What is Insomnia?
Insomnia is an open-source desktop application for building, testing and debugging REST, GraphQL, gRPC and WebSocket requests, comparable to Postman. Originally an independent project, it has been maintained by Kong since its 2019 acquisition; the desktop app is free, while Kong sells paid plans for team collaboration and cloud sync on top of the open-source core.
Read the full overview
Sources checked 27 September 2026: official website, documentation, repository, pricing.
Key capabilities
- Request builder: REST, GraphQL, gRPC and WebSocket support in one client.
- Environments and Git sync: version-controllable collections and environment variables.
- Plugins: an extensible plugin system for custom workflows.
API design and testing, request/response debugging, and collaborative API development workflows.
Insomnia fits developers who want a free, open-source, Git-syncable alternative to Postman for day-to-day API testing, with optional paid tiers only needed for team collaboration features.
Because the core client is open source and free, teams can adopt Insomnia without licensing cost and only pay if they need Kong's hosted team-collaboration features.
Technical details
- Access
- See vendor
- Source model
- Open source
- Founded
- 2015
- Headquarters
- San Francisco, USA
- Pricing model
- Open source
- API
- Available
- Published release
- Insomnia Core core@13.3.0 ↗ (checked )
- Source check
- Primary source ↗ checked
- Website
- insomnia.rest ↗
Official resources
What to verify for your environment
Start from the users, systems and operating responsibilities the tool needs to support.
- Confirm current features, licensing and support terms with the publisher.
- Validate deployment, data location, access control, backup and recovery requirements.
- Test integrations, export paths and a representative operational workflow before committing.
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