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MaxAI vs Sider: catalog facts
MaxAI	Sider
Freemium Free to install, with paid plans on the pricing page.	Freemium Free to start, with paid plans for more usage.
Web, Browser extension	Windows, Android, iOS, Web, Browser extension
Works on the current page from a sidebar Access to several AI model providers	Access to several AI models in one sidebar Page summaries and notes while browsing
Page content is sent to cloud AI services No Firefox extension listed	Closed source hosted service Heavy use needs a paid plan
Web application, 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 1, 2026	Official website Full listing and sources Checked September 23, 2026

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