This is a translated, adapted version of an original post by NTT’s Iwase Yoshimasa available here, with agreement from the author. As the ecosystem move quickly, some updates were added in blue and in italic.
This post describes the current state (as of september 2016) of MCU and SFU media servers used in WebRTC solutions. I hope it will serve as a quick reference for those wanting to know more about the concepts and the available projects. The details of each product introduced here are not provided, but a link to each product is, so you can read further if you want. Moreover, we almost only mention stand alone media servers, and did not touch on webRTC CPaas or PaaS.