Amazon MemoryDB vs. EDB Postgres Advanced Server

Amazon MemoryDB for Redis is a Redis-compatible, durable, in-memory database that delivers ultra-fast performance and Multi-AZ durability. With Amazon MemoryDB for Redis, you only pay for what you use with no minimum fee. A node is the smallest building block of a MemoryDB cluster. Each node supports varying amounts of computation and memory capacity, and you can select a node type based on your needs. You are charged based on three components: on-demand instance hours per node, volume of data written to your cluster, and snapshot storage that you use.

EDB Postgres Advanced Server (EPAS) is based on open source PostgreSQL, the world's most advanced open-source database management system. EPAS gives you the best of both worlds - all the advantages of PostgreSQL, enhanced with mission-critical features that help you maintain greater consistency across your PostgreSQL deployments. EDB Postgres Advanced Server extends PostgreSQL with the security and performance features that enterprises need. It is also Oracle compatible.