Quillbot: AI Writing Assistant with Humanizer, Paraphraser & AI Detector
by QuillBot (Course Hero), LLC · 6,000,000 usersGood signsNothing in the store listing stands out.
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Used by 6,000,000 peopleA large user base means problems tend to get noticed quickly.
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Actively maintainedLast updated October 23, 2026.
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Registered businessThe developer has identified itself as a trader under EU law, with a public address.
Who makes it
- Developer
- QuillBot (Course Hero), LLC
- Address
- 303 East Wacker Drive Suite 2101 Chicago, IL 60601-5223 US
- chrome@quillbot.com
- Website
- quillbot.com
- Users
- 6,000,000
- Version
- 4.123.0
- Last updated
- October 23, 2026
What this page can't see
A store listing doesn't show what an extension can access on your computer, and it can't warn you later. Extensions get sold, and the next silent update can change everything.
Extension Guardian watches the extensions you have installed and warns you when one changes owner, gains new permissions or disappears from the store. Free, open source, no account.
Add to Chrome, it's free