Fremont and Berkeley drive tech scene growth
siliconvalley.com
siliconvalley.com
* Office space is in very short supply. Office space with adequate parking is even more difficult to find. This is mostly due to restrictions on building.
* Both Berkeley and Alameda County levy taxes on the gross receipts of companies, which hits tech companies that do business on global markets. [1],[2]
* The political climate is not exactly favorable to techies. A good percentage of the population is anti-growth.
There has been a fair amount of interesting technology spawned from the Cal EE/CS department over the years. Berkeley also has convenient BART connections which make it easy to reach from many locations in the Bay Area. Still, most companies move out of town fairly quickly when they achieve any sort of size. Databricks is a recent example--they started as a spin-off from Berkeley AMPLab work but are now located on Spear in San Francisco.
I suppose over time the absurd costs of doing business in San Francisco will drive more business into the East Bay as people relocate out of the city. That said it seems premature to talk about a tech boom in Berkeley. The situation seems unlikely to change soon.
[1] http://www.acgov.org/treasurer/faqbus.htm#receipts
[2] http://www.ci.berkeley.ca.us/ContentDisplay.aspx?id=4258
Interestingly, unless you're focusing on primarily VC-funded style growth, it's easier to get spaces near BART outside of SF. We've always been within 2 blocks!
Edit: as a data point, the last ~4 Berkeley companies my colleagues started all did Berkeley->Oakland somewhere between the 3-10 person point.
At this point I would probably go for Oakland as well, in part because of the excellent BART access.
Fremont has been Indian-ized, so it's fine to live and work there if you're Indian, otherwise it's just a long commute to nowhere.