Cost / License
- Free
- Proprietary
Application types
Platforms
- Mac
- iPhone
- iPad
- Apple Watch




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.




Kik is way more than just messaging. It’s the easiest way to connect with your friends, stay in the loop, and explore – all through chat. No phone numbers, just pick a username.








Quantum-resistant encrypted messaging, video/audio calls, and file transfers in the browser with optional registration and no downloads required.



Offers real-time chat with friends, supports group messaging, organizes contacts by favorites and categories, enables media sharing with GIFs and videos, provides customizable notifications, allows invite links, and is accessible on desktop or mobile for gaming sessions.




Open source Jabber (XMPP) client with multi-account support, clean and simple interface. Being both free (as in freedom!) and ad-free, Xabber is designed to be the best Jabber client for Android .




TeleGuard is the data-secure messenger from Swisscows. TeleGuard encrypts every message and all telephone calls with encryption algorithm currently available: SALSA 20. TeleGuard servers are located in Switzerland, they are not subject to the data protection laws of the EU /...




Fully open source instant messaging server and clients. No proprietary components or non-free dependencies. Backend in pure Go (GPL 3.0), with a command-line administration tool in python + gRPC. Clients for Android, iPhone, and Web - ReactJS (all licensed under Apache 2.0).




Quaternion is a cross-platform Qt5-based desktop IM client for Matrix, a reference desktop application using libQMatrixClient. Source code, issue tracker, roadmap etc. can be found at GitHub. Releases (with links to cross-platform source code archives, as well as binaries for...





A spin-off of the popular Jabber/XMPP client Conversations with automatic contact discovery.



Technitium Mesh is a secure, anonymous, peer-to-peer (p2p), open source instant messenger designed to provide end-to-end encryption. Primary aim of developing this instant messenger is to provide privacy which is achieved using cryptography and anonymity using Tor network.
