Gartner rated Lync as top UC solution based on Critical Capabilities. To know more, check this link.
This research done by Gartner outlines and evaluates the leading UC product portfolios on the market, focusing on three use cases: telephony, collaboration and small or midsize businesses. While all vendor products were good, two received an overall rating of Excellent due to portfolio breadth and market strength. Cisco UC is in close second...