What is the difference between Hyperion, Hyperion Financial Management (HFM), and Essbase? What are some other alternative BI tools companies uses?

Hyperion is an Enterprise performance management software which has various modules like HFM, Hyperion Planning, Hyperion Profitability & Cost management etc. that covers different business areas or functions and helps in analytics.

Essbase is a multidimensional DB management system usually used to store the data from the above mentioned & to use for advanced analytics