Captcha: Friendly Captcha (Only free for non-commercial Domains)
Captcha: Friendly Captcha is a GDPR-compliant Bot Protection and user-friendly ADD-ON.It's another captcha system that can be installed which provides an easy way to protect your website and online services from spam and abuse.
Captcha: Friendly Captcha is a proof-of-work based solution in which the user’s device does all the work.As soon as the user starts filling a form it starts getting solved automatically.