[blasdel]

Redshift is a column-store database for big analytics workloads and has a lot of very big established competitors, though the cloud space for that is mostly startups. There's a number of products that are really storage backends for postgres, or use its SQL parsing frontend.

What's different about Clustrix compared to all the other distributed databases branding themselves as "NewSQL" is that it's intended for totally traditional OLTP workloads (though it can distribute OLAP queries across the cluster too as a bonus).

Disclaimer: I work there