Quicksight, Yikes!! I checked that out, and it wasn't bad, but it didn't seem like it had any way to handle an associative model (multiple tables). Maybe I didn't look hard enough but I wasn't terribly impressed. The biggest advantage would be that if you already had data on AWS infrastructure, you could export it to Quicksight at a read rate far greater than at a remote location.
The QIX Engine, core of Qlik is unique. All others BI software works with relational model, but Qlik works with the associative model. It´s fast, in memory. Works with large distinct values on filter panels. You can even do global search on all your fields.
But all of this is nothing, if it doesn´t met the customer requirements. Perhaps they only need a nice dashboard, so others tool can be usefull too.
Qlik is an excelent tool to freely explore your data. If this is the main requirement, Qlik is the best choice.
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