FusionAuth
Complete Customer Identity and Access Management (CIAM) platform with SSO, MFA, OAuth2, and OpenID Connect. Deploy anywhere with security-first design.
FusionAuth delivers a comprehensive authentication and user management platform designed for modern applications. Unlike traditional auth providers, it offers hybrid, single-tenant deployment that you can develop and test anywhere - whether on your own infrastructure, their cloud, or on-premise.
Key features include:
- Single Sign-On (SSO) and Multi-Factor Authentication (MFA)
- OAuth2 and OpenID Connect integrations
- API-first architecture for seamless developer experience
- Unlimited identity providers with no additional costs
- Security-first design with 99.99% uptime SLA
The platform handles 1,000+ logins per second and provides 24/7 engineer-led support. With step-by-step integration guides and SDKs for any language or platform, developers can add complete authentication functionality in days rather than months.
Trusted by 20+ million developers, FusionAuth eliminates the complexity and escalating costs associated with other CIAM providers. Whether you're building an MVP or scaling to enterprise levels, the platform grows with your needs without vendor lock-in or usage-based pricing surprises.
Perfect for B2B and B2C use cases across healthcare, gaming, retail, and other industries requiring robust identity management solutions.
FusionAuth exposes metrics, logs and events via API but requires external tools like Prometheus and Grafana
Provides user import methods including the User API, SCIM and connectors
Tenants create isolated namespaces with separate login screens, password policies and email settings. API keys can be scoped to tenants for isolation and security
Per‑tenant rate limits can be configured for failed login, passwordless login, forgot password, email verification and two‑factor code sending. Exceeding the limit temporarily locks the account
Tenants can be used to separate development, staging and production environments within a single FusionAuth instance. API keys scoped to tenants isolate data and configuration
FedRAMP
GDPR
HIPAA
ISO 27001
SOC2
