Absolutely!
It is hard to say as all these companies are the middle man and they charge their base fees and connect you with different skill level people; depends who you get connected with. I've been burned twice so be very careful spending your money. Never put up front money, get stuff in writing, talk to people on the phone and ask for proof that what they already built? See if they measure up to your standards. If money is not issue, go with well known brands/people, if it is then ask the developers for some referrals. This article helps a bit.. http://www.forbes.com/sites/theyec/2014/05/29/the-true-cost-...
Good luck!