google Cloud Platform infrastructure. Plans include a free tier and paid service from $50/mo. The free tier includes two applications, two admin seats, one-day log retention and community support.