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Structurizr vs LikeC4: catalog facts
Structurizr	LikeC4
Freemium Open source under Apache-2.0; the documentation includes a pricing page for the server…	Free Free and open source under the MIT License.
Web, Self-hosted	Web, Command line
Reference implementation of the C4 model Many diagrams generated from one text model	Generates diagrams from architecture models in code Supports custom notation and nested model levels
Focused on the C4 model rather than general diagramming Requires learning the Structurizr DSL	Architecture definitions use LikeC4's own language
Web application, Self-hosted	Downloadable app, Web application
Open source	Open source
License: Apache-2.0	License: MIT
No account 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 October 8, 2026

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