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Gaphor vs Ilograph: catalog facts
Gaphor	Ilograph
Free The software is free under its open-source licence. Hosting, hardware and external…	Freemium New diagrams can be created online; on-prem and Confluence Cloud editions are separate…
Windows, macOS, Linux	Web, Self-hosted
It keeps a real UML 2 data model behind the diagrams, so elements are reused across views rather…	Zoomable views from overview to component level Interactive sequence diagrams for flows
It is a modelling tool rather than a quick diagram editor, and it does not generate code from…	Learning the diagram language takes some time Focused on system architecture rather than general drawing
Downloadable app	Web application, Self-hosted
Open source	Closed source
License: Apache-2.0	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
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.