I am thinking of my own SaaS offer, but combined with Open Source. Basically, you will be able to publish a certain kind of application with a little bit of Javascript coding, and coding several lambdas in Golang. There will be an entire miniature server cluster running as goroutines, which you will be able to download off of github, then run locally. You will also be able to take the same server cluster and run it on a service like AWS. (On my roadmap, I'm going to remove all dependencies outside of the project, so you will pretty much be able to fill out the config file, and just run the executable, and have it scale according to the number of processors.

However, you will also be able to sign up for an account on my website, then use a command line facility to "inject" your lambdas into my system, which takes care of the autoscaling, database backup, and staging for you.