As a general rule of thumb:
make sure you highlight one as "Recommended" or so (usually the second or third cheapest if you have 4-5 choices): it should be the one that fits most of your target and that you aim to sell (thanks to anchoring)
don't have 20+ plans: too many choices will stop buyers who will then leave, thinking they'll come back when they know more, but never come back in the end. Between 3 and 6 is be a good number imho.
Also, sort by price (or most important feature like "number of servers"), from the cheapest to the most expensive: that way, buyers tend to pay more attention to the price itself instead of reading all the small details, and tend to pick the recommended choice (or the one directly on the right or left); just make sure whichever property you sort by is the one in large bold font to highlight that it's the important part, that way buyers naturally assume that the furthest one offers the most features but is the most expensive, and that the first has the least features but cheapest.
Don't be surprised if the "most expensive" / "perceived as most features" choice is seldom chosen: most people want to think they pick the best features/price ratio and rarely pick the "every single options" choice (except for software where the idea is more "I want the full version of the program instead of the limited trial").
Similar example: if you want to borrow 20$, first ask for 50$, expect refusal, then ask for 20$ as alternative: it increases your chances compared to asking 20$ directly. If you can read french, this book has many other such examples.
But as another mentionned, the best to ease your mind is to make several versions and A/B test until you're left with the most effective version :-)