Celus was created by Big Dig Data, a private company registered in the Czech Republic, in cooperation with the Czech National Library of Technology.
Celus was developed as an open-source project for CzechELib, the Czech national consortium of academic libraries. The acronym “Celus” stands for “CzechELib Usage Statistics.” Big Dig Data is also an active member in Project COUNTER's Technical Advisory Group, enthusiastically participating in the development of the COUNTER Code of Practice (COP5).