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Glarity vs Sider: catalog facts
Glarity	Sider
Free Described on its site as free and ad-free.	Freemium Free to start, with paid plans for more usage.
iOS, Browser extension	Windows, Android, iOS, Web, Browser extension
Summaries for YouTube, search results and web pages Full-page and selection translation	Access to several AI models in one sidebar Page summaries and notes while browsing
Relies on third-party AI services Licence of the published source not confirmed	Closed source hosted service Heavy use needs a paid plan
Downloadable app, Browser extension	Downloadable app, Web application, Browser extension
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 23, 2026

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