Also something I've looked at, are you familiar with https://www.prefinery.com/ ? It seems to do what you're writing about (but have not used it myself).
yes.. I have checked out prefinery. I think it is okay. But I wanted to go deeper into the management of the beta to increase participation. So I ended up developing a new platform for my day job. Now I am thinking about launching it as a new service.
What are you using for your stuff.