I invite you to read my article published today on the relative merits of contracting a translation agency vs an individual translator. Like many businesses, you have perhaps always assumed that a translation agency was the best option. And as I discuss in the article, an agency can bring you certain advantages.
But, as I also discuss, you should verify whether you are actually getting the added value that you believe the agency to be offering. For the reasons I examine, the option of contracting a translator directly may actually turn out to be a very viable, beneficial option for your business needs.