Superhuman, the company that used to be Grammarly, just bought GPTZero, the startup that catches AI writing. The contradiction is the point. As the internet fills with machine-made text, proving something is human is becoming a product.
There is a neat irony at the centre of this deal. Superhuman’s biggest product helps people write with AI. It has just bought the startup best known for catching AI writing.
On Tuesday, Superhuman, the productivity firm formerly called Grammarly, agreed to acquire GPTZero. The companies did not disclose terms. PitchBook puts GPTZero’s value above $88m, Business Insider reported.
Founder Edward Tian says the company passed 19 million registered users and $30m in annual recurring revenue. It got there on total funding of just $13.5m, from a short backer list that includes Uncork Capital, Footwork, Jack Altman’s Alt Capital and Neo. The two cofounders and GPTZero’s 30 staff now join Superhuman to run a team focused on authenticity.
The 💜 of EU techThe latest rumblings from the EU tech scene, a story from our wise ol' founder Boris, and some questionable AI art. It's free, every week, in your inbox. Sign up now!The pairing looks odd, and reporters said so fast. But the contradiction is roughly the plan. AI-written text now floods the web. Knowing what a human actually made is turning into a category of its own. Superhuman calls that category an “authenticity layer”, and it wants to own it.








