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Builder.io vs Onlook: catalog facts
Builder.io	Onlook
Freemium Can be tried for free, with sales contact for larger teams.	Free The source code is free to use and run yourself.
Web	Web, Self-hosted
Works with an existing codebase and design system Lets designers, PMs and marketers make changes as code	Visual edits produce real code AI-assisted building and styling
Aimed at teams rather than individual developers Larger plans go through sales	Focused on React web apps Self-hosting requires some setup
Web application, Hosted service	Web application, Self-hosted
Closed source	Open source
License not stated	License not stated
Account needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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