buddycloud

Open source tools, libraries and services for secure cloud & on-premise user and group messaging. Buddycloud is the only in-app messaging stack that can be run on-premises giving you total control over your security. This option is particularly popular with government, healthcare, finance and defense customers who for regulatory reasons must run services behind their firewall. Encryption of the Buddycloud message stream and the option to enable per-message end-to-end encryption means that your secrets stay secret.