GPTZero

Preserving What’s Human in the Age of AI

GPTZero is the leading AI detector for checking whether a document was written by a large language model such as ChatGPT. Named one of TechCrunch’s Most Disruptive Startups of 2024 and recognised as the #1 Best AI Software Product of 2025 by G2, GPTZero is on a mission to preserve what’s human in a world increasingly shaped by artificial intelligence.

The platform detects AI use at the document, sentence, and word level, offering users transparency into how text is created. Its model is trained on a large, diverse corpus of human-written and AI-generated text, with multilingual support across English, Spanish, French, German, and more. To date, GPTZero has served over 10 million users globally and works with over 100 organisations in education, hiring, publishing, data labelling, and reviews.

I began supporting them in 2024 to scale their content, and in 2025 moved into leading Content and Media: driving narrative development, defining the online voice, and producing content that makes AI literacy accessible for educators globally.

How Copy & Co is helping

• Defining GPTZero’s tone of voice and core narrative across web, product, and educational channels;

• Producing SEO-led, research-backed explainers that make complex AI detection concepts accessible and trustworthy;

• Shaping the messaging for product launches, including AI Grader and multilingual detection;

• Creating and refining user education assets (such as FAQs and guides) that help teachers and institutions understand GPTZero’s detection methods and practical applications.