Superhuman has acquired GPTZero, the AI detection startup founded by Princeton graduate Edward Tian as a senior thesis project. The companies said the deal was announced on Tuesday, while financial terms were not disclosed.
GPTZero has grown quickly since its launch, reaching more than 19 million registered users and about $30 million in annual recurring revenue, according to Tian. He also said the company had become profitable in 2024.
Built with co-founder and CTO Alex Cui, GPTZero raised a $3.5 million seed round led by Uncork Capital and later a $10 million Series A led by Footwork co-founder Nikhil Basu Trivedi, bringing total funding to $13.5 million.
Superhuman, which now operates under the name adopted after Grammarly's acquisition and rebrand, already offered its own AI detection feature. GPTZero's tools focus on identifying AI-generated text, while Superhuman says the combination strengthens its authenticity offering. The company described the move as a way to bring together complementary detection capabilities in one platform.
As AI-assisted writing becomes more common, this acquisition could help shape a more transparent digital workflow for students, creators, and professionals in the years ahead.
