Insomnia

Insomnia is the open-source API client for REST, GraphQL and gRPC with AI-assisted request building and design workflows.

Overview

Insomnia gives developers a fast, clean workspace for designing and debugging APIs. It supports REST, GraphQL, gRPC and WebSocket, with environment management, code generation and test runs built in. AI features help generate requests from natural language, suggest test assertions and explain responses. Its open-source core and Kong backing make it a common choice in organizations that want an alternative to proprietary API clients, with team sync and enterprise governance available.

Key Features

• REST, GraphQL, gRPC and WebSocket support
• AI-assisted request generation and test suggestions
• Environment variables and secret management
• Code generation in 10+ languages
• Design and linting for OpenAPI specs
• Open-source core with team sync options

Pricing

Insomnia’s core is free and open source; paid plans add team collaboration, cloud sync and enterprise governance.

Who Is It For

Developers and QA engineers working with APIs daily who want a capable, extensible client without vendor lock-in.

Use Cases

Backend teams debug GraphQL queries with precise variables, and QA engineers run collections of API tests before releases. Architects design and lint OpenAPI specs collaboratively.

Getting Started

Download the app, import your API collection or create a request and save environments for dev, staging and production.

FAQ

Is Insomnia free to use?

Yes — the core client is free and open source; team features are paid.

Does Insomnia offer an API?

Insomnia supports plugins and CLI tooling for automation of API workflows.

How does Insomnia compare to alternatives?

Versus Postman, Insomnia is lighter with a stronger open-source core; versus Hoppscotch it has more mature desktop tooling.

Does it support GraphQL subscriptions?

Yes, GraphQL support includes queries, mutations and subscriptions with schema awareness.

Is my data synced?

Local-first by default; paid cloud sync options share collections across your team.

Is Insomnia still open source?

The core client remains open source under its license, with team and enterprise features offered commercially by the maintainer.

How does it handle GraphQL?

Schema awareness, queries, mutations and subscriptions with autocomplete make GraphQL work first-class rather than an afterthought.

Is Insomnia good for teams?

Team sync, shared environments and collection organization support collaboration, while the open-source core keeps individual use free.

What about gRPC and WebSockets?

Modern protocol support alongside REST and GraphQL makes Insomnia useful across the full spectrum of API development.

Does it support environment variables?

Yes — environments and secrets manage dev, staging and production values so collections switch contexts without duplication.