Which version of Microsoft Internet Explorer support WebRTC?

Question

Update 2019: No IE actually supports WebRTC and no IE ever will. In 5 weeks Microsoft Edge will die and long live Chromium based Edge.

That supports WebRTC.

Answer 1

For now IE doesn't support WebRTC. Moreover, it seems like MS don't plan to implement WebRTC. They announced a new technology called CU-RTC-Web - kinda Microsoft analog of WebRTC.

CU-RTC-WEB: http://html5labs.interoperabilitybridges.com/cu-rtc-web/cu-rtc-web.htm

Expected that this CU-RTC-WEB will be compatible with todays WebRTC.

UPDATED

Some people also report that IE supports WebRTC when using http://www.google.com/chromeframe

UPDATED

Microsoft announced supporting WebRTC in IE: http://blogs.msdn.com/b/ie/archive/2014/10/27/bringing-interoperable-real-time-communications-to-the-web.aspx

UPDATED

While Microsoft will be adding WebRTC in IE, probably in 2015, to which version of IE is left to be seen: https://bloggeek.me/microsoft-browser-webrtc/