Insomnia
Freemium
An open-source API client for REST, GraphQL, gRPC and more, with AI help from Kong.
About Stoplight
Stoplight is built for teams that design their API before they write code. Its visual editor makes OpenAPI specs far less painful to write, and a style guide feature checks that every endpoint follows the same naming and structure rules.
From the same spec you get interactive documentation, mock servers and a way to review changes with teammates. That keeps designers, developers and writers working from one source of truth.
Stoplight is open source in parts, with hosted plans for teams. It suits organizations that manage many APIs and want consistency across them.
Standout features
- Visual OpenAPI editor
- API style guides
- Interactive documentation
- Mock servers
- Team review workflow
- Open-source tools
Tags
More in API Tools
View all →Treblle
Freemium
API observability and documentation that updates itself from real traffic.
Kong Konnect
Freemium
An API gateway and management platform that also handles traffic for AI models.
Speakeasy
Freemium
Generates SDKs, Terraform providers and MCP servers straight from your OpenAPI spec.
SwaggerHub
Freemium
The collaborative API design and documentation platform from the makers of Swagger.
Apidog
Freemium
An all-in-one API platform for design, debugging, testing, mocking and documentation.
