Forbes | 

Viptela

What it does: Network architecture.
Founders: Amir Khan, Khalid Raza.
Notable investor: Sequoia Capital.
Capital raised: $33.5 million with a valuation of more than $500 million.

Claims to be on track to produce $75 million to $100 million in revenue next year. More than 10 very large corporations have adopted Viptela software for managing and securing multiple networks. Three of the top ten global telecom companies have adopted a Viptela service model.

Original Article: http://www.forbes.com/next-billion-dollar-startups/