Making assumptions here. Since yours is a "hosted" service, then your "enterprise-level" clients/users have no bearing on what platform you choose, right?. What

Making assumptions here. Since yours is a "hosted" service, then your "enterprise-level" clients/users have no bearing on what platform you choose, right?. What platform do you have expertise in? Sounds like you already have something working on PHP, so I take it you know it already, on it there are plenty of alternatives to CakePHP, from Fuel, CI, Zend (ooh, enterprisey!) and others. Have you heard that Facebook uses PHP? Do you need to handle hundreds of millions of users? If not, just about any platform you choose and have in-house expertise in should be able to handle it. Get the volume first, and when the platform becomes a problem, you should be really happy then, while crying all the way to the bank, worry about maybe hiring some experts in another, more scalable one?