CELUS, hosted by Big Dig Data (the Czech Republic), allows libraries to use SUSHI to harvest COUNTER-compliant use data from databases, ejournal, and ebook platforms. It provides an easy-to-use dashboard with excellent tools for data manipulation. This open-source product may be downloaded for free if an organization prefers to run it itself, and it is also available as a hosted solution at a very reasonable cost.

After two cycles of subscription renewals using Celus to inform decision-making and report usage, we've really appreciated the easy set-up, the intuitive interface, the ease of use, and your responsiveness to questions and suggestions. The site looks good, which is helpful when reporting to management. Thanks Celus!

As CzechELib consortium leader, before Celus, we had to rely on statistics supplied by e-resource providers, which were only raw data and which were often provided late.

Using the same tools, all individual consortium members can analyse their own statistical data and can compare  this with anonymized data from other consortium participants. The reaction to the introduction of Celus was immediate, ranging from positive to enthusiastic.

The training we received during the software's implementation was exceptional, and we continue to be impressed with their ongoing technical support.

"CELUS makes it easy to view high-usage titles and titles with high turnaways. For example, I was able to dig into Cambridge University Press statistics and noted certain titles my library subscribes to that had high denial rates. I deduced that the turnaways were from years we did not have access to, so I went ahead and purchased back-file archives for those particular journal volumes."