Isn't Django a web framework like Elixir Phoenix that gives you the technical layers to build a web app? These are still great starting points for web apps but the examples[1][2][3] would be the ones I mentioned in my comment that give you the web app plus SaaS functions:
I'm pretty sure there isn't such a thing for Elixir.
And quite possibly there won't be something like it anytime soon, if ever. I get the impression that the Elixir 'ecosystem' is a bit more modular/manual in approach even when you compare Phoenix to Rails, which means, with all else being equal, a bit less of an out-of-the-box experience.
Of course in part this is because there are currently just fewer packages available for Phoenix. But I think it's also inherent to the 'culture'. It might never be as cookie-cutter in what it offers.
(but I'm still relatively new to the Phoenix/Elixir world, so I could be entirely wrong)
.net - https://aspnetzero.com/
ruby - https://bullettrain.co/
php - https://spark.laravel.com/
Yes, these aren't OSS but are the equivalents for elixir (if any)?