One interesting thing which sets us apart is used for the CLI: a durable NATS JetStream consumer over websockets for clients to fetch all events (delivery attempts, side effects from rules and their actions etc). I built perch https://github.com/synqronlabs/perch, a tiny, single-binary mailbox server backed by mxRaven which can run behind CGNATs and firewalls on consumer devices effortlessly using this.
If you wanna check out what the mxRaven resources the sandbox uses (the listeners for instance) on the dashboard, use the credentials: Username: guest Password: c53A!@3qaMzM
in the workspace 'kush' on https://app.mxraven.com/login in the 'Open Workspace' option.