Or just use salesforce. Skip the other platforms. No need to re-invent the wheel. Just do custom dev in SF for your tracking needs, and don't run multiple platforms in the first place.
If you think you can replicate one of their core products by yourself or with a small team good luck.
Say AI enough times and your might even have a VC throw money at you.
Of course realistically your not beating SF, but your free to try.