I was told that Utopia is not open source. why?
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.
Source :
https://u.is/en/faq.html#faq4