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FusionAuth

Identity and Access Management (IAM)

Open Source
Free Tier
Paid Plans
Paid Plans
E
Enterprise
Self-hosted
OpenMSP Score
47
24
Reddit Impact Score
Github Score
333K
240Stars
76Forks
695Commits
Mar 19, 2026Last commit
FusionAuth is an authentication and authorization platform that provides user management, single sign-on, and multi-factor authentication. It offers flexible deployment options, comprehensive API, and advanced security features with a focus on developer experience.
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Key Features

Developer-First Design

Built specifically for developers with comprehensive APIs, SDKs for multiple languages, and extensive documentation for rapid integration

Flexible Deployment Options

Self-hosted or cloud-hosted options with identical features, allowing organizations to choose based on their security and compliance requirements

Complete Authentication Suite

Full range of authentication methods including passwords, passwordless, MFA, SSO, social login, and modern standards like WebAuthn

Advanced User Management

Comprehensive user lifecycle management with custom user data, groups, roles, and fine-grained permissions

Pros and Cons

Pros

Developer Experience

Excellent developer experience with comprehensive APIs, SDKs, and documentation making integration straightforward

Deployment Flexibility

Choice between self-hosted and cloud deployment with feature parity, avoiding vendor lock-in

Free Community Edition

Generous free tier with unlimited users and core features, suitable for many production use cases

Standards Compliance

Full support for OAuth 2.0, OIDC, SAML, and other modern authentication standards

Cons

Limited Multi-tenancy

Multi-tenancy features are basic compared to enterprise IAM solutions, requiring additional configuration

Configuration Management

CI/CD-based configuration management is less mature than some competitors, requiring manual processes

Feature Comparison

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