Twilio is a cloud communications IaaS (Infrastructure as a Service) company based in San Francisco, California. Twilio allows software developers to programmatically make and receive phone calls and send and receive text messages using its web service APIs. Twilio's services are accessed over HTTP and are billed based on usage. As of June 2012, more than 100,000 developers use the service. Twilio was founded in 2007 by Jeff Lawson, Evan Cooke, and John Wolthuis and was originally based in both Seattle, Washington and San Francisco, California. Twilio's first major press coverage was the result of an application built by Jeff Lawson to Rickroll people, which investor Dave McClure used on TechCrunch founder and editor Michael Arrington as a prank. A few days later the company launched Twilio Voice, an API to make and receive phone calls completely hosted in the cloud.
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