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SQuirreL SQL vs QStudio: catalog facts
SQuirreL SQL	QStudio
Free Free and open source.	Free Free and open source.
Windows, macOS, Linux	Windows, macOS, Linux
Works with any JDBC-compliant database Plugin system for extra features	Supports 30+ databases with strong kdb+ and DuckDB support Built-in charts and SQL pivot tables
Requires a Java runtime Interface feels dated next to newer clients	Fewer administration features than full database admin tools Text2SQL relies on an AI model
Downloadable app	Downloadable app
Open source	Open source
License: LGPL-2.1	License not stated
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 1, 2026

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