FusionAuth Authentication Platform

FusionAuth is a customer identity and access management platform designed for developers who need to embed login, registration, password management, and user profiling directly into their applications. Unlike hosted-only auth providers, this system can be deployed on any infrastructure: Docker containers, Kubernetes clusters, virtual machines, bare metal servers, or managed cloud instances, giving organizations complete control over where user data resides. The platform handles email and password authentication with configurable password policies, breach detection through HaveIBeenPwned integration, and brute-force protection with rate limiting. Social login supports over thirty providers including Google, Apple, GitHub, and Microsoft through OAuth 2.0 and OpenID Connect flows. Multi-factor authentication offers TOTP authenticator apps, SMS codes, and hardware security keys following WebAuthn standards. Single sign-on enables one login session across multiple applications and domains, with SAML 2.0 support for enterprise integrations. The system includes a configurable theming engine that lets designers match login pages to brand guidelines using HTML templates and CSS, or developers can build fully custom UI using the provided APIs. Advanced features include family and household grouping for child accounts, consent management for GDPR compliance, SCIM provisioning for enterprise user lifecycle management, and webhooks for real-time event notifications to external systems. The admin dashboard provides user search, audit logs, registration reports, and tenant isolation for multi-tenant architectures. A scalable clustering mode supports millions of users across distributed deployments.