9 best FaceTime alternatives for Android phones
If security is your primary concern when it comes to the best FaceTime alternatives, consider Signal Private Messenger, a free encrypted messaging platform that supports end-to-end encrypted voice and video calls along with encrypted and self-destructing messages.
EU Commission to staff: Switch to Signal messaging app
While WhatsApp's technology is based on Signal's protocol (known as Open Whisper Systems), it isn't open-source. Another popular messaging app, Telegram, meanwhile, faces similar concerns over the lack of transparency on how its encryption works.
10 Tried and True Telegram Alternatives
Developed by Open Whisper Systems, or the same company that’s partnered with Facebook to provide end-to-end encryption to both WhatsApp and Messenger, Signal is a free, open-source chat app. That means experts can poke around, making sure the App does was it was designed to do in the way it was designed to do it.
11 Alternatives to Whatsapp that Actually Respect Your Privacy
Where did you get the idea that Signal is Telegram’s clone? The dates of the initial release of each alone should give you a clue (hint: Signal is > year earlier than Telegram). Also, Signal’s Moxie has a whitepaper published with their key ratcheting scheme (with favorable reviews from major cryptographers), while Telegram’s protocol MTproto contains some unmotivated choices and only hype-based “proof” of security.