I once heard in an Alex Karp interview that they sold their products to other governments too(China and India IIRC). I found it quite odd, it would make sense to provide exclusive access to a particular government like the US or some other large country. This isn't a consumer product, it deals with a lot of sensitive data and i'm assuming a lot of governments would be wary of using the same product/company (especially one with 20 somethings at the helm).
edit: I'm not against 20-30 year olds running a company, but i'm assuming government officials would be.