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SchemaSpy vs ChartDB: catalog facts
SchemaSpy	ChartDB
Free Free and open source.	Freemium Self-hosted version is free; the cloud service is free to start with paid team features.
Windows, macOS, Linux, Command line	Web, Self-hosted
Generates ER diagrams automatically Static HTML output is easy to share	Diagram from a single query without database access Exports DDL scripts
Requires Java and the right JDBC driver Command-line configuration only	Collaboration features are aimed at the cloud version
Downloadable app	Web application, Self-hosted
Open source	Open source
License: LGPL-3.0	License: AGPL-3.0
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 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.