Invoca - Call tracking & analytics software

CallTrackingMetrics - Know who is calling and how they found you. Maximize the return on your advertising.

Marchex - Marchex is a mobile advertising analytics company that connects online behavior to real-world, offline actions.

ResponseTap - ResponseTap provides visitor level call tracking solutions to track calls for businesses, marketing agencies and more.

CallFire - Grow your business with virtual phone numbers, IVR, voice broadcasting, mass text messaging services and power dialing.

Gong - Gong uses AI to analyze spoken conversations from audio sources and web conferencing platforms such as Cisco WebEx, GoTo Meeting and Zoom.