Ring.cx is also not technically anonymous for mostly the same reasons. A decentralized hash table leave some metadata in the open, then when you call someone, t

Ring.cx is also not technically anonymous for mostly the same reasons. A decentralized hash table leave some metadata in the open, then when you call someone, there is a UDP stream between them. Ring wont give away your IP and details to the world, but it is vulnerable to many of the same metatdata vulnerabilities as Tor or Bitorrent. You can configure Ring to be "more anonymous" by adding some proxies/middleman-server and messing with the connection sequence, but it cannot really be used in the default configuration or it would not "just work". Adding proxies for voice stream also add audio latency. Edit: Our NAT punching is IETF compliant STUN/TURN/ICE/UPnP, so you can always just pick a third party you trust in the rare few cases you need one (we don't support IPv6 that well yet, so no luck there, it will come at some point).