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ChartDB vs SchemaSpy: catalog facts
ChartDB	SchemaSpy
Freemium Self-hosted version is free; the cloud service is free to start with paid team features.	Free Free and open source.
Web, Self-hosted	Windows, macOS, Linux, Command line
Diagram from a single query without database access Exports DDL scripts	Generates ER diagrams automatically Static HTML output is easy to share
Collaboration features are aimed at the cloud version	Requires Java and the right JDBC driver Command-line configuration only
Web application, Self-hosted	Downloadable app
Open source	Open source
License: AGPL-3.0	License: LGPL-3.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 24, 2026

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