GPTZero vs Is It AI?
GPTZero
gptzero.meIs It AI?
isitai.co.ukSide by side
| Figure | GPTZero | Is It AI? |
|---|---|---|
| Price from | $8.33/mo | £9.99/mo |
| Free plan | Yes | — |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | — |
| Plans published | 4 | 7 |
| Spec score · AI Detection Software | 9.0 (#5) | 7.7 (#24) |
| Headquarters | New York, United States | United Kingdom |
| Integrations | GPTZero lists Google Classroom and Canvas LMS integrations, an API for developers, and a Zapier integration. | The maker's comparison guide states Is It AI? has no LMS integration yet and runs in a browser. |
| Intended users | GPTZero describes its audiences as educators and students, as well as publishers, recruiters, copywriters, marketers, and businesses. | The product is designed for UK education and works on English-language written content generally. |
| Privacy | GPTZero says it does not store or collect documents submitted through API calls, while dashboard inputs may be used in aggregate to improve the service. | The maker says submitted text is processed and immediately discarded, is not retained, and is not used to train models. |
| Purpose | GPTZero identifies AI-generated text and highlights AI use at document, sentence, and word level. | Is It AI? screens written work for AI risk for teachers, tutors, schools, and students. |
| Support | The site directs users to its Support Center and customer service team for help. | Teacher Lite includes email support, while Teacher Pro and Whole School include priority support. |
Plans
GPTZero
- FreeFree
- Essential$8.33 a month
- Premium$12.99 a month
- Professional$24.99 a month
Is It AI?
- Single Check£4.99, paid once
- 3 Assignment Pack£9.99, paid once
- Teacher Lite£9.99 a month
- Dissertation Pack£14.99, paid once
- Teacher Pro£19.99 a month
- Department£499 a year
- Whole School£1,499 a year
In their own words
GPTZero
GPTZero identifies likely AI-generated writing and highlights detected AI use at document, sentence, and word level. Its detector can classify text as human, AI, or mixed, and provides confidence scores, explanations, AI vocabulary, and sentence-by-sentence highlighting. Advanced Scan points to passages contributing most to an AI classification. Users can submit pasted text or DOCX, PDF, and image files; the technology page says it can analyze up to 50 files at a time. GPTZero lists support for English, German, Portuguese, French, and Spanish, and detector coverage for text from ChatGPT, GPT-3 through GPT-6, Gemini, Claude, Copilot, and other models. Additional tools include Writing Replay, plagiarism checking, writing feedback, and grammar checking. The Chrome extension scans webpages and Google Docs, and integrations include Google Classroom, Canvas, an API, and Zapier. GPTZero says its results may be wrong, perform better on longer English prose, and should not be used alone to punish students. The free plan costs nothing. Paid plans start at $8.33 a month when billed annually.