basically what the title says
the ones i’m aware of:
- google’s recaptcha
cloudflare’shcaptcha
cloudflare being better for privacy compared to google, but still not great afaik
Cloudflare’s Turnstile has an invisible mode that you’re probably using in a lot of places and aren’t aware of it. It provides an invisible challenge to the browser and requires no interaction. I would say no input require in quite user-friendly.