Roundtable

Roundtable built Proof of Human, an API that verifies whether a website visitor is a real person or a bot/AI agent by analyzing behavioral patterns like typing rhythm, mouse movement, and scrolling in real time. It runs invisibly in the background rather than interrupting users with a CAPTCHA, and the company reports detection accuracy around 99% for bots and AI agents, positioned above general-purpose options like Google's and Cloudflare's own bot-detection tools. The system is designed to avoid collecting personal data or tracking users across sites, and it's built to operate at scale, processing more than 10 million sessions a month with under 200 milliseconds of added latency. Integration is a JavaScript snippet plus a web API, documented at docs.poh.org, which makes it straightforward to add to an existing site without major engineering work. The product targets market research firms that need to confirm survey respondents are human, financial services companies verifying account creation and transactions, and ticketing platforms trying to stop bots from sweeping inventory. The company was founded by two Princeton cognitive scientists and has since rebranded from Roundtable AI to Proof of Human, PBC, based in San Francisco; customers include Stanford University. Detailed pricing tiers are not published on the site.