Correct, no 3rd parties. Saving just one sentence from a conversation/message is all that is needed he'll to break loose.

I know it will take a lot of time but we should know that we are creating social network and in social network user privacy is most important thing.

I know, I am very attached to these values as well, and whenever there is an alternative, I will always be there to support it, like for example Open Map.
In this case we can ask for its integration, what we have done and what we are going to get, super great mega.
But in this case, what can we suggest? I understand that Una can not do everything, besides it is better that it focuses on its main function, as it is better that Onsignal does not take care of creating cms.
I also think we need to relativize things a little.
1. ALL your users have a Smartphone, which runs on either Android or IOS. or windows. Ubuntu tried the experiment but eventually gave up.
So everything they do and what they say leaks in all ways by that first before even talking about Una.
2. Always before talking about Una, their data goes through the air, and there you know as well as me that there are also leaks.
3. PC, windows, chrome, cables, you know it's the same thing. Gmail ???
Is not it true? so I think we can explain this very well, and say that we do WE, the maximum not to make matters worse, but as far as possible by explaining that we can not always look to the free, but when possible we do it.
I believe that to be completely anonymous, you have to cut everything.
I think that today a hacker is trying to connect everywhere, tomorrow it will be the opposite, the feat will be not connected anywhere.
On this is not a reason to sit back and do not try to fight against it, I repeat, 100% agree, but just relativize a little things.
Nothing says that tomorrow an open solution will not come during the day ...
Has anyone analyzed the CGU of On signal?