GPTZero reaches $30M ARR and is acquired by Superhuman

GPTZero, the most popular AI text detection service, was acquired by Superhuman for an undisclosed amount. When the acquisition was announced, GPTZero had 19 million users and $30 million in annual recurring revenue (ARR) with just $13.5 million in external capital raised. This is one of the most capital efficient exits for an AI company in recent memory.

1From a Princeton thesis to a 19-million-user product

Edward Tian founded GPTZero out of his Princeton senior thesis three years ago as the first publicly available AI text detector for ChatGPT content. He launched at just the right time when ChatGPT became popular and people wanted to know “was this written by a human?” His co-founder Alex Cui (high school friend) helped turn it into a business.

They raised a $3.5M seed round and a $10M series A round and mostly grew organically within the education and enterprise markets. With $30M in ARR and only $13.5M in external capital raised, they were operating at about a 2x revenue to capital ratio which is extremely capital efficient compared to many AI companies who burn through that much money in 3 months.

2The acquiring company's unusual position

Superhuman was created after Grammarly acquired the AI powered email client called Superhuman and renamed it to that. They have their own AI text detector integrated into their writing software. So now they also own GPTZero as well. They say “two AI detectors are better than one” and will integrate both methods into their platform.

This is pretty funny because Superhuman is essentially an AI writing tool that allows you to write emails/documents more efficiently with the help of AI. But now they own the most popular tool for determining if something is written by AI. It’s interesting to see them sell the writing tool while also providing the credibility tool.

3What this signals for AI detection as a category

There’s been a bit of consolidation happening in the AI text detection space. GPTZero was one of the largest standalone players in this space. Now they’re owned by another large AI writing tool so the people determining if something is AI written are also creating AI written content. This could result in improved services, biased decisions, or just good old capitalism. We’ll have to see what happens.

If you’re a user of GPTZero (e.g. teacher, editor, HR department, moderator), you might be wondering if the product will change now that it’s owned by Superhuman. There weren’t any specific plans announced in the press release. Edward’s team was focused on AI authenticity whereas Superhuman’s goals are less clear. It will be interesting to see where this goes in the next year.