GPTZero
The AI detector built for educators
| Vendor | GPTZero Inc. |
|---|---|
| Categories | AI Tools, Assessment |
| School types | K-12, Higher Education |
| Pricing | Freemium — Free for individuals with monthly document limits; Edu plans from $9.99/month per teacher; institution pricing on request |
| Deployment | Cloud, Browser Extension |
| Free trial | Yes |
| Rating | 4.4/5 (3241 reviews) |
| Website | https://gptzero.me |
About GPTZero
GPTZero is the leading AI detection platform for educators, helping teachers and institutions identify AI-generated writing in student submissions with transparency and accuracy. Founded in 2022 by Princeton student Edward Tian, GPTZero analyzes text using multiple signals — including perplexity, burstiness, and sentence-level scoring — to determine the likelihood that content was generated by ChatGPT, GPT-4, Claude, Gemini, or other large language models. Teachers can paste text directly, upload Word or PDF documents, or submit batches of student work, receiving detailed highlighting that shows exactly which sentences are most likely AI-generated alongside an overall document score and confidence indicator. Unlike simple one-score detectors, GPTZero explains its reasoning and provides sentence-by-sentence analysis, giving educators the evidence needed to have informed conversations with students. The platform integrates with Canvas, Google Classroom, and other LMSs via API, enabling institutions to build AI detection into existing assignment workflows. GPTZero Origin, a browser extension, flags AI content while students are actively writing — functioning as an early-intervention tool before submission. For institutions, GPTZero Edu provides team dashboards, batch submission processing, API access, and LMS integrations. GPTZero has been used to scan over 200 million documents and is trusted by more than 3 million educators in 120 countries, including school districts, universities, and government agencies globally.