Ask HN: Where do you store your data?

We are a data analytics startup that is starting to greatly expand the amount of data we collect, analyze and produce.

So far our needs have been met by storing the data on disks attached to the VPS instances we use (Digital Ocean for us) but we are quickly outgrowing this. We use both MySQL as well as MongoDB and have looked into services like Amazon RDS and Cloudant.

If you're a startup of similar size, how and where do you store your data?