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Postman vs Hello HTTP: catalog facts
Postman	Hello HTTP
Freemium A free tier covers individual use with limits on collaborators, collection runs and…	Free Free and open source under the Apache 2.0 licence.
Windows, macOS, Linux, Web, Browser extension	Windows, macOS, Linux
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	Supports HTTP, WebSocket, GraphQL subscriptions and gRPC Desktop app rather than a cloud service
Built around a cloud workspace, and an account is effectively required Offline and local-only use has become harder over successive versions	Built mainly around one developer's needs Smaller ecosystem than Postman or Insomnia
Downloadable app, Web application, Browser extension	Downloadable app
Closed source	Open source
License not stated	License: Apache-2.0
Account needed	Not stated if an account is needed
Needs internet	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.