7 karma · joined June 8, 2019
As @j3th9n mentioned, reCAPTCHA v3 does have challenge and you can invoke it based on a score.
https://developers.google.com/recaptcha/docs/v3#programmatic...
There are better alternatives like OOPSpam API that gives a score and works in the backend so no interaction with the user.
For contact forms and comment systems there are other alternatives other than captcha like OOPSpam API which is privacy-friendly and accessible as submission are simple analyzed in the backend without interacting with the user. Just wanted to mention.
Many websites don't need captcha anyway. They could go with options like OOPSpam API and silently flag spam based on Spam Score.
They certainly harvest visitor's data. There are many privacy-friendly comment systems as well as a 3rd party anti-spam service like OOPSpam that do not collect user data. It all boils down to the fact what is your local law says about privacy, and how much you care about your vistiors' privacy.