Compare software

Resonance vs Yaak: catalog facts
Resonance	Yaak
Free Free and open source under the MIT licence.	Freemium Yaak is MIT licensed and free to build and use. Development is funded by…
Linux	Windows, macOS, Linux
No account, cloud sync or telemetry Collections stored as plain YAML files	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
Younger and smaller than Postman or Insomnia No built-in sync for sharing collections across a team	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
Open source	Open source
License: MIT	License: MIT
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 21, 2026

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