Database-as-a-service (DBaaS) has become critical for all businesses to build and support modern business applications and operational systems. In our 27-criterion evaluation of DBaaS providers, we identified the 12 most significant ones — Alibaba, Amazon, EnterpriseDB, Google, IBM, Microsoft, MongoDB, Oracle, Rackspace, Redis Labs, SAP, and Tencent — and researched, analyzed, and scored them. This report shows how each provider measures up and helps enterprise architecture (EA) professionals select the right one for their needs.