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Lazarus vs RAD Studio: catalog facts
Lazarus	RAD Studio
Free Free and open source under GPL and LGPL licences.	Paid Commercial licence with an update subscription; free Community Editions of Delphi and…
Windows, macOS, Linux	Windows
Drag-and-drop form designer for building desktop interfaces Delphi compatibility and a converter for Delphi projects	Delphi and C++Builder in a single IDE Visual designers for building application interfaces
Tied to the Pascal language and Free Pascal toolchain Smaller ecosystem than mainstream IDEs for other languages	Full product is commercial and sold with a subscription Centred on Delphi and C++, not a general-purpose editor
Downloadable app	Downloadable app
Open source	Closed source
License: GPL/LGPL	License: Proprietary
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 October 2, 2026

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