Dokku is described as 'Docker powered mini-Heroku in around 100 lines of Bash'. There are more than 25 alternatives to Dokku for a variety of platforms, including Linux, Online / Web-based, Self-Hosted solutions, Mac and Windows. The best alternative is Heroku, which is free. Other great apps like Dokku are CapRover (Free, Open Source), Kubernetes (Free, Open Source), Rancher (Free, Open Source) and Docker Swarm (Free).
Heroku is a cloud application platform for Ruby, Rails, Node.js, Java, Python, Scala and Clojure web apps. Everything you need to build, run, and scale: Dynos: Run virtually any language at any scale. Database: Enterprise-grade Postgres as a service.
CapRover is an extremely easy to use app/database deployment & web server manager, PaaS, for your NodeJS, Python, PHP, ASP.NET, Ruby, MySQL, MongoDB, Postgres, WordPress (and etc...) applications! Seriously! Who should care about CapRover?
Rancher is an open source project that provides a complete platform for operating Docker in production. It provides infrastructure services such as multi-host networking, global and local load balancing, and volume snapshots.
Rancher Desktop is an open-source desktop application for Mac, Windows and Linux. It provides Kubernetes and container management. You can choose the version of Kubernetes you want to run. You can build, push, pull, and run container images.