[brazeon]

So how this works with federation? I don't see any open/common API.

[rekoros]

It's "federation-as-a-service", basically.

A common use case is federation between two Slack teams (share a channel).

Another common use case is federation between a group in Skype and a channel on Slack.

Or IRC and Telegram, etc.

Making existing systems work together really well is priority one. API only makes sense once that's done.