Voxer – free app supporting walkie-talkie like communication with almost-instant delivery of voice and video messages, also supports text chats., works over both cellular and WiFi network.

Snapchat – privacy-savvy app for sharing images and videos securely, offers self-destruct feature.

Line – free, feature-rich instant messaging apps supporting desktops and mobile devices, offers end-to-end encryption by default for all users.

Mattermost – open-source messaging app particularly aimed at business users, compatible with all major platforms.

Wire – open-source platform, independently audited, requires email for account registration, paid app.Silence – open-source SMS/MMS app compatible with multiple devices, doesn’t require internet connection.Threema – open-source app offering E2EE, doesn’t require a phone number for account registration.

Viber – a user-friendly app with catchy interface, offers limited end-to-end encryption, supports self-destructing messages.Apple iMessage – offers end-to-end encryption for communication between iMessage users, support self-destructing messages.Wickr – an open-source platform with regular audits, alerts users upon taking screenshots.Dust – offers self-deleting messaging after being read, allows unsending messages, stealth search, breach alerts.Telegram – a bold messaging platform popular among privacy freaks for its resilience to government surveillance, optional end-to-end encryption with server-client encryption by default.

Signal – the most secure messaging app for individual users, robust end-to-end encryption by default, open-source code.

Private text messaging