Pricing
- 10,000 words per month
- Basic AI Scan
- 3 Free Advanced Scans
- 5 Free AI Highlights in Chrome Extension
- 300,000 words per month
- Advanced AI Scan
- Multilingual AI detection
- Download AI reports
- AI Highlights in Chrome Extension
- 500,000 words per month
- All of Premium
- Up to 2 million words overage
- Scan up to 250 files at once
- Page by page scanning
Pricing from the official site, verified Jun 2026. Always confirm current prices on the vendor site.
Pros & cons
Our analysisPros
- Sentence-level AI detection analysis
- Overall score plus granular breakdown per passage
- Integrates with Google Docs, Canvas, and Zapier
- Free tier and API both available
Cons
- Paid plans start at $12.99/month
- Accuracy varies with shorter or heavily edited texts
- Mobile app may lack full feature parity
What users say
GPTZero is commonly used by educators and academic institutions to evaluate whether student submissions were generated by AI tools. A frequently noted strength is the sentence-level breakdown, which identifies specific passages rather than returning only a single overall verdict. A common limitation is that heavily edited or paraphrased AI text can reduce detection confidence, and full feature access requires a paid subscription.
Editorial summary based on public information.
Best for
Educators and institutions checking submissions for AI-generated content
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AI Detector & AI Checker for ChatGPT, Gemini, Claude, & More| Feature | GPTZero | Originality |
|---|---|---|
| Pricing | Free | Freemium |
| Price from | $12.99/mo | — |
| Free tier | Yes | Yes |
| API | Yes | Waitlist |
| Open source | Yes | No |
| Platforms | Mobile App | Browser Extension |
| Models | Gptzero | Originality |
| Context window | 32k | 1M |
| Launched | 2025 | 2022 |
| Languages | English, German, Portuguese +2 more | English |
| Integrations | Google Docs, Google Classroom, Canvas +1 more | Chrome, WordPress, Moodle |
| Output formats | — | .docx, .txt |
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Specs
| Pricing | Free |
|---|---|
| Price from | $12.99/mo |
| Free tier | Yes |
| API | Yes |
| Open source | Yes |
| Platforms | Mobile App |
| Models | Gptzero |
| Languages | English, German, Portuguese, French, Spanish |
| Integrations | Google Docs, Google Classroom, Canvas, Zapier |
| Context window | 32k |
| Launched | 2025 |