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Merlin vs HyperWrite: catalog facts
Merlin	HyperWrite
Freemium Free to start, with a paid plan from 19 US dollars.	Freemium Free to start, with paid plans for more use.
Android, iOS, Web, Browser extension	Web, Browser extension
Several AI models in one place Page, search and video summaries from the extension	Autocomplete suggestions inside Gmail and other sites Research with citations from scholarly sources
Closed source hosted service Fuller use requires a paid plan	Extension is Chrome only Text is processed by a cloud service
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	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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