Authgear

Authgear is a managed authentication and SSO platform built for developers who need to handle complex identity requirements without building auth infrastructure from scratch. It covers the full range: login flows, multi-factor authentication, biometrics, Single Sign-On, and fine-grained access control, all through a low-code setup that keeps integration overhead low.

It's designed to work for both B2C products (where you're managing large volumes of end users) and B2B setups with multi-tenant hierarchies, role-based permissions, and enterprise identity providers. Real-world deployments include integrating Azure AD for internal staff while routing external users through WhatsApp OTP, or adding biometric login to mobile apps without rearchitecting the backend.

Key capabilities include:

• Multiple login methods: passwords, biometrics, phone OTP, social login, and passkeys
• SSO across services: users authenticate once and move between microservices without re-logging in
• JWT-based access control: tokens issued per request, aligned with zero-trust principles
• Granular authorization: role- and permission-based access controls tied to user context
• Centralized identity for microservices: one identity layer instead of fragmented auth per service
• MFA and 2FA: configurable second factors including biometrics and OTP