The US Dollar (USD) is the official currency of the United States, issued by the Federal Reserve. It is the world's most held reserve currency and the most widely used currency in international trade, which means most cross-border transfers are priced against it at some point in the transaction chain.
For diaspora senders, the US Dollar is usually the starting currency: money earned in the US, converted into a recipient's local currency abroad. Grey shows the mid-market USD rate for each supported currency, the fee separately, and the exact local-currency amount your recipient receives.