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Yaak vs Hello HTTP: catalog facts
Yaak	Hello HTTP
Freemium Yaak is MIT licensed and free to build and use. Development is funded by…	Free Free and open source under the Apache 2.0 licence.
Windows, macOS, Linux	Windows, macOS, Linux
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	Supports HTTP, WebSocket, GraphQL subscriptions and gRPC Desktop app rather than a cloud service
A much younger project than Postman, with a smaller community No hosted collaboration features if that is what you actually want	Built mainly around one developer's needs Smaller ecosystem than Postman or Insomnia
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: Apache-2.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked October 2, 2026

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