Yeah there are a few in that category also Google Cloud Spanner and the stuff by CitusData. All of them work, but are prohibitively expensive to get started. I've harangued them a number of times about how people aren't going to want to use something they can't scale up from $1/month to $10000/month without migrating any data (that's the whole point of an auto-scaling horizontal service imo), but so far no changes from them. Like why would you design potentially infinite auto-scaling, and then lock it up behind a $90/month minimum fee. They could have been making money all along on those $20/month or $40/month or $5/monthers, who vastly outnumber those who _need_ autoscaling, but what the peace of mind that auto-scaling provides.