This document reports on the current status of ESAP, the ESFRI Science Analysis Platform. ESAP is a key part of the interface between the services delivered by the ESCAPE project and the scientific community: it will provide a unified mechanism by which users can discover and interact with the data products, software tools, workflows, and services that are made available through ESCAPE, and it is designed to be extensible and flexible to adapt to the emergent requirements of future projects. The development of ESAP is the fundamental activity of ESCAPE Work Package 5.