There are services who will do that for a fee--I have done it--and there are always local writers' groups where you can get free input from the other members.
Are you looking for free input, or for professional for-a fee critiquing?
I know it can be difficult. I started the first writers' group in my area about six years ago, and as far as I know it is still the only one within easy driving distance. If you cannot find a local writers' group where you can attend regularly, you might check out the online writers' groups. I don't know the genre of your WIP, but there are groups online where people offer each other honest critiques. For example, if you are writing crime fiction, the Sisters In Crime organization has a group called GUPPIES (it stands for the Great UnPublished), where the members often critique one another's work.
Thanks, I have been looking online. I will check out the GUPPIES, because it is crime fiction. Thanks again.