Compare software

Scalar API ClientPostman
Freemium

The open-source client is free; the wider Scalar platform has commercial offerings.

 Freemium

A free tier covers individual use with limits on collaborators, collection runs and…

Web Windows, macOS, Linux, Web, Browser extension
  • Understands OpenAPI descriptions
  • Open source on GitHub
  • 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
  • The website focuses on the commercial docs and SDK platform rather than the client
  • Most useful when an OpenAPI description exists
  • Built around a cloud workspace, and an account is effectively required
  • Offline and local-only use has become harder over successive versions
Web application Downloadable app, Web application, Browser extension
Open source Closed source
License not stated License not stated
Not stated if an account is needed Account needed
Not stated if it works offline Needs internet

Checked September 23, 2026

Checked September 21, 2026

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