Yaak
Yaak is a free, open-source developer tool for Windows, macOS and Linux. The most intuitive desktop API client. Organize and execute REST, GraphQL, WebSockets, Server Sent Events, and gRPC. It has 19,377 GitHub stars and is released under the MIT license.
github.com/mountain-loop/yaak (opens in a new tab)
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About Yaak
A fast, privacy-first API client for REST, GraphQL, SSE, WebSocket, and gRPC – built with Tauri, Rust, and React. Development is funded by community-purchased licenses. You can also become a sponsor to have your logo appear below.
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Is Yaak free and open source?
Yes. Yaak's source code is public on GitHub under the MIT license, which is OSI-approved or FSF-free, so you can use, copy and change it for free.
How do I install Yaak?
Download the installer for Windows, macOS and Linux from its GitHub Releases page (latest: v2026.9.0) or the project website.
Is Yaak still maintained?
The repository's most recent commit was on Oct 27, 2026. appsgit only lists apps whose repository had a commit in the last six months.