Kurento is an open source Media Server, to create webrtc based applications, it has a small but really active community. Kurento can be implemented in node.js + what ever front end you like with javascript, java or directly at the browser using the json rpc api of Kurento. In this talk,we will learn some basics about webrtc, requirements and what are the main challenges using kurento, and how easy is to create a enterprise grade webRTC based video conference service. Privacy and cost efficiency with open source is demonstrated one more time.