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D2 vs Diagram-as-code: catalog facts
D2	Diagram-as-code
Free Free and open source under the Mozilla Public License 2.0.	Free Free software under the Apache 2.0 license.
Windows, Command line	Command line
Diagrams as text that fit into version control Simple syntax with automatic layout	Generates AWS diagrams from YAML Works in containers without a graphical interface
Requires learning the D2 syntax Less fine control than drawing by hand	Focused on infrastructure diagrams
Downloadable app	Downloadable app
Open source	Open source
License: MPL-2.0	License: Apache-2.0
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 8, 2026

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