Compare software

PlantUMLIlograph
Free

Free and open source under the GPL.

 Freemium

New diagrams can be created online; on-prem and Confluence Cloud editions are separate…

Windows, macOS, Linux, Web, Command line Web, Self-hosted
  • Covers far more diagram types than most text-based tools
  • Integrations for nearly every editor, wiki and documentation system
  • Zoomable views from overview to component level
  • Interactive sequence diagrams for flows
  • Requires Java and, for some diagram types, Graphviz
  • The syntax is inconsistent between diagram types
  • Learning the diagram language takes some time
  • Focused on system architecture rather than general drawing
Downloadable app, Web application Web application, Self-hosted
Open source Closed source
License: GPL-3.0 License not stated
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 22, 2026

Checked October 2, 2026

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