Our take
Fine for a quick look. Use a more rigorously tested detector when the stakes are higher.
At a glance
- Best for: Quick, free checks by students and writers
- Free option: Free for all users; premium adds batch uploads
- Website: quillbot.com
Main features
- Free AI detector
- File upload (1 at a time free, up to 20 with premium)
- Paraphrasing, grammar, and summarizing tools
Strengths
- Free and simple
- Convenient if you already use QuillBot
Limits and concerns
- The same company sells a paraphrasing tool, which some reviewers see as a conflict
- Published independent testing is limited
Remember: no detector score is proof that someone used AI. How accurate are AI detectors?
Last reviewed October 2026. Features and free limits change often; check the product’s site for current details. We have no affiliate relationship with any product reviewed here.