Worked at a company that considered Optimizely for one of their possible A/B solutions. We went with another vendor, but I then ended up writing an in-house sol

Worked at a company that considered Optimizely for one of their possible A/B solutions. We went with another vendor, but I then ended up writing an in-house solution that took about a month [w/o analytics]. It is very easy to implement this in-house so long as you own the systems and don't outsource [too much].