San FRANCISCO

The city area itself is quite small. We call it ‘7×7’ because it represents a grid area of 7 miles by 7 miles. For this reason, so many tech companies are concentrated in the same area, street and even building. Twitter sits next to Square and Uber in the same building on Market Street. Airbnb, Zynga, Pinterest, Dropbox and Yelp are all based in SOMA or South of Market Street. By just walking around the city, you are bound to see famous tech brands and fans snapping pictures of offices to commemorate their trip in the ‘Hollywood of Technology’.

LOS ANGELOS

Los Angeles "Silicon Beach" grows in stature.  $520 million was invested in LA's more than 1,000 startups, and the number of exits more than doubling in the first half of the year. And VC Investment is growing in Silicon Beach.

SAN DIEGO

According to data from the Kauffman Foundation's "Startup Activity"report, San Diego ranks as a top 10 start-up city for the past two years, advancing one spot to No. 9 in 2015. Eighty percent of entrepreneurs are considered "opportunity share" in the metro, meaning founders were not previously unemployed before launching, but instead started up as they saw an opportunity in the market. What's more, there are nearly 155 start-ups for every 100,000 residents in the area.