Now I want more competitors for platforms like Heroku just so that they can put their prices down. Heroku is great, but it is crazy expensive. Furthermore, I don't see any signs of Heroku lowering their price at all.
Is Heroku really that expensive? I use their new $7/month instances and I have no complaints with performance and features. $50/month for a managed Postgres database is a bit expensive but other cloud storage options like Cloudant (use the service in same AWS region as Heroku) can be very reasonable.
I'm sorry but at $20/mo for basic SSL, you can easily spend $40/mo on Heroku for ONE app, almost $500/yr!
A private VPS with enough resources for 4 of those same apps would be 2-4X cheaper.
If your time is so valuable that you can waste money like that, congratulations, but many of us find halving a price and learning marketable skills in the process to be valuable.
Speaking as one of the Dokku maintainers, that is a false statement.
Security, true isolation, the ability to easily scale horizontally and vertically, integrations into many services are all things Heroku offers that you need to work hard for in Dokku. Disregarding the fact that you need to maintain your own server(s) with Dokku, Heroku is tthe clear winner here.
The only thing Dokku offers people is the ability to save some money at the cost of their own time. Sure, I can manage just fine as I was maintaining my own servers anyhow - and know how - but honestly I already have a dayjob, why would I want to make my programming hobby more work?
It's expensive if you need decent performance - Isolated Dynos (i.e. running in their own EC2 instance) start at $250/month. We found that the shared Dyno options had significant noisy-neighbour problems.