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Thunder Client vs Yaak: catalog facts
Thunder Client	Yaak
Freemium A free tier is available. Paid licences add team and advanced features.	Freemium Yaak is MIT licensed and free to build and use. Development is funded by…
Windows, macOS, Linux	Windows, macOS, Linux
Runs inside the editor, so no second application to switch to Collections stored as repository files instead of a cloud account	Requests are stored as files on your machine, so a git repository is the shared collection REST, GraphQL, gRPC, WebSocket and Server-Sent Events in one client
Team features and some collection capabilities require a paid licence Tied to VS Code and JetBrains editors	A much younger project than Postman, with a smaller community No hosted collaboration features if that is what you actually want
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: MIT
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 21, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.