This is for sure the most frequent question we get every time we talk to somebody about Nelio A/B Testing. Why a service? Why not just a (standalone) plugin? (in case you’re not familiar with Nelio’s architecture, the Nelio plugin on WordPress.org works as a kind of front-end for our backend services where the actual data collection and computation of the results takes place).
The short version of our answer is part of our existing FAQ but since, clearly, this topic is a concern for many of you we have elaborated more on the reasons why, in fact, WordPress services are a better option than plugins for you and even end up being a cheaper alternative.