Best Free and Open Source, Self-hosted PaaS

Swarmlet is a free and open-source, self-hosted Platform as a Service that runs on any single server. It's mainly intended for use with multiple servers, a server cluster / swarm. Swarmlet is inspired by Dokku and brings the same simplicity to Docker Swarm. Swarmlet also uses Traefik v2 and Let's Encrypt to provide automatic SSL and load balancing on your apps.

👍 Most people think this is a good recommendation.

Dokku is a free and open-source project that helps you build and manage the lifecycle of applications. With Dokku developers can setup their own PaaS (Platform-as-a-Service) in a matter of minutes. Dokku provides extra plugins which can be used to manage database, and tools needed for your application. If you need to server your application over HTTPS, Dokku got you covered as well, with the help of Let's Encrypts free TLS certificates.

👍 Most people think this is a good recommendation.

CapRover is an free and easy-to-use application deployment and server manager for NodeJS, Python, PHP, ASP.NET, Ruby, MySQL, MongoDB, Postgres, WordPress and more. With CapRover you can create your own PaaS (Platform-as-a-Service) similar to that of Heroku, and deploying it to your own cloud instance.

👍 Most people think this is a good recommendation.

Flynn is an open source platform (PaaS) for running applications in production. Flynn is designed to run anything that can run on Linux, not just stateless web apps. Flynn comes with highly available database appliances, including PostgreSQL, MySQL, and MongoDB. Flynn aims to be the only tool developers and ops teams need to develop, deploy, and manage running software.

👍 Most people think this is a good recommendation.