Mesh is described as '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' and is a instant messenger in the security & privacy category. There are more than 50 alternatives to Mesh for a variety of platforms, including Linux, Android, Windows, Mac and iPhone apps. The best Mesh alternative is Signal, which is both free and Open Source. Other great apps like Mesh are Telegram, Element, Pidgin and Tox.