Turnstile automatically chooses a browser challenge based on “telemetry and client behavior exhibited during a session,” Cloudflare says, rather than factors like login cookies. taxis) and the strains that CAPTCHAs place on mobile data plans. In a conversation with TechCrunch, Graham-Cumming listed what he sees as the many downsides of CAPTCHA technology, including poor accessibility (visual disabilities can make it impossible to solve a CAPTCHA), cultural bias (CAPTCHAs assume familiarity with objects like U.S. But according to CTO John Graham-Cumming, the company was never quite satisfied with it - if Cloudflare’s public rallying cries hadn’t made that clear. Several websites offer human- and AI-backed CAPTCHA-solving services for as low as $0.50 per thousand solved CAPTCHAs, and some researchers claim AI-based attacks can successfully solve CAPTCHAs used by the world’s most popular websites.Ĭloudflare itself was once a CAPTCHA user. But the rise of cheap labor, bugs in various CAPTCHA flavors and automated solvers have begun to poke holes in the system. Available to site owners at no charge, Cloudflare customers or no, Turnstile chooses from a rotating suite of “browser challenges” to check that visitors to a webpage aren’t, in fact, bots.ĬAPTCHAs, the challenge-response tests most of us have encountered when filling out forms, have been around for decades, and they’ve been relatively successfully at keeping bot traffic at bay. Ahead of its Connect conference in October, Cloudflare this week announced an ambitious new project called Turnstile, which seeks to do away with the CAPTCHAs used throughout the web to verify people are who they say they are.

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