Proton, the Swiss company that develops privacy-focused online services such as email, has developed its very own CAPTCHA service to help discern between
I know that hCaptcha has a system where they send you an email containing a link to a page, which will set a cookie in your browser telling the CAPTCHA to auto-flag you as verified.
Of course, good luck if your browser blocks third-party cookies, you don’t browse in incognito mode, or if your screen reader can interact with the CAPTCHA to get the link in the first place…
I know that hCaptcha has a system where they send you an email containing a link to a page, which will set a cookie in your browser telling the CAPTCHA to auto-flag you as verified.
Of course, good luck if your browser blocks third-party cookies, you don’t browse in incognito mode, or if your screen reader can interact with the CAPTCHA to get the link in the first place…