OMEMO is an end-to-end (e2e) encryption protocol that leverages the Double Ratchet encryption scheme to provide multi-end to multi-end encryption, allowing messages to be synchronized securely across multiple clients, even if some of them are offline. It is widely supported among XMPP clients, and some interest has been expressed in having it be supported in mellium.im/xmpp and Communiqué.

Support is not currently on the roadmap, but any dollars donated to this project will be awarded to the person or persons who implement OMEMO encryption.