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.

Seald - Keep your conversations secure, everywhere.

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.

Crypho - End-to-end-encrypted messaging and file sharing

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

Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.