Start.coop (https://www.start.coop/ https://www.start.coop/) comes to mind, but I know I've read about others as well. I don't recall what their exact model is,

Start.coop (https://www.start.coop/ https://www.start.coop/) comes to mind, but I know I've read about others as well. I don't recall what their exact model is, so it likely doesn't match perfectly with what you're describing.