GPTZero vs Winston AI
GPTZero
gptzero.me
Winston AI
gowinston.aiSide by side
| Figure | GPTZero | Winston AI |
|---|---|---|
| Price from | $8.33/mo | $5/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | — | Yes |
| Plans published | 4 | 8 |
| Spec score · Plagiarism Detection Software | 9.1 (#3) | 8.5 (#12) |
| Spec score · AI Content Detectors | 8.8 (#3) | 8.5 (#7) |
| Spec score · AI Detection Software | 9.0 (#5) | 8.5 (#12) |
| Spec score · AI Content Detection Software | 8.9 (#9) | 8.5 (#16) |
| API | The API accepts files and text and returns AI-detection probabilities at document, paragraph, and sentence level, including batch inference. | Winston offers developer APIs for AI detection, plagiarism detection, fact checking and AI image detection, with API-key authentication and published documentation. |
| Browser extension | The Chrome extension scans web pages and adds AI detection, citation checks, writing feedback, and writing replays to Google Docs and other workflows. | Winston AI describes a Chrome extension for scanning highlighted webpage text and images in the browser. |
| Headquarters | New York, United States | Montreal, Quebec, Canada |
| Integrations | GPTZero lists Google Classroom and Canvas LMS integrations, an API for developers, and a Zapier integration. | Official help pages list Google Classroom, WordPress and Chrome, Opera and Firefox browser extensions as integrations. |
| Languages | GPTZero says it fully supports English, German, Portuguese, French, and Spanish. | AI text detection supports English, German, French, Dutch, Spanish, Portuguese, Italian, Polish, Indonesian, Tagalog, Chinese, Romanian, Russian, Ukrainian, Bulgarian and Azerbaijani. |
| Purpose | GPTZero identifies AI-generated text and highlights AI use at document, sentence, and word level. | Winston AI detects AI-generated text and images and offers plagiarism checking and other content-integrity tools. |
| Security | GPTZero states it is SOC 2 Type II compliant and lists CCPA, GDPR, FERPA, HECVAT, and VPAT commitments or assessments. | Winston AI says it is GDPR compliant and that submitted content is never used to improve its models or capabilities. |
| Support | The site directs users to its Support Center and customer service team for help. | The company invites users to contact [email protected] and says it will get back to them promptly. |
| What it does | GPTZero detects likely AI-generated writing and identifies AI use at document, sentence, and word level. | Winston AI is a cloud content-verification platform for AI detection, plagiarism checking, fact checking, writing feedback, essay grading and image analysis. |
Plans
GPTZero
- FreeFree
- Essential$8.33 a month
- Premium$12.99 a month
- Professional$24.99 a month
Winston AI
- FreeFree
- Essential$60 a year
- Advanced$96 a year
- Elite$156 a year
- Essential$189 a month
- Advanced$2,914.50 a month
- Elite$4,924.50 a month
- Enterprise and Custom PlansPriced on request
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.
Winston AI
Winston AI checks text and images for AI-generated content and provides plagiarism checking and other content-integrity tools. Its detector identifies material from ChatGPT, Claude, Google Gemini, LLAMA, and other AI models. Users can paste text or upload DOCX, PNG, and JPG files; OCR extracts text from scans, pictures, and handwriting. An AI prediction map highlights passages and assesses text sentence by sentence, and reports can be downloaded or shared as printable PDFs. The homepage lists detection in 16 languages, including English, French, Spanish, German, Portuguese, Dutch, Polish, Italian, Romanian, Indonesian, Tagalog, Russian, Bulgarian, and simplified Chinese. Integration options include a Chrome extension, Google Classroom, WordPress, Zapier, and an API; the extension scans highlighted webpage text and images. Plans include a free option and a 14-day trial. Paid pricing starts at $10/mo billed annually; listed annual plans cost $60.00 USD, $96.00 USD, and $156 a year. Paid scans support up to 200,000 characters each. Annual subscriptions cannot be canceled during their term.