Hajra Naz
AI detection startup GPTZero has been acquired by Superhuman, the companies announced on Tuesday.
GPTZero was founded three years ago by Edward Tian while he was a student at Princeton University. What started as a senior thesis project quickly grew into one of the most recognized AI detection tools on the market.
The financial terms of the acquisition were not disclosed. However, Tian told Business Insider that GPTZero had grown to more than 19 million registered users and generated $30 million in annual recurring revenue.
The company had already achieved profitability. In 2024, Tian said that GPTZero was operating in the black.
Tian launched the company alongside co-founder and CTO Alex Cui, a longtime friend he had known since high school. GPTZero raised a $3.5 million seed round led by Uncork Capital. It later secured a $10 million Series A round in June 2024, led by Footwork Ventures co-founder Nikhil Basu Trivedi. Other investors included Reach Capital, Alt Capital, and Neo. In total, GPTZero raised $13.5 million.
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Superhuman already offers an AI detection feature through its platform. GPTZero’s focus has been helping users identify AI-generated content and reduce the spread of low-quality AI material online.
Superhuman’s existing detection tools have mainly helped users, particularly students, understand whether their writing may appear AI-generated and make revisions when needed.
The acquisition may seem surprising given that both companies offered similar tools. However, Superhuman says the reasoning is simple: having two AI detection systems is better than one.
