I used to use it for side projects (not sure if you would count that as "production") but now go with Dokku on top of Hetzner or Digital Ocean. It's similar in

I used to use it for side projects (not sure if you would count that as "production") but now go with Dokku on top of Hetzner or Digital Ocean. It's similar in experience to Heroku (at least the CLI) but much cheaper, and as it's my own VM if I hit a limitation in Dokku I can access the VM itself or just throw away Dokku entirely and use something else instead. The major limitation is that it doesn't really do multi-server setups well, but for the wheelhouse of low-traffic simple applications it's great.