Tariffs for the use of an interpreter are quite low, so everyone will be able to choose the option that suits him. Cosysay rates are different in that at the sight of the cost you will feel the desire to buy translator.
Tariffs established in favor of the buyer - the more buy a package, the lower the cost, which again confirms the availability of each of the tariff plan. Furthermore, Cosysay tariffs charged by any convenient payment system. Order translate can be different.