openrail and Dokku
Dokku is a long-standing single-host Heroku-style tool driven by git push and a CLI; openrail adds a web canvas and multi-host replicas.
Facts as of 2026-10-22, from Dokku's docs.
| openrail | Dokku | |
|---|---|---|
| License | AGPL-3.0 server, MIT CLI | MIT |
| Web UI | Yes | No (Dokku Pro is paid) |
| Deploy | GitHub, image, openrail up | git push, images |
| Builds | Railpack or Dockerfile | Heroku buildpacks, Cloud Native Buildpacks, Dockerfile |
| Multi-server | Built in | K3s or Nomad scheduler, optional |
| Replicas | Across hosts | ps:scale web=N |
| Databases and backups | Built in | Plugins |
| Zero-downtime deploys | Yes for services without a volume | Yes, with default checks |