Superhuman

2 articles

Startup founder observing a rising graph indicating successful product-market fit, with a team collaborating in the background.

What is the 40% Rule for Product-Market Fit?

Superhuman, a popular email client, famously moved from 22% to 58% of users saying they would be 'Very Disappointed' if they could not use the product.

Maya Rios·August 18, 2026

Futuristic cityscape symbolizing the acquisition of GPTZero by Superhuman, highlighting innovation in AI detection technology.

Founders

Superhuman Acquires GPTZero AI Detection Startup

In just three years, GPTZero, an AI detection startup often viewed with skepticism, amassed over 19 million registered users and $30 million in annual recurring revenue before its acquisition by Super

Ethan Calder·June 24, 2026