I’m also interested in this. I have 4 decent sized applications I want to migrate, but I don’t have the resources to self host on GCP or AWS. K8s is nice in theory, but I know from experience it requires too much hand holding (let alone other managed services like a database and cache).
From what I’ve seen in the market, fly, render, and railway are the only real Heroku competitors. All seem to be missing a few critical pieces of functionality that is preventing me from migrating. Railway doesn’t appear to allow me to remotely run Python commands, they also don’t have automated nightly backups. Fly and Render respectively have a handful of missing features. It would be amazing if one of these services came out with 1:1 feature parity with Heroku. I’d move in a heartbeat.
Azure web apps is pretty similar to heroku and I find it very easy to use. It has had a Linux version (instead of Windows) for quite a while now and it's pretty solid. Haven't had many real issues with it in many years of use.
They also have managed postgres db with very powerful tools.
From what I’ve seen in the market, fly, render, and railway are the only real Heroku competitors. All seem to be missing a few critical pieces of functionality that is preventing me from migrating. Railway doesn’t appear to allow me to remotely run Python commands, they also don’t have automated nightly backups. Fly and Render respectively have a handful of missing features. It would be amazing if one of these services came out with 1:1 feature parity with Heroku. I’d move in a heartbeat.