Compare software

Grammarly vs QuillBot: catalog facts
Grammarly	QuillBot
Freemium Free to sign up, with paid plans for more features.	Freemium Free to use with limits, with a Premium subscription for more.
Web, Browser extension	Windows, Android, iOS, Web, Browser extension
Grammar, spelling and clarity checks as you type One-click paragraph rewrites and tone suggestions	Many writing tools in one place Extensions for Chrome, Edge and Safari
Requires an account Text is processed on Grammarly's servers	Advanced modes need a Premium subscription Text is processed on QuillBot's servers
Hosted service, Browser extension	Downloadable app, Web application, Browser extension
Closed source	Closed source
License not stated	License not stated
Account needed	Not stated if an account is needed
Not stated if it works offline	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.