Bitmessage is a decentralized, encrypted, peer-to-peer, trustless communications protocol that can be used by one person to send encrypted messages to another person, or to multiple subscribers.
License: Open Source
Adium is primarily an instant messaging client that supports multiple protocols and focuses on user experience, while Bitmessage is a decentralized messaging protocol designed for secure and private communications. Adium is ideal for users looking for a versatile chat client, whereas Bitmessage is better suited for those prioritizing privacy and encryption.