Easy Message - Easy Message app comes up with features to help users in effortlessly sending text messages to a phone number, which is not in the contact list.

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.

Seecrypt - Seecrypt app allows users to do secure voice and conference calls by using advanced encryption features so they can contact their friends, colleagues, and family members without any privacy issues.

CallHippo - Easy to use Phone System with World-Class Support

Silent Phone - Silent Circle is a secure communications firm offering enterprise communications solutions including software, devices, and services.

KrispCall - Virtual cloud phone system for business