Callmama - Get cheap international calling, international virtual number, Call Mama Gives an added advantage to send message and make calls to non-user of Callmama App.
Invoca - Call tracking & analytics software
CallHippo - Easy to use Phone System with World-Class Support
CallTrackingMetrics - Know who is calling and how they found you. Maximize the return on your advertising.
Numero eSIM - Numero eSIM is a phone-number app that makes voice and data possible anywhere in the world, for free.
Marchex - Marchex is a mobile advertising analytics company that connects online behavior to real-world, offline actions.