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AI content detectors and humanizers
8 tools that check text for AI writing or rewrite it. Detectors that estimate whether text was AI-written, plus rewriting tools marketed as humanizers. Detector scores are probabilistic and can be wrong; check your school's or publisher's policy.
How to read this page. The tools are grouped by category and are not ranked. Pricing labels come from vendors' own pages when we could confirm them. Always verify plans and limits on the vendor's site.
Writing (7)
| Tool | What it does | Pricing | Link |
|---|---|---|---|
| Copyleaks | Plagiarism and AI-content detection platform. | See site | Official site |
| GPTZero | Detection tool that estimates whether text was written by a person or an AI model. | See site | Official site |
| Originality.ai | Content checker for publishers that flags likely AI-written text and plagiarism and checks facts and readability. | Freemium | Official site |
| Sapling | Writing assistant and grammar checker for customer-facing teams. | Freemium | Official site |
| Undetectable AI | AI detector and humanizer that checks text for AI signals and rewrites it. | Free trial | Official site |
| Winston AI | AI content detector and plagiarism checker for educators and publishers. | Freemium | Official site |
| ZeroGPT | AI content detector for checking whether text was written by ChatGPT and similar models. | Freemium | Official site |
Education (1)
| Tool | What it does | Pricing | Link |
|---|---|---|---|
| Turnitin | Academic integrity and writing feedback platform. | See site | Official site |