GPTZero vs Polygraf AI Detector
GPTZero
gptzero.mePolygraf AI Detector
polygraf.aiSide by side
| Figure | GPTZero | Polygraf AI Detector |
|---|---|---|
| Price from | $8.33/mo | $9.95/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Plans published | 4 | 3 |
| Spec score · AI Detection Software | 9.0 (#5) | 8.8 (#8) |
| Spec score · AI Content Detection Software | 8.9 (#9) | 8.7 (#12) |
| API | The API accepts files and text and returns AI-detection probabilities at document, paragraph, and sentence level, including batch inference. | The integrations page lists a REST API, webhooks, and Python and Node.js SDKs. |
| Founded | 2023 | 2021 |
| Headquarters | New York, United States | Austin, Texas, USA |
| Integrations | GPTZero lists Google Classroom and Canvas LMS integrations, an API for developers, and a Zapier integration. | The company lists native integrations including ChatGPT/OpenAI, Microsoft Copilot, Google Gemini, Anthropic Claude, and AWS Bedrock. |
| Intended users | GPTZero describes its audiences as educators and students, as well as publishers, recruiters, copywriters, marketers, and businesses. | The company describes the detector as protecting organizations that verify content before using, sharing, or publishing it. |
| 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 product page says analyses are private and that data is not stored or reused. |
| Purpose | GPTZero identifies AI-generated text and highlights AI use at document, sentence, and word level. | Polygraf’s AI Content Detector identifies whether content was created or manipulated by AI. |
| Security | GPTZero states it is SOC 2 Type II compliant and lists CCPA, GDPR, FERPA, HECVAT, and VPAT commitments or assessments. | The company describes its AI as on-premises, zero-trust, and locally run for real-time protection in regulated environments. |
| Support | The site directs users to its Support Center and customer service team for help. | The retail pricing page lists basic chat and email support on its $10-per-month Basic plan. |
Plans
GPTZero
- FreeFree
- Essential$8.33 a month
- Premium$12.99 a month
- Professional$24.99 a month
Polygraf AI Detector
- FreeFree
- Standard$9.95 a month
- Premium$49.95 a month
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.
Polygraf AI Detector
Polygraf AI Detector identifies whether content was created or manipulated by AI. It reports AI-versus-human probability scores, confidence information, and explainable evidence, and can identify which models may have generated content. The consumer page lists detection for ChatGPT, Gemini, Claude, and other models. One-click verification produces results described as transparent and auditable. The product is available on the web and as a Chrome extension, with file uploads and API access. Polygraf lists integrations with ChatGPT/OpenAI, Microsoft Copilot, Google Gemini, Anthropic Claude, and AWS Bedrock; some cloud-dependent integrations require internet access and do not work in air-gapped deployments. Related Data Provenance tools include AI highlighting, copyright and plagiarism detection, humanized text detection, writing analysis, and synthetic voice detection; the company says these tools are included in all plans. Polygraf says analyses are private and data is not stored or reused. Listed plans are Free at free, Standard at $9.95 a month, and Premium at $49.95 a month. The free plan includes 2.5K monthly tokens, approximately 2K words; Standard includes 150K monthly tokens, approximately 135K words, and Premium includes 1M monthly tokens, approximately 900K words.