The numbers come first. GPTZero, the AI-detection startup built by Edward Tian, says it now has more than 20 million registered users and $30 million in annual recurring revenue.
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, and a source familiar with the matter said the transaction represented at least a 10x return on the $13.5 million the company had raised in total.
Tian, 26, and his cofounder, Alex Cui, now lead a combined 'authenticity' team inside Superhuman. Their job is to build GPTZero’s detection technology into a tool used by tens of millions of writers.
The company’s origin story started in a much simpler place. Tian built GPTZero over winter break of his senior year at Princeton, in the weeks after ChatGPT went mainstream, and put it on a free Streamlit hosting page. The site crashed within a week as 30,000 people arrived to test whether a piece of online writing had been produced by AI.
Tian said he never wanted to be a founder. He wanted to be a journalist.
Before graduating, he worked with investigators at Bellingcat, spent time on the BBC Eye Investigations team reporting on disinformation, and had accepted a fellowship with the New York Times visual investigations team when GPTZero started taking off. He also said he learned from John McPhee, the longtime New Yorker staff writer and Princeton journalism professor, whose class he took before graduating.
According to Tian, McPhee emphasized process, telling students to write one draft, then a second, then a third. Tian said those lessons became early inspiration for his thinking about AI detection, which he described as an 'initial response' and a 'band-aid' for bigger questions about writing.
Cui, now GPTZero’s chief technology officer and a director of engineering at Superhuman, had already worked on trust and integrity online before the GPT era. In late 2017, as a Caltech undergraduate, he helped build Open Mind, a browser extension aimed at 'fake news' and online propaganda. He later presented its findings to Facebook’s misinformation team and to Senate staff on Capitol Hill.
Cui said the team failed to capitalize on that early attention with a bigger product, and that lesson shaped his response when Tian’s solo project began gaining traction. 'We need to act right now,' he remembered thinking. 'Drop everything, launch something.'
For the market, the message is blunt: when technology creates confusion, there is room for private enterprise to build tools that restore trust. Capital rewards clear rules, and users will pay for products that help separate human work from machine output. The administrative state did not build GPTZero. Two founders did, and the market voted fast.
