That's why I can't comprehend companies using SaaS solutions like Slack or HipChat for something as crucial as internal communication, that requires a connection to an external server to work. What's even more scary is the data leakage risk - with DDoS you know when something bad happens, because the service simply doesn't work, but with data leakage how can you tell? Every single conversation stored on a 3rd party server. It's ridiculous. Yes, they're well protected, but it's also much more inviting for hackers - once you breach it, you gain a massive amount of sensitive data about thousands of companies... Well, it seems nice UI and 3rd app integrations are more important than security and reliability these days I guess.