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LikeC4 vs Overarch: catalog facts
LikeC4	Overarch
Free Free and open source under the MIT License.	Free Free and open source under the EPL-1.0 license.
Web, Command line	Command line
Generates diagrams from architecture models in code Supports custom notation and nested model levels	Supports C4 and several UML diagram types Separates architecture models from their views
Architecture definitions use LikeC4's own language	Uses data files to define models and views
Downloadable app, Web application	Downloadable app
Open source	Open source
License: MIT	License: EPL-1.0
Not stated if an account is 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 8, 2026	Official website Full listing and sources Checked October 8, 2026

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