Zoom Rooms Google Chromebox Microsoft Lync Room Polycom, Cisco, Lifesize

Quality

Ease of use iPad Touch Controller Remote Control Touch Console Touch Console
Video support HD up to 3 screens, 25-200 Video Streams SD 2 Screen, 15 Video Streams HD up to 2 Screens, 5 Video Streams Polycom & Cisco support up to 3 HD screens, Variable/$$
Screen sharing WiFi, Airplay and Wired WiFi WiFi Wired

Features

Login Email, Google, SSO/AD Google Windows/AD None
Calendar Google and Exchange Google Exchange Polycom & Cisco support Google & Exchange (Life-size does not)
Other Legacy Endpoint Support H.323/SIP: Cisco, Lifesize, Polycom None None H.323/SIP
Phone Global dial-in or Call Out None None Only with costly integration
Recording MP4 or M4A YouTube Lync Server Proprietary
Deployment options Mac, PC or Touchscreen Proprietary Proprietary 3rd party Proprietary
Pricing Extremely Affordable Extremely Affordable Moderate Expensive