Off-the-Record Messaging (OTR) is a cryptographic protocol that provides encryption for instant messaging conversations. Developed by Ian Goldberg and the OTR Development Team
License: Open Source
Off-the-Record Messaging focuses on providing secure, ephemeral instant messaging with strong anonymity, while Bitmessage emphasizes decentralized, encrypted communication suitable for both public and private messaging. Both prioritize security, but Off-the-Record is more user-friendly for instant messaging, whereas Bitmessage offers a broader range of decentralized communication features.