Wavefront is another public user. If you poke around on the forums and Google peoples' names you can see where they work. There are a number of large companies

Wavefront is another public user. If you poke around on the forums and Google peoples' names you can see where they work. There are a number of large companies you have definitely heard of in a variety of domains including ad-tech, analytics, gaming, and logistics who are evaluating or using FoundationDB in production. FoundationDB can replace ZooKeeper or etcd. Not literally of course, given their APIs vary wildly, but you can achieve the same semantics. Plus you get arbitrary conversational transactions instead of just things CAS.