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UI-TARS Desktop vs Simular: catalog facts
UI-TARS Desktop	Simular
Free Free and open source; model hosting or API costs may apply.	Freemium The homepage does not state pricing details.
Windows, macOS	macOS
Controls the desktop through visual understanding of the screen Open source with an active, widely followed repository	Controls native desktop applications, not only the browser Backed by published research, including the Agent S framework
Needs access to a capable vision model Giving an agent control of your computer carries risk	Windows support was announced but not confirmed in the research Pricing is not stated on the homepage
Downloadable app	Downloadable app, Hosted service
Open source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked October 2, 2026

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