About 3CX Founded in 2005, when VOIP was an emerging technology, 3CX has gone on to establish itself as a global leader in business communications. Taking advantage of the SIP open-standard and WebRTC technology, 3CX has evolved from its roots as a PBX phone system to a complete communications platform, offering customers a simple, flexible, and affordable solution to call, video and live chat. With 3CX businesses can increase productivity, enhance customer experiences, while dramatically cutting costs and management headaches.