Comment by marvinblum

Yup, I've been running Altcha on pirsch.io for a while now, and it was super easy to set up, is free, and open-source.

One of the main reasons we've switched from hCaptcha is privacy. The server-side stuff can be self-hosted and there is a Golang integration. Really nice.

Here is the link for anyone who would like to take a look: https://altcha.org/