The top 5 I have experience with - * Stripe - Great selection of currencies to accept * Braintree - Great developer API * Helcim - Best pricing * BitPay - Ea

The top 5 I have experience with - * Stripe - Great selection of currencies to accept * Braintree - Great developer API * Helcim - Best pricing * BitPay - Easy Bitcoin integration, versatile API * Coinbase - Get started accepting Bitcoin in seconds The last 2 are Bitcoin focused!