Turnstile is advertised as “a user-friendly, privacy-preserving alternative” to CAPTCHA. According to a press release, it will remove interactive challenges used to verify people, which Cloudflare says normally take an average of 32 seconds, and reduce the entire process to one second.
A zero-touch test that cuts confirmation time to one second
Although hardware keys can work well, they require users to always have access to them. So the company has also created a version that can “ask” a trusted device (smartphone or otherwise) if it is in fact not being operated by a bot.