Checkout Hatchbox.io, just started using it myself. You basically pay a flat monthly rate for their Heroku-esque management service and then pay for the servers on your provider of choice separately (e.g. DO, AWS, etc).
Are you finding it mature enough to "just work"? The reason someone pays for something like heroku is they put a high value on "just work", I am really not looking to be troubleshooting weird bugs or figuring out weird edge cases in my ops, that's the whole point here!
I'll take a look, it definitely looks interesting, thanks!
Hard to say because I've only been using it for a week, but so far it has just worked (which is what I am looking for as well, I don't have the time or patience for anything less).
I've been looking for something between Heroku (too expensive, too many features) and Dokkku (too much hassle, I have to maintain my own security and patches) and this looks like exactly the thing I wanted, except it looks like it's only for Ruby? I use a combination of Python, Elixir, and Haskell, so I'd love it if they did support other langs.
Take a look at digitaloceans new app platform or render.com. Render allows you to run distributed Elixir, which is nice. And with digitalocean, if you outgrow app platform you could just move to their hosted k8s.
These both are k8s under the hood but with everything extracted away to a heroku level, but much cheaper. Additionally, they both provide static site hosting like netlify.
I'll take a look, it definitely looks interesting, thanks!