There are plenty of products that do Monte Carlo simulation in Excel. Here is one more: https://xllmonte.com. Do an A/B test if you are already using one and let me know if theirs is simpler, faster, or easier to use. My product does not have many bells and whistles, or even examples of how to use it other than a simple demo showing how to trade space for time in a spreadsheet. It is a stripped down version of what I’ve been using with my hedge fund clients over the years.
They love using it and told me I should spin off a commercial version. They have no idea how difficult it is to write software that works on versions of Excel in the wild. If you help me shake down the issues involved with this I would love to keep rolling out new functionality. What problem can it help you solve?