I&#x27;m working on an interesting project right now where the web application behaves like a typical SaaS solution, except that all of the customer&#x27;s data is hosted on premises.<p>After the initial install, their local servers (and data) don&#x27;t have to be touched, but the SaaS portion can be continuously improved. So far it&#x27;s worked really well.<p>Your MSaaS idea sounds really interesting, especially the multiple trusted deploys. That&#x27;s the crux of trusting deployed open source software.