| hubzilla | ISC aka MIT | yes | yes | Zot (PKI) + TLS | yes (via JavaScript, AES-256) | content obfuscation, private keys hidden in the DB. | yes, partly implemented | impossible to message privately in plaintext | no | yes, multiple separated channels possible within one account | yes | privacy built in, run your own @ home, nodes are called hubs |
| diaspora | AGPLv3orlater | yes | no[^1] | PKI + SSL/TLS[^1] | no[^2] | mostly plaintext | no | ? | no | yes, no naming policy | no | nodes are called pods |
| facebook | proprietary | no | no | planned, probably not implemented yet[^3] | implemented but not offered to users[^4] | unknown | no, walled garden | no, 3-d party plugin Cryptocat and pidgin is availiable but the user is not informed about this | no, with Cryptocat: yes, with pidgin+OTR: yes | only one wall allowed | only post editing | "real name"-policy enforced, advertising-driven, for profit company US-based |
| twitter | proprietary | no | no | unknown | no | unknown, probably none | no, walled garden | no | no | yes | only post editing | advertising-driven, for profit company US-based |