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RAD Studio vs Lazarus: catalog facts
RAD Studio	Lazarus
Paid Commercial licence with an update subscription; free Community Editions of Delphi and…	Free Free and open source under GPL and LGPL licences.
Windows	Windows, macOS, Linux
Delphi and C++Builder in a single IDE Visual designers for building application interfaces	Drag-and-drop form designer for building desktop interfaces Delphi compatibility and a converter for Delphi projects
Full product is commercial and sold with a subscription Centred on Delphi and C++, not a general-purpose editor	Tied to the Pascal language and Free Pascal toolchain Smaller ecosystem than mainstream IDEs for other languages
Downloadable app	Downloadable app
Closed source	Open source
License: Proprietary	License: GPL/LGPL
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 October 2, 2026	Official website Full listing and sources Checked September 24, 2026

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