About Insomnia
Insomnia is an open-source API client by Kong that provides a clean, fast interface for designing, testing, and debugging REST, GraphQL, and gRPC APIs. It features environment management, code generation, plugin support, and Git sync — popular with developers who want a lighter alternative to Postman.
Key Features
- REST, GraphQL, and gRPC request builder
- Environment variables and templating
- Code generation for multiple languages
- Plugin ecosystem
- Git sync for version control
- OpenAPI and Swagger design tools
- Cookie management
- Response history and comparison
Pros
- Open-source and lightweight — much faster than Postman
- Clean, minimal UI focused on API testing
- Git sync is great for version-controlling API specs
- Plugin system for extensibility
Cons
- Smaller feature set than Postman for advanced workflows
- Team collaboration features are less mature
- Recent changes by Kong have frustrated some open-source users
Integrations
GitHubGitLabGitKong GatewayOpenAPISwagger
Best Use Cases
- API testing and debugging
- OpenAPI spec design
- GraphQL development
- Lightweight Postman alternative
Insomnia Alternatives
Looking for alternatives to Insomnia? See all Insomnia alternatives →
Compare Insomnia
Quick Info
- Website
- insomnia.rest
- Founded
- 2016
- Company
- Owned by Kong
- Pricing
- freemium
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