Compare software

ChatGPTBox vs Sider: catalog facts
ChatGPTBox	Sider
Free Free and open source; model providers may charge for API use.	Freemium Free to start, with paid plans for more usage.
Browser extension	Windows, Android, iOS, Web, Browser extension
Works on any web page Open source with an active community	Access to several AI models in one sidebar Page summaries and notes while browsing
Needs access to a model provider such as ChatGPT or an API Repository moved, so older links point to the previous owner	Closed source hosted service Heavy use needs a paid plan
Browser extension	Downloadable app, Web application, Browser extension
Open source	Closed source
License: MIT	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	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.