Instead of purchasing PBXes and T1 lines, companies have begun to hire developers to write apps that connect to the network through telecommunications APIs. Going forward, APIs are the new dial tone. Without a doubt, in 10 years the overwhelming majority of communications applications will be cloud-based, user-focused and infinitely responsive to business needs. —By Jeff Lawson, CEO of Twilio, a 2013 CNBC Disruptor 50 company from the telecom sector. (For more coverage of the CNBC Disruptor 50, click here From hundreds of companies nominated by venture capitalists, industry analysts, and beat reporters, CNBC has created the ultimate list of 50 innovators disrupting the marketplace and poised for hypergrowth). ‘ TO READ MORE : The world of communications is undergoing the largest change since the invention of the telephone. ‘ _____________________________________________________________________________ 2013/06/08 Summary By : Gigaom.com Five years ago, Twilio, a cloud-based communication service provider couldn’t find a penny. Last week it snagged $70 million and is worth half-a-billion dollars and is on track to do $50 million in revenues in 2013. It has IPO ambitions, thanks to CEO/co-founder Jeff Lawson.