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Ilograph vs PlantUML: catalog facts
Ilograph	PlantUML
Freemium New diagrams can be created online; on-prem and Confluence Cloud editions are separate…	Free Free and open source under the GPL.
Web, Self-hosted	Windows, macOS, Linux, Web, Command line
Zoomable views from overview to component level Interactive sequence diagrams for flows	Covers far more diagram types than most text-based tools Integrations for nearly every editor, wiki and documentation system
Learning the diagram language takes some time Focused on system architecture rather than general drawing	Requires Java and, for some diagram types, Graphviz The syntax is inconsistent between diagram types
Web application, Self-hosted	Downloadable app, Web application
Closed source	Open source
License not stated	License: GPL-3.0
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
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 22, 2026

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