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Introducing Proton CAPTCHA | Proton
(proton.me)
Privacy has become a very important issue in modern society, with companies and governments constantly abusing their power, more and more people are waking up to the importance of digital privacy.
In this community everyone is welcome to post links and discuss topics related to privacy.
much thanks to @gary_host_laptop for the logo design :)
It's a proprietary CAPTCHA, the sources say.
Open source and free (as in free speech) are two separate concepts, software can be open source and proprietary
Give me the source code then.