Spojiti knows no one. That's the whole point.
Most messengers you have used know who you are. They have your phone number, and through it your country, your carrier, often your contacts and a graph of everyone you have ever written to. Encryption protects the words; it does nothing for the fact that the words were exchanged, by whom, and when. That fact is worth money to many of those companies, and it is the record they can be compelled to hand over.
Spojiti starts from the other end. There is no phone number, no e-mail, no name and no sign-up: your account is a random id. Your identity is a key your phone derives from twelve words you keep. Our relay routes sealed envelopes between random ids and deletes them on delivery. When a court asks us who you are, the honest answer is a random account id and the little our relay keeps beside it; your name, number and e-mail are not on our systems, because we built it that way.
That is not a policy. Policies change with owners, with laws, with pressure. It is a construction, and it is published, in the white paper, in the protocol reference, and in the source. Read it. Then decide whether "we promise not to look" was ever good enough.