Alex has made major contributions to OSS (Open Source Software) for over 20 years and launched HCAPTCHA, a CAPTCHA tool which now blocks malicious bots for more than 14% of the world’s traffic. What most people don’t know is that it is powered by Human Protocol, a knowledge marketplace leveraging crypto for 100m users worldwide, where machines post jobs for humans.

We talk about how they’ve achieved a scale that could make them the most used DApp on the planet, privacy and the open knowledge economy, as well as the composable Open Data Stack that will power Web 3.