The <i>largest</i> tech companies appear to be localized in the US, specifically the Bay Area and Washington.<p>Why haven't foreign tech companies achieved the same global market penetration and saturation as US-based firms?<p>Examples like Samsung, Spotify, HTC, Sony, Baidu don't seem to have the same market cap nor breadth or global reach of a Google, Apple, Amazon or Microsoft.<p>But those countries do have talented engineers and funds to succeed. So what's stopping them?