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Postman vs Thunder Client: catalog facts
Postman	Thunder Client
Freemium A free tier covers individual use with limits on collaborators, collection runs and…	Freemium A free tier is available. Paid licences add team and advanced features.
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	Runs inside the editor, so no second application to switch to Collections stored as repository files instead of a cloud account
Built around a cloud workspace, and an account is effectively required Offline and local-only use has become harder over successive versions	Team features and some collection capabilities require a paid licence Tied to VS Code and JetBrains editors
Downloadable app, Web application, Browser extension	Downloadable app
Closed source	Closed source
License not stated	License not stated
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 September 22, 2026

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