Sydneyâs $120b tech cluster has shades of Silicon Valley Surry Hills, once best known for being the centre of Sydneyâs rag trade, is carving out a reputation as a technology hub with a cluster of privately owned tech companies. Updated Save Share Two Silicon Valley veterans running a technology venture fund out of Sydneyâs Surry Hills donât have to walk far to find a dozen technology companies valued at about $120 billion. Chris Barter and Zeb Rice, the co-founders of King River Capital, believe the growing cluster of tech companies in Surry Hills and environs is reminiscent of what they saw happen in Palo Alto, California and Tel Aviv.