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Hello HTTP vs Postman: catalog facts
Hello HTTP	Postman
Free Free and open source under the Apache 2.0 licence.	Freemium A free tier covers individual use with limits on collaborators, collection runs and…
Windows, macOS, Linux	Windows, macOS, Linux, Web, Browser extension
Supports HTTP, WebSocket, GraphQL subscriptions and gRPC Desktop app rather than a cloud service	The most widely used API client, so collections and tutorials for it are everywhere Collections with environments, pre-request and test scripts, and a built-in runner
Built mainly around one developer's needs Smaller ecosystem than Postman or Insomnia	Built around a cloud workspace, and an account is effectively required Offline and local-only use has become harder over successive versions
Downloadable app	Downloadable app, Web application, Browser extension
Open source	Closed source
License: Apache-2.0	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 21, 2026

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