Oracle Essbase is a multidimensional analytics and planning platform. Business users, analysts and modellers analyse data in cubes, model business performance and run what-if scenarios. According to the documentation, you can work in Microsoft Excel through Smart View or in the built-in web interface with grid analysis, report scripts and MDX queries; cubes are built from Excel workbooks or tabular data. It also offers calculation functions, REST and Java APIs, and role-based security with cell-level filters.
Essbase is customer-managed: as a stack through the Oracle Cloud Infrastructure Marketplace, or as a standalone installation of Essbase 21c on your own infrastructure. Oracle is headquartered in Austin, Texas (US), so the vendor falls under US jurisdiction and the CLOUD Act may apply. You determine the hosting location yourself through your choice of OCI region or your own data centre. Oracle publishes a data processing agreement for its services and a separate one for its EU Sovereign Cloud. The product is not open source. Installing it yourself lets European organisations decide where the data sits.