Are there any viable alternatives to reCAPTCHA?
I want to protect forms from bot submissions but I don’t want to feed the Google beast with my visitors’ data
Are there any alternatives to reCAPTCHA that work to stop spam submissions?
There are plenty of SaaS services. But I think you first need to find the right use case. For example, if it's a user login, you're probably better off with a basic honey pot plus MFA. If it's a blog, then you'll get rid of majority of spam with a simple captcha such as a math problem or one of the many open source basic image captcha implementations.