Insomnia vs Insomnium
Insomnia
insomnia.restInsomnium
github.comSide by side
| Figure | Insomnia | Insomnium |
|---|---|---|
| Price from | $12/mo | Free |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 4 | 1 |
| Spec score · API clients | 8.8 (#9) | 8.2 (#21) |
| Desktop downloads | Official downloads are provided for macOS, Windows, NSIS, and other operating systems, including Linux through the other downloads. | Downloads are offered for macOS, Windows, Ubuntu, Debian, CentOS, and Fedora; the README points Arch users to AppImage or tar.gz releases. |
| Free plan | Yes | Yes |
| GraphQL support | Yes | Yes |
| What it does | Insomnia is an AI-native API collaboration platform for designing, testing, debugging, mocking, and governing APIs. | Insomnium is a local API client for testing GraphQL, REST, WebSockets, server-sent events, and gRPC. |
Plans
In their own words
Insomnia
Insomnia is an API collaboration platform for designing, testing, debugging, mocking, and governing APIs. Its client supports HTTP, REST, gRPC, GraphQL, WebSockets, SOAP, and SSE. Design workflows include OpenAPI spec-first work, live previews, and generation of collections, tests, and mocks. Mocks can be generated from collections, OpenAPI specifications, API responses, or natural-language descriptions, locally or in the cloud. The collection runner supports unlimited runs, JavaScript before-request and after-response scripts, chained requests, and CI/CD execution through Inso CLI. Insomnia also connects to HTTP and STDIO MCP servers, supports custom tool parameters, and provides MCP authentication event logs. API data can stay local, reside in a Git repository, or be stored in Insomnia Cloud with optional end-to-end encryption. Teams can share projects, collections, mocks, and design specifications with organization controls and real-time collaboration indicators. Essentials is free; Pro is $12 a month per user, and Enterprise is $45 a month per user. It supports Linux, macOS, Windows, and self-hosted use.