Most investors have probably never heard of Bandwidth (BAND), or for that matter, the corner of the enterprise software market that it shares with its much more famous rival Twilio (TWLO), communications-platform-as-a-service (abbreviated as "CPaaS"). Both Bandwidth and Twilio have seen tremendous gains over the past year as developers continue to gobble up CPaaS capabilities to rapidly build voice/text capabilities within their applications, but Bandwidth has only recently been "discovered" as a hot stock. A smaller and slower-growing competitor, Bandwidth still retains some advantages over Twilio - chiefly its cheaper valuation,