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IcePanel vs Structurizr: catalog facts
IcePanel	Structurizr
Freemium Self-serve sign-up, with paid plans listed on the pricing page and demos for larger teams.	Freemium Open source under Apache-2.0; the documentation includes a pricing page for the server…
Web	Web, Self-hosted
Built around the C4 model for software architecture Interactive model rather than static drawings	Reference implementation of the C4 model Many diagrams generated from one text model
Aimed at software teams rather than general diagramming Online only with an account	Focused on the C4 model rather than general diagramming Requires learning the Structurizr DSL
Web application	Web application, Self-hosted
Closed source	Open source
License not stated	License: Apache-2.0
Account needed	No account 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 2, 2026

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