API Testing · Founded by Gregory Schier

Insomnia

Leading Open Source API Development Platform

Cost

Free Tier

Rating

★ People love it

Time to value

Immediate

You can use Insomnia to test, debug, and design APIs for HTTP, REST, GraphQL, gRPC, SOAP, and WebSockets. It provides a collaborative environment where you can send API requests, examine responses, and create mock servers. The tool supports local testing without an account and includes Git sync for version control. Teams can share API collections and work together on API development with features like AI-powered commit messages and auto-generated mock servers.

What Insomnia does

Send HTTP requests to API endpointsExamine and validate API response dataCreate collections of related API requestsSet up environment variables for different stagesGenerate mock servers from API specificationsWrite and execute automated API testsSync API collections across team membersDebug WebSocket and real-time connectionsTest HTTP, REST, GraphQL, gRPC, and WebSocket APIsCreate and run automated test collectionsGenerate mock servers with natural languageSync API collections with Git repositoriesWork offline without requiring an accountAI-powered commit messages for version controlCollaborate on API development with teamsSupport for Socket.io and Server-Sent Events

Pricing breakdown

PlanPrice10 seats / yr

Free$0—

Annual estimates assume continuous billing at the listed list price. Volume discounts typical above 50 seats.

Frequently asked

GitHub

GitLab

Bitbucket

Want a tailored answer?

See whether Insomnia fits your stack.

Techbible weighs Insomnia against what you already pay for, your team shape, and the work that's actually happening. Free to start.

More in API Testing

All tools →

ApiDog

Simplify API development and testing

CobaltAPI

Cobalt is an embedded platform that turbocharges native integrations for SaaS developers.

Hoppscotch

A free, open-source tool to quickly test and develop APIs.

Postman

A platform that helps developers design, test, and manage APIs collaboratively.

Argos · Visual Regression for Playwright & Storybook

Ship faster with Argos visual testing for Playwright and Storybook. Catch regressions early with reliable diffs and reviews.

Bruno

Bruno is a fast, git-friendly API client for testing REST, GraphQL, and gRPC APIs. Open source alternative to Postman with offline-first design and no cloud sync required.

Gravitee io

Gravitee is an open-source scalable API management platform with an event-native API gateway, agent mesh & support for event streaming across all protocols

GraphQL

Fully Open-Source schema registry, analytics and gateway for GraphQL federation and other GraphQL APIs