GPTZero

About GPTZero

GPTZero is an AI detection platform that identifies AI-generated text from ChatGPT, Claude, Gemini, and more, and checks writing quality. Trusted by 17 million users and over 1 million educators, it serves schools, publishers, recruiters, and businesses.

GPTZero builds AI detection tools that identify text generated by large language models such as ChatGPT, Claude, Gemini, GPT-5, Llama, and DeepSeek. Its multi-step detection model highlights AI-written phrases, checks hallucination and plagiarism, and provides writing quality feedback. The company reports 99% classification accuracy and independent benchmarking results on its site.

GPTZero serves over 1 million educators and is used in more than 3,500 colleges and hundreds of institutions. Its tools are also aimed at publishers, recruiters, copywriters, marketers, and businesses that need verifiable human writing. The platform integrates with Chrome, Google Docs, Google Classroom, Canvas, and Zapier, and offers API access.

GPTZero makes money through a freemium SaaS model: a free scanning tool with paid upgrades, plus commercial plans and sales-led offerings for institutions and organizations. Founded in January 2023, the company is focused on preserving trust and transparency in the age of AI.