A brief history of Zoom

https://www.cnbc.com/2019/08/21/zoom-founder-left-job-because-he-wasnt-happy-became-billionaire.html

1997 came to US barely spoke English and landed a coder job in WebEx.  

2007 sold to Cisco:  Yuan became the tech giant’s vice president of engineering.  

2013 out of Cisco and starts Zoom. He was able to win the support of friends and angel investors like Dan Scheinman, a fellow former Cisco executive who believed in Yuan’s new project enough to cut him a $250,000 check. (He’s now a Zoom board member whose stake in the company was worth nearly $176.5 million after Zoom’s IPO, in April).  At that time, the videoconferencing market was fairly crowded, dominated by tech giants like Cisco, Google and Skype (which sold to Microsoft for $8.5 billion in 2011). That made it difficult for Yuan to convince venture capital firms to back his new venture.