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QuillBot vs Smodin: catalog facts
QuillBot	Smodin
Freemium Free to use with limits, with a Premium subscription for more.	Freemium Free to try, with paid plans for heavier use.
Windows, Android, iOS, Web, Browser extension	Web
Many writing tools in one place Extensions for Chrome, Edge and Safari	Several writing tools in one place Accepts uploaded Word, PDF and text files
Advanced modes need a Premium subscription Text is processed on QuillBot's servers	AI detection scores are estimates and can be wrong Humanizer output may conflict with school or publisher rules
Downloadable app, Web application, Browser extension	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 26, 2026

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