Tinode is described as '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)' and is a Video Calling app in the social & communications category. There are more than 100 alternatives to Tinode for a variety of platforms, including Android, iPhone, iPad, Android Tablet and Windows apps. The best Tinode alternative is Signal, which is both free and Open Source. Other great apps like Tinode are Telegram, Element, Tox and WhatsApp.