Insomnia REST Client now open-source
Leading Open Source API Development Platform for HTTP, REST, GraphQL, gRPC, SOAP, and WebSockets
Insomnia REST Client now open-source launched on May 10, 2017 with 218 votes, #133 of 3,229 launches that month and more than 95% of that year's launches. The site was not reachable when checked in September 2026.
In plain words
Insomnia is an open-source API development platform that supports HTTP, REST, GraphQL, gRPC, SOAP, and WebSocket protocols. Designed for developers and API teams, it offers features including API design from OpenAPI specs, mock generation, automated testing with scripting, and AI-powered capabilities. The platform integrates with Kong Konnect and supports local, Git, and cloud workflows, enabling users to test, debug, and design APIs efficiently.
written from the facts on this page · September 2026
Does a similar job
all alternatives →
Insomnia Designer – Open-source collaborative editor for API design2020 · insomnia.rest · ▲317Leading Open Source API Development Platform for HTTP, REST, GraphQL, gRPC, SOAP, and WebSockets
Insomnia REST API Client2015 · insomnia.rest · ▲112Build, manage, and run templated REST API requests
Yaak – An open source, Git-friendly desktop API client2025 · yaak.app · ▲153Hi HN! I'm Greg and I've been working on Yaak for just over a year. I usually describe it as a Postman alternative since most developers are familiar with that, but it's targeted more toward users that just want an API client (no mocking, testing, spec design, etc). Having also created Insomnia for a similar purpose, I never thought I'd build another API client again. But, after selling Insomnia in 2019 and watching it expand into the broader feature set of Postman, I was left wanting a simpler tool again. Yaak was my answer to that. It's hard to describe how it's better than the 100 other…
Restfox – Open source lightweight alternative to Postman2022 · restfox.dev · ▲758Last time I posted this it didn't garner much interest. There have been lots of improvements and fixes since the last release. Quick list of features: - Workspaces - Tabs - Nested Folders - Lots of context menus - Response history - Plugins - Runs fully in the browser and runs offline if necessary - Chrome and Firefox extension to bypass CORS restrictions - Desktop builds for all platforms - GraphQL support - Import collections exported from Postman and Insomnia - Simple user friendly interface I built this because I love Insomnia but wanted a portable version that I could run in the…
Insomnia-like client for SQLite2021 · rosefinchapp.com · ▲70Finally, a home for all your SQL queries.
More dev tools this month
the category →
open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.
Dev tools · 27d ago · github.com
Contribute to reladraw/reladraw development by creating an account on GitHub.
Dev tools · 25d ago · github.com
OpenBot▲362Grok Bot alternative: free, local, open-source, multiplayer
Dev tools · 22d ago · openbot.run
Talanoa▲340Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…
Dev tools · 20d ago · talanoa.email
CoreSpeed▲332One MCP for everything your agents need: apps, memory, tools
Dev tools · 27d ago · corespeed.io
Source: Show HN post ↗
Launched alongside, May 2017
the whole month →
Things 3.0▲757Complete revamp of the original, award-winning task manager
Work · 2017 · culturedcode.com