> after talking to 100s of marketers, we realised that modern B2C marketers needed to leverage billions of customer data points from the data warehouse to run personalised marketing campaigns

I like this. You learned one of the most important lessons quickly. Get customers first and then build what they need.

Update: I just watched your demo, this is really fantastic work. A couple suggestions: 1) your demo is a tad bit fast and showing a lot of content, so it makes me have to stop the video and rewind. you obviously know the product too well. 2) for dropdowns with only one item (there are a few of them in your demo), don't make people click on it, just select the item, by default.