Not even on their github, blog or privacy policy you can find any names or addresses..

What conclusion do you draw from this?

I'm curious because it's pretty easy to find a postal address for any giant company, however what will you gain from it?

You'd at least know what jurisdiction the service is located in. If you run a company like that that wants to take care of people's private and most valuable data you should put as much information of you out there to gain trust.

This seems to be their founder/CEO: https://www.amiryan.org/ (at least, says so on his GH profile: https://github.com/alexamiryan )

try finding any type of contact information, a name, an email, a company name. There is nothing.

What I gain is trust, without it, I have suspicion.