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PlantUML vs Graphviz: catalog facts
PlantUML	Graphviz
Free Free and open source under the GPL.	Free Free and open source.
Windows, macOS, Linux, Web, Command line	Windows, Command line
Covers far more diagram types than most text-based tools Integrations for nearly every editor, wiki and documentation system	Diagrams generated automatically from plain text Exports to PNG, SVG, PDF and PostScript
Requires Java and, for some diagram types, Graphviz The syntax is inconsistent between diagram types	Requires learning the DOT language Limited manual control over automatic layouts
Downloadable app, Web application	Downloadable app
Open source	Open source
License: GPL-3.0	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 1, 2026

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