These are all very interesting alternatives.
Can't make a complete assessment on the third one since they don't publish their rates.
The first one seems to offer good value given that the quoted cost is for 'review' which I assume is for profile+all essays of one school instead of just one essay - You might want to clarify the scope with them. The only limitation I see is that you're limited to the number of advisors/consultants listed on their website, and that there is no phone call involved.
The second one seems to be a marketplace
platform that caters for those seeking 1) admission and 2) career advice. And theoretically you have lots of options provided they manage to sign up more advisors/consultants.