[throwaway2016a]

I too would like to know what the thought behind this question is. They are a well established company that runs 2FA and awesome phone apis / systems for thousands of startups and large companies in a field that is high barrier of entry (less competition) and predictable profits since they meter their usage.

The only thing I can think of is if a competitor enters the space and blows them away. In which case, there is your answer, you go to whomever blew them away.

I can't imagine a lawsuits or something like that taking them down at this point. They have been around too long, it would have happened already.

[throwaway2016a]

Adding to my own post (and thinking out-loud)... I can potentially imagine an acquisition and the acquiring company deciding to shut it down.

But the chances of that are so remote I'd still feel comfortable putting mission critical systems on it.

[JustSomeNobody]

While not exactly the same thing, people didn't think Parse was going to shut down ... until it did.