GPTZero
GPTZero detects AI-generated content from ChatGPT, GPT-4, Gemini, Claude, and other large language models with sentence-level precision. Designed for educators, publishers, and organizations that need to verify authentic writing, it offers advanced scanning, plagiarism detection, and integrations with Google Docs, Canvas, and Google Classroom. The tool serves over 10 million users and is trusted by institutions including Stanford, Harvard Law School, and The New York Times.
GPTZero is an AI content detector designed for educators, publishers, organizations, and professionals who need to verify authentic writing and identify text generated by ChatGPT, GPT-4, Gemini, Claude, Llama, and other large language models. The tool performs sentence-level analysis with 99% accuracy, using a proprietary seven-component detection model that minimizes false positives while classifying AI-generated content across multiple models and languages (English, German, Portuguese, French, and Spanish). Beyond detection, GPTZero offers a comprehensive writing verification suite including plagiarism checking, grammar feedback, Writing Replay for video proof of the writing process, and an AI Tutor for building responsible writing habits. The platform integrates directly into widely-used tools like Google Docs, Canvas, Google Classroom, and Chrome, making it accessible within existing workflows for over 3,500 colleges and hundreds of institutions including Stanford, Harvard Law School, and The New York Times. Users can start free with 10,000 characters per scan, or upgrade to Premium ($12.99/month) for 300,000 monthly words and advanced features, or Professional ($24.99/month) for 500,000 monthly words, batch file processing, and enterprise-grade security. GPTZero serves over 17 million users and is ranked by G2 as the #1 most trusted AI detection tool.
The privacy policy states data is processed for service improvement and analytics but does not explicitly confirm AI mod
No training opt-out mechanism was identified in the legal documents.
High risk across multiple dimensions. Only use with public, non-sensitive data.
The privacy policy states data is processed for service improvement and analytics but does not explicitly confirm AI model training on user content. The policy mentions processing for 'identify usage trends' and 'determine effectiveness' but lacks clear disclosure about AI/ML training specifically.
“We process information about how you use our Services to better understand how they are being used so we can improve them.”
Section 10 (Contribution License) grants extremely broad rights to the company. Users retain ownership but grant unrestricted use rights. Section 12 (Submissions) is particularly risky, stating the company owns 'exclusive rights, including all intellectual property rights' to any submissions with 'unrestricted use and dissemination.'
“We shall own exclusive rights, including all intellectual property rights, and shall be entitled to the unrestricted use and dissemination of these Submissions for any lawful purpose, commercial or otherwise.”
Policy states 'We do not collect any information from third parties' but allows sharing in 'Business Transfers' and with service providers (PayPal, Stripe). Third-party analytics and advertising partners are mentioned for tracking technologies.
“We may share or transfer your information in connection with, or during negotiations of, any merger, sale of company assets, financing, or acquisition of all or a portion of our business.”
Policy states data is kept 'as long as necessary' with a general limit of 3 months post-account termination, but allows indefinite retention for legal compliance. Users can request deletion but company may retain data for fraud prevention and legal purposes.
“No purpose in this notice will require us keeping your personal information for longer than three (3) months past the termination of the user's account.”
Section 10 explicitly states users retain ownership of contributions, but Section 12 (Submissions) contradicts this by granting the company exclusive ownership of all intellectual property rights to any submissions with unrestricted use rights.
“We do not assert any ownership over your Contributions. You retain full ownership of all of your Contributions and any intellectual property rights or other proprietary rights associated with your Contributions.”
Terms explicitly state the site is NOT compliant with major regulations. Section 1 states: 'The Site is not tailored to comply with industry-specific regulations (Health Insurance Portability and Accountability Act (HIPAA), Federal Information Security Management Act (FISMA), etc.)' No mention of SOC2, GDPR, or ISO certifications.
“The Site is not tailored to comply with industry-specific regulations (Health Insurance Portability and Accountability Act (HIPAA), Federal Information Security Management Act (FISMA), etc.)”
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