I meet a lot of wantrepreneurs who are very smart but not at all into the plumbing of websites. They totally get concepts such as minimum viable product and split testing, and they want to be hands-on with the propositions and the copy. But definitely not with the pipes and joints.
As a recovering programmer, I tend to shy away from all-in-one web solutions. Even if they solve my problem today, I can always see how just around the corner I'll need more than is on offer. So my default answer involves them finding a friendly web developer, a CMS with a ready market in custom skins and some best-of-breed solutions to manage basic analytics and A/B testing.
That's still my answer for established products and services, but for new stuff... well, I'm not so sure.
So what are:
Existing all-in-one answers for CMS with full analytics and split testing?
Genuinely simple, robust combination solutions that don't require geek skills to manage?
Performable's 'Marketing CMS' is the nearest I can think of, but it seems to me over-rich in features and over-expensive for this kind of startup.