bitchat is described as 'Decentralized peer-to-peer messaging app offering secure Bluetooth mesh communication, end-to-end encryption, channel-based chats, and privacy-first design' and is a popular instant messenger in the security & privacy category. There are more than 50 alternatives to bitchat for a variety of platforms, including Android, Linux, Windows, iPhone and Mac apps. The best bitchat alternative is Signal, which is both free and Open Source. Other great apps like bitchat are Telegram, Element, SimpleX Chat and Wire.