Thanks for the response. My two cents: price is not the thing that I would compete on. For any "real" business, the cost of Heroku is negligible compared to its benefits; a few hundred dollars per month in savings is just not enough to convince most companies to migrate to a completely new service that isn't as battle tested and has fewer features. At the same time, I'm not convinced you could make any significant amount of money tailoring your service to side projects.
With that said, I think you have a great product and could probably make some decent money by offering some combination of niche features. Ideas off the top of my head:
* Integrated metrics. Since you're primarily targeting Django apps, it should be feasible to collect health/performance stats from the apps and display them in a simple dashboard. You don't need to offer very much here; most companies would be more than happy with basic stats related to response times per route, although SQL query times would be really neat to see.
* Automatic scaling for your Python projects. If you could apply the same ease of deployment to horizontal scaling, that would be really valuable.
* Easy integration with AWS services like S3, SES, and SNS. You could do this in a number of ways. One idea is to provide a set of Django libraries that, for instance, makes sending SMS messages super simple, with no configuration needed when used via Appliku. Or you could integrate with existing libraries and just remove the configuration step for the developer.
With at least one of the above (or some other differentiator), I could see Appliku taking off. In any case, you have a great product, and I wish you the best of luck!