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D2 vs Ilograph: catalog facts
D2	Ilograph
Free Free and open source under the Mozilla Public License 2.0.	Freemium New diagrams can be created online; on-prem and Confluence Cloud editions are separate…
Windows, Command line	Web, Self-hosted
Diagrams as text that fit into version control Simple syntax with automatic layout	Zoomable views from overview to component level Interactive sequence diagrams for flows
Requires learning the D2 syntax Less fine control than drawing by hand	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: MPL-2.0	License not stated
No account needed	Not stated if an account is needed
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 October 2, 2026

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