reCAPTCHA is one of many "free" systems that are seemingly helpful and innocent, but are actually part of the #Google data-collection ecosphere.
If you are a #website / app #developer, consider using tools & APIs that do not collect user & system information.
If you must use a particular system that integrates with reCAPTCHA or similar, please provide them feedback that you would like alternatives to Google services.
Users, choose to solicit sites that value your #privacy and user data.
@IzzyOnDroid I totally agree with you. I have seen several solutions that do exactly what you are talking about, but nothing generic enough to work with anything.
It seems like it would be something useful enough to justify the effort of making a general-purpose tool though.l