Uup is described as 'Reclaim your privacy With Uup. Uup is based on asymmetric encryption. Private key is generated based on the device and it doesn't need any email, mobile number or anything else to work' and is a Encrypted Chat app in the social & communications category. There are more than 50 alternatives to Uup for a variety of platforms, including Android, Windows, Linux, iPhone and Mac apps. The best Uup alternative is Signal, which is both free and Open Source. Other great apps like Uup are Telegram, Element, Matrix and Tox.
Tinfoil Chat (TFC) is a FOSS+FHD peer-to-peer messaging system that relies on high assurance hardware architecture to protect users from passive collection, MITM attacks and most importantly, remote key exfiltration.
VideoMeeting is a free and open source video conference solution built to have video calls and chats using your web browser. It is a pure web application based on WebRTC that can provide communication features within your web browser.
Coccinella is a free and open-source cross-platform instant messaging client with a built-in whiteboard for improved collaboration with other people.
Plugin enabling end-to-end encryption for instant messages on Pidgin using up to 4096-bit RSA with Mozilla NSS, automatic key creation, exchange, and storage, designed for simple use against man-in-the-middle attacks, open-source, and minimal setup required.
SureSpot is an open source encrypted messenger designed to make encrypted messaging simple and accessible to anyone.
WireMin is a decentralized network built by the people, for the people, and of the people. Enjoy full privacy and security with end-to-end encryption on a network without central servers. Your data stays under your control—free from censorship, surveillance, and exploitation.
Messenger Kids is a free video calling and messaging app designed for kids to connect with close friends and family from their tablet or smartphone. Kids can only connect with parent-approved contacts, which creates a more controlled environment.
Silent Phone – Secure Encrypted Video & Voice Mobile Phone Calls
You now have the ability to have secure encrypted phone calls between Silent Circle members, anywhere, anytime, with complete control.
Make a secure call as easy as an ordinary call and be sure of real safety.
VIPole is a Secure Instant Messenger for secure messaging, encrypted voice/video calls, group chats that provides highly secure and strongly encrypted environment for all your communications and files you exchange over internet.
MESSAGING-FIRST PLANNING: Your chat is now your command center. Plan hangouts, create tasks, and coordinate schedules without ever leaving the conversation. When someone says "let's grab dinner this week," you're already halfway there.
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