I think this is what you need: https://github.com/facebookarchive/planout https://github.com/facebookarchive/planout It’s just the bones of a factorial design

I think this is what you need: https://github.com/facebookarchive/planout https://github.com/facebookarchive/planout It’s just the bones of a factorial design framework for online experiments. It’s simple enough to copy/paste and roll yourself. Many have translated it into their preferred language.