Top Alternatives to Bitmessage

Adium is a free and open-source instant messaging client for macOS, designed to connect to multiple chat networks simultaneously. Supporting protocols like Jabber (XMPP), Google Talk, AOL Instant Messenger (AIM), ICQ, MSN Messenger, and Yahoo! Messenger, Adium provides a unified interface for all your conversations.

Tox is a free, open-source, and secure peer-to-peer instant messaging and video calling protocol designed for strong privacy and censorship resistance. It provides end-to-end encrypted communications without reliance on central servers.

Signal is a secure, open-source messaging application that uses end-to-end encryption to protect user communications. It offers text messaging, voice and video calls, group chats, and file sharing, all with a strong focus on privacy and security. Available on multiple platforms, Signal is a leading choice for individuals prioritizing confidential conversations.

RetroShare is a secure, decentralized, and open-source communication platform built on a friend-to-friend network, offering encrypted file sharing, serverless email, instant messaging, and forums.

Psi is a robust, open-source instant messaging client built on the XMPP protocol. It's known for its focus on speed, efficiency, and adherence to XMPP standards, offering a clean interface and strong privacy features for secure and reliable communication.

Ring (SFLphone) is a free and open-source communication platform offering secure messaging, voice, and video calls. It leverages decentralization and end-to-end encryption for enhanced privacy across multiple operating systems including Linux, Windows, macOS, and Android.

ChatSecure is a privacy-focused messaging application for iOS that leverages the robust and decentralized XMPP protocol. It offers strong end-to-end encryption using OTR and OMEMO, ensuring confidential communication.

Gajim is a free and open-source instant messaging client for the XMPP protocol. Built using the GTK+ toolkit, it offers a wide array of features for secure and flexible communication, including encrypted chat, group conversations, multi-protocol support via gateways, and extensive customization options.

Off-the-Record Messaging (OTR) is a cryptographic protocol designed to provide secure, end-to-end encrypted instant messaging conversations for enhanced privacy and security.

Threema is a secure and private messaging application that prioritizes user anonymity and data protection. It offers end-to-end encryption for all messages, calls, and files, requiring no phone number registration to enhance privacy.

TorChat is a defunct decentralized anonymous instant messenger leveraging Tor hidden services for secure text communication and file sharing without central servers.

Bit Chat is a secure, open-source, peer-to-peer instant messenger platform that prioritizes user privacy and security through robust end-to-end encryption and a decentralized network architecture. It empowers users with direct, encrypted communication, bypassing central servers and enhancing resistance to surveillance and censorship.

Echoplexus was a web-based, anonymous chatting platform designed with user privacy as a core principle. It offered IRC-like functionality along with modern features like video chat and file sharing, aiming to provide a secure and private communication space without the need for user registration.

Wickr is a secure and private instant messaging platform designed for individuals and teams who prioritize confidentiality. It offers end-to-end encryption, self-destructing messages, and a focus on anonymity to ensure that conversations and shared data remain protected.

Ricochet is a peer-to-peer instant messaging application designed for maximum privacy and anonymity. It leverages the Tor network to connect users directly, eliminating the need for central servers and reducing metadata leakage.

Pidgin-Encryption is a plugin for the popular Pidgin instant messaging client that provides transparent, end-to-end encryption for your conversations using RSA.