Looks like an upstream issue with our DNS provider causes all seats.io subdomains to be down.

08:28:08 CEST: We can confirm this is a general problem with Gandi. They reported to be under a DDoS attack a little over an hour ago, and are working on resolving the problem: http://status.gandi.net/timeline/events/1308.

For seats.io, this means everything is down: app.seats.io, www.seats.io, but also this status page. We'll still update it for future reference.

09:05:32 CEST: Our own monitoring indicates some improvements, but we're waiting for confirmation from Gandi.

09:16:16 CEST: Our metrics tell us the problem is fixed, and that corresponds with what Gandi tells us on https://status.gandi.net/timeline/events/1308.
We're closing this incident for now, but will keep monitoring the situation of course. All systems are go.