Five9

CEO: Mike Burkland

Founded: 2001

Headquarters: San Ramon, Calif.

Cloud-based contact center specialist Five9 who could enhance Cisco's more traditional contact center business.

"This is a no-brainer for Cisco," said Kerravala. "The one area that is still lagging is their contact center. They have a very traditional contact center business, but that market is moving to the cloud. Cisco isn't very far down that journey."

Kerravala also said Five9 is a high-value business. "If you look at the revenue that they get per contact center, per seat – they're at the very high end of $200 per-seat on average. For Cisco who drives high value, high margin, it's a natural fit," he said.