peerio.com

[cathalgarvey@cathalgarvey.me (Cathal Garvey)]

Just landed beta: open source, minilock-based crypto, really nice 
design. Server side storage of end-to-end encrypted files and messages, 
1.3Gb of storage for free. No ads.

https://peerio.com

I expect that the "product" will end up being "storage space", which is 
fine by me! Right now the server code isn't open, though the protocol 
(and therefore API) is very well documented in the git source:

https://github.com/PeerioTechnologies/peerio-client

Expect to see it banned in the UK soon. :)