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draw.ioProcessOn
Free

Free and open source under Apache 2.0. The project states you can use it for any purpose…

 Freemium

Free to use after registering, with a paid team edition.

Windows, macOS, Linux Web
  • Works entirely offline with files stored locally, so nothing is uploaded
  • Large shape libraries including AWS, Azure, Cisco and Kubernetes icon sets
  • Covers a wide range of diagram types in one tool
  • Real-time collaboration with version history
  • Electron, so it is heavy for a diagram editor
  • No real-time collaboration in the desktop build
  • Interface and documentation are in Chinese
  • Files are kept in the vendor's cloud
Downloadable app Downloadable app, Web application
Open source Closed source
License: Apache-2.0 License not stated
No account needed Account needed
Works offline Not stated if it works offline

Checked September 21, 2026

Checked October 2, 2026

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