Compare software

PlantUML vs nomnoml: catalog facts
PlantUML	nomnoml
Free Free and open source under the GPL.	Free Free and open source under the MIT licence.
Windows, macOS, Linux, Web, Command line	Web, Command line
Covers far more diagram types than most text-based tools Integrations for nearly every editor, wiki and documentation system	Readable syntax that resembles the drawn diagram Instant live preview in the browser
Requires Java and, for some diagram types, Graphviz The syntax is inconsistent between diagram types	Web editor stores diagrams only in browser local storage Smaller range of diagram types than PlantUML
Downloadable app, Web application	Downloadable app, Web application
Open source	Open source
License: GPL-3.0	License: MIT
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 2, 2026

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