Compare software

apicTypeSpec
Free

Free and open source under the MIT license.

 Free

Free and open source under the MIT licence.

Linux, Command line Windows, Web, Command line
  • Keeps contracts as plain JSON in a Git repository
  • Offers CLI, TUI and desktop interfaces
  • Generates OpenAPI, JSON Schema and Protobuf from one definition
  • Much shorter than equivalent OpenAPI YAML
  • Collaboration depends on sharing a Git repository
  • Another language for the team to learn
  • Generated output still needs review against your API conventions
Downloadable app Downloadable app, Web application
Open source Open source
License: MIT License: MIT
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked October 8, 2026

Checked October 2, 2026

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