As an Intercom customer ( perhaps paying too much ), it would be very helpful to see a basic feature comparison table and ideally an in-progress roadmap so that I may assess the opportunity costs for a possible migration. And if not a matrix, at least a simple list of top-level features, which I could not find in the docs.
For me, "Alternative", is a very loaded word that comes with an expectation of comparing the current scope of features offered by the aforementioned paid apps.
Best of luck!