Signal is a cross-platform encrypted messaging service developed by the Signal Foundation and Signal Messenger LLC. It uses the Internet to send one-to-one and group messages, which can include files, voice notes, images and videos.
Alexandre Mouriec and 88 others use Signal Messenger
Viber is a cross-platform voice over IP and instant messaging software application operated by Japanese multinational company Rakuten, provided as freeware for the Android, iOS, Microsoft Windows, macOS and Linux platforms.
Instantly reach the people in your life—for free. Messenger is just like texting, but you don't have to pay for every message (it works with your data plan).
Alexandre Mouriec and 224 others use Facebook Messenger
Wire™ is the most secure collaboration platform, transforming the way businesses communicate at the same speed that our founders disrupted telephony with Skype. Featuring messenger, voice, video, conference calls, file-sharing, and external collaboration – all protected by the most advanced end-to-end encryption.
Start a free secure and private chat with anyone. It's easy as sharing a unique code and allowing access. All messages are public key encrypted. And, whats the best part? You don't have to signup to start using it! Update: You can now share join links!