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Graphviz vs D2: catalog facts
Graphviz	D2
Free Free and open source.	Free Free and open source under the Mozilla Public License 2.0.
Windows, Command line	Windows, Command line
Diagrams generated automatically from plain text Exports to PNG, SVG, PDF and PostScript	Diagrams as text that fit into version control Simple syntax with automatic layout
Requires learning the DOT language Limited manual control over automatic layouts	Requires learning the D2 syntax Less fine control than drawing by hand
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: MPL-2.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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