The original developers are from a software company called Redsolution, Inc. Xabber is available on the Android Play Store and on F-Droid.
Until 30 January 2013 was closed source, but was then published on GitHub as a decision by the development team.
Xabber offers no server infrastructure of its own, but it has a few popular services pre-configured.
Xabber uses Off the Record Messaging in combination TLS to provide strong Security (Perfect Forward Secrecy).
Orbot is used to access the Tor Network to obfuscate the connections between sender and recipient.