Both RationalFX and CurrencyFair are solid, regulated and effective money transfer companies, giving high-street banks a good run for their money due to much cheaper rates and quick delivery. However, there are some distinctive differences between them. First and foremost, CurrencyFair is the only solution of the two available for the USA residents. In addition to that, the CurrencyFair’s unique peer-to-peer system allowing the lowest exchange rates possible, lower fee and a nominal minimum limit make it a winner in this battle.