VoltDB

VoltDB uses a shared-nothing architecture to achieve database parallelism, with both data and processing distributed across all the CPU cores within the servers composing a VoltDB cluster.

TigerGraph

TigerGraph is a native graph parallel database that is available both in on-premises and cloud versions.

Redis Enterprise

Redis is an in-memory, multi-model database platform.

NuoDB

NuoDB looks relational and leverages SQL but isn’t relational under the covers.