Atlantis vs PythonAnywhere: What are the differences?
Developers describe Atlantis as "Open Source PaaS Built on Docker, by Ooyala". Atlantis is an Open Source PaaS for HTTP applications built on Docker and written in Go. It makes it easy to build and deploy applications in a safe, repeatable fashion, and flexibly route requests to the appropriate containers. On the other hand, PythonAnywhere is detailed as "Micro PaaS for Python web apps. Develop and host Python from your browser". It's somewhat unique. A small PaaS that supports web apps (Python only) as well as scheduled jobs with shell access. It is an expensive way to tinker and run several small apps.
Atlantis and PythonAnywhere can be categorized as "Platform as a Service" tools.
Atlantis is an open source tool with 381 GitHub stars and 33 GitHub forks. Here's a link to Atlantis's open source repository on GitHub.