Compare software

PlantUMLStructurizr
Free

Free and open source under the GPL.

 Freemium

Open source under Apache-2.0; the documentation includes a pricing page for the server…

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
  • Reference implementation of the C4 model
  • Many diagrams generated from one text model
  • Requires Java and, for some diagram types, Graphviz
  • The syntax is inconsistent between diagram types
  • Focused on the C4 model rather than general diagramming
  • Requires learning the Structurizr DSL
Downloadable app, Web application Web application, Self-hosted
Open source Open source
License: GPL-3.0 License: Apache-2.0
Not stated if an account is needed No account 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.