MuleSoft has crossed an important symbolic milestone, topping $100 million in revenue during its fiscal 2015, marking a growth rate of 92 percent. Valued at $1.5 billion, the startup says it also now has nearly 900 enterprise customers using its Anypoint Platform, which connects APIs, SaaS applications and on-premises software.

Named customers include AT&T, Siemens, Verizon, Unilever and Mastercard. Its customer base includes four of the largest nine global banks, four of the top 10 global auto companies and two of the top five global retailers, according to a statement. More than 200 companies are now members of its partner program.

Behind MuleSoft's Growth

"As cloud adoption continues to accelerate, so goes API orchestration and cloud integration," says Constellation Research VP and principal analyst R "Ray" Wang. "The growth in the market reflects the shift to API-led connectivity."

It also didn't hurt that 2015 was such a pivotal year for the Internet of Things. MuleSoft has positioned the Anypoint platform as ideal for connected device scenarios, with its Mule engine able to be embedded on devices and featuring support for lightweight protocols such as Zigbee.

For more on IoT, be sure to read Constellation Research VP and principal analyst Andy Mulholland's blog post, which takes a look at how 2015 set the tone for IoT market competition this year.