Superhuman acquires AI detection startup GPTZero
In Brief
2:48 PM PDT · June 23, 2026
GPTZero, the three-year-old AI detection startup that Princeton grad Edward Tian first built as a senior thesis project, has been acquired by Superhuman, the companies announced on Tuesday.
Terms of the deal were not disclosed, though Tian told Business Insider that GPTZero amassed more than 19 million registered users and $30 million in annual recurring revenue.
In 2024, Tian told TechCrunch that it was profitable. Tian and co-founder CTO Alex Cui, who’d been friends since high school, raised a $3.5 million seed round led by Uncork Capital, followed by a $10 million Series A in June 2024 led by Footwork co-founder Nikhil Basu Trivedi, with several other notable investors including Reach Capital, Jack Altman’s Alt Capital, and Neo. All told, the company raised just $13.5 million.
Superhuman — the company formed when Grammarly bought email providerSuperhuman last year and rebranded...
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