At 2600hz, we're tremendously excited about voice Apis, but we also see value in core telephony infrastructure.

How you interface with the stack is only half the problem, the underlying stack is where we innovate. Everybody has Rest APIs, but not too many companies are working on interfacing with equipment and dealing with core scaling issues (keeping state across the cluster becomes very interesting at scale).

This is cool, but as everyone else has noted, this is becoming a crowded space. Can you talk a bit about your underlying infrastructure? Are you guys a Freeswitch shop or did you reinvent the wheel in some capacity?

Curious :).