Twilio says it currently has about 200,000 enterprise companies that use its communications services. Analysts say that the San Francisco-based company has built a sales machine that effectively helped build the sector, and point to its soaring revenue, which reached $400 million in the second quarter. Because the cloud-based communications sector is so young, and yet to be adopted widely in industries such as healthcare and retail, Twilio’s market-leading position will enable it to keep growing, adds Ryan Koontz, an analyst at Rosenblatt Securities.