About Prosopo
Prosopo is an open source project dedicated to creating a community-powered bot detection network. Existing bot detection services are either privacy invasive or expensive. We aim to change that by being as transparent and privacy focused as possible.
Our approach to bot detection stems from traditional CAPTCHA systems, but with a twist. We collect as little information on the user as possible, with most detection being run in the browser. Cryptographic proofs are used to send the minimum amount of information to the server, and the server can verify the proof without needing to know anything about the user.
Our Team
Chris Taylor
Founder
18 years product & technology experience across a variety of companies including several startups in advertising and tech.
George Oastler
Founding Software Engineer
Published machine learning researcher and bitcoin miner since the early days. A skilled developer who is able to build complex web architectures with an understanding of where the technology is moving.
Hugh Parry
Founding Software Engineer
Mathematician and computer scientist with a deep understanding of data structures, algorithms, and cryptography. Blockchain payments advocate and one of the first employees worldwide to be paid in stable coin.
Trusted by companies of all sizes
- 1000+
- active websites
- 1B+
- monthly secure verifications
- 100M+
- bots stopped per month
Our customers love us
Hundreds of businesses have made the switch from reCAPTCHA and hCaptcha to us. Here's what they have to say.
I wanted to use a CAPTCHA which was as easy as possible for my website's visitors while respecting their privacy and which didn't use cookies. Prosopo's CAPTCHA meets all these criteria.
Update - after more than a week I haven't had a single spam form submiss on. Updated 31 Mar 2025
We managed to greatly reduce the friction and churn rate of our users 29 Apr 2025
Start for free today. No credit card required.