Why on earth is the backend written in 3 different languages? That's going to be hard for any team to maintain.

Also, this might work better on Flippa.

And, finally, there are a ton of tools that do this exact same thing, and many are mature and widely used. What's new about this?

For $50,000, I could get an enterprise account with an established marketing analytics firm for 6 months to a few years, depending on the provider.