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IBExpert vs SQuirreL SQL: catalog facts
IBExpert	SQuirreL SQL
Paid Commercial software; editions and prices are listed on the developer's site.	Free Free and open source.
Windows	Windows, macOS, Linux
Dedicated to Firebird and InterBase Regular dated releases	Works with any JDBC-compliant database Plugin system for extra features
Windows only for the IDE Much of the website is in German	Requires a Java runtime Interface feels dated next to newer clients
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: LGPL-2.1
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 23, 2026

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