Fusio
Open source API management and backend platform
About Fusio
Fusio is an open source API management platform that helps developers create, manage, and scale APIs in one place. It provides routing, OAuth2 authentication, rate limiting, SDK generation, OpenAPI documentation, and monetization features. Fusio includes a backend admin panel to control and monitor APIs, a developer portal for API consumers, and a marketplace for sharing reusable actions and apps.
Pros & Cons
Pros
- Completely free and open source
- Built-in API monetization — rare for OSS platforms
- Auto-generates SDKs in multiple languages
- Developer portal included out of the box
- Active development with modern feature additions
Cons
- Smaller community than Kong or Tyk
- Documentation could be more comprehensive
- PHP-based — may not fit all tech stacks
- Limited cloud hosting options — primarily self-hosted
Key Features
API routing and request handling
API routing and request handling
OAuth2 authentication and authorization
OAuth2 authentication and authorization
Rate limiting and throttling
Rate limiting and throttling
OpenAPI specification generation
OpenAPI specification generation
Client SDK generation
Client SDK generation (C#, Go, Java, Python)
API monetization and subscription billing
API monetization and subscription billing
Developer portal for API consumers
Developer portal for API consumers
Backend admin panel with analytics
Backend admin panel with analytics
Marketplace for reusable actions
Marketplace for reusable actions
TypeSchema-based validation
TypeSchema-based validation
AI/MCP integration support
AI/MCP integration support
Pricing
- Full API management
- OAuth2 authentication
- Rate limiting
- OpenAPI generation
- Self-hosted
Best For
API Management
Create, manage, and scale APIs with routing, auth, rate limiting, and documentation in one platform
API Monetization
Monetize APIs with built-in subscription billing and developer portal