Edward Tian built GPTZero over winter break of his senior year at Princeton, in the disorienting weeks after ChatGPT went mainstream, and put it up on a free Streamlit hosting page. The site crashed within a week as 30,000 people flocked to a program that could tell you how much of a piece of online writing was produced by AI.
Less than four years later, GPTZero has more than 20 million registered users, $30 million in annual recurring revenue, and a new parent company. Superhuman, the productivity company formerly known as Grammarly, agreed in June to acquire GPTZero for undisclosed terms. PitchBook data valued GPTZero at more than $88 million, but a source familiar with the matter said the deal represented at least a 10x return on the $13.5 million the company had raised in total.
