Last year was mighty productive for the folks at Vivox, as the voice chat firm doubled its user base and now serves over 45 million customers worldwide. While 45 million is quite a large number on its own, when taken together with the fact that Vivox served a mere 18.5 million users in early 2010, it's easy to see how the competition has its work cut out for it.

Gaming firms including Wargaming.net, Runewaker, and Bigpoint all turned to Vivox for their voice needs in 2010, and company CEO Rob Seaver says that's just the tip of the proverbial iceberg. "There is a clear opportunity for voice providers to reshape the social web with a communication medium that has proven to be the easiest, most intuitive channel of communication throughout [...] thousands of years of existence: voice," he said in a press release earlier today.

Vivox also provides voice services for the likes of CCP Games, Linden Lab, and Sony Online Entertainment, and you can find more coverage of the company in our interviews with VP of Product Management Monty Sharma.

This article was originally published on Massively.