RetroShare is described as «open source cross-platform, private and secure decentralized communication system. It lets you to securely chat, share photos, videos, and more, using OpenPGP to authenticate peers and » and is a very popular Encrypted Chat app in the social & communications category. There are more than 50 alternatives to RetroShare for a variety of platforms, including Windows, Linux, Mac, Android and iPhone. The best alternative is Signal, which is both free and Open Source. Other great apps like RetroShare are Element, Discord, Tox and Jami.RetroShare alternatives are mainly Group Chat Apps but may also be Encrypted Chat Apps or Video Calling Apps. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of RetroShare.