I clicked around on utopia.fans and found a link to their page. They claim to provide an “[…] all-in-one kit for secure instant messaging, encrypted e-mail communication, anonymous payments and private web browsing”, although they do not seem to publish their source code of their infrastructure (taken from their FAQ):

Why Utopia is not open source?

We may disclose certain parts of code, specifically related to communication and encryption. However, the decentralized protocol will not be released. Utopia is very knowledge-intensive software. A lot of time, effort and resources went into this product, and we do not want to share all of our know-how as it will result in forks which in turn may result in instability of our main network. Fork will lead to the division of the community, while our intention is the unification of the community of like-minded individuals. The bottom line here is that a lot of software is closed source, and this does not hurt them a bit. In addition, we will audit our code.

They also advertise their own crypto currency “Crypton”, which can be earned by “by running Utopia mining bots online”. The devs themselves want to stay anonymous forever (see here), which kinda leaves no information on their business model.

I would personally not trust them with my data before they release the source code of at least their client applications; but maybe someone else knows more about them :)