Compare software

ChatGPTBox vs Merlin: catalog facts
ChatGPTBox	Merlin
Free Free and open source; model providers may charge for API use.	Freemium Free to start, with a paid plan from 19 US dollars.
Browser extension	Android, iOS, Web, Browser extension
Works on any web page Open source with an active community	Several AI models in one place Page, search and video summaries from the extension
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 Fuller use requires 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.