All of them are targeting different markets and have potential.
The Acuitty Exchange is a Business to Business marketplace for buying and selling technology, IT, and consulting services.
Its objective is to disrupt the services market like Alibaba has disrupted the products market in China.
In the Acuitty marketplace, buyers would be able to find suppliers globally for technology and consulting services.
The marketplace would also provide a rating mechanism for creating trust between buyers and suppliers who do not know each other – a bit like the star ratings that buyers give to sellers on Amazon. In doing so, Acuitty will help technology service buyers across the world find the best suppliers in different geographies.
PS : I work at Acuitty.