Sylo is described as 'Smart Wallet designed for your best digital life. You keep your assets, your contacts and your conversations all in one place' and is a Video Calling app in the social & communications category. There are more than 100 alternatives to Sylo for a variety of platforms, including Android, iPhone, Windows, Mac and Linux apps. The best Sylo alternative is Signal, which is both free and Open Source. Other great apps like Sylo are Telegram, Element, Matrix and Tox.
FortKnoxster is a multidevice easy-to-use private and secure messaging, calling, crypto wallet and cloud storage, using advanced end-to-end encryption and leveraging on blockchain technology.
FireFloo is an instant messaging communicator combining the open XMPP standard (Jabber, GMail Chat etc.) with the echo protocol for multi-encrypted messaging. Use various methods to send chipertext over open standards like libgcrypt and encrypt your private communication.
Antox is an Android client for Tox. It aims to bring the full multimedia support Tox offers to your device, although it's still currently in heavy development.
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.
Phoner provides business owner, sales people, lawyers, doctors, police officers and others with a second phone number to protect their identity and also gives the convenience of multiple phone numbers on one device.
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.
KakaoTalk is a phone number based messenger service that allows users anywhere in the world to chat one-to-one or in a group for free. (no SMS service)
Safe, Fast And Decentralized Messenger.
Zangi Private Messenger is a decentralized messaging app with a focus on security and low data usage.
Coccinella is a free and open-source cross-platform instant messaging client with a built-in whiteboard for improved collaboration with other people.
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