We recently migrated the CAPTCHA provider we use from Google's reCAPTCHA to a service provided by the independent hCaptcha. Since this change potentially impacts all Cloudflare customers, we wanted to walk through the rationale in more detail.
Here's a blog post regarding switching from ReCaptcha but a big crux of it is privacy reasons, Google's whole business model is targeting users with advertising and selling data. Switching to an alternative Captcha provider could be better in order to handle user privacy better, it's also better if anyone's using TOR since ReCaptcha can often give people trouble if they're trying to browse through anything like that, I've sometimes found it freezing and giving me issues using regular Firefox as well where it's either slow or doesn't work at all, which prevents me from logging in at all.
One alternative I can suggest is HCaptcha, which is from Cloudflare, which according to their post doesn't collect personal data, performs better, works even in regions and browsers where Google either doesn't work well or is just blocked altogether.
I think it would be good in order to better respect the privacy of the sites users.