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

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