Which payment gateway should I choose from among Authorize.net, PayPal & Google Checkout?
Is there anything wrong if I provide all ? I'm planning for express checkout methods in all the three services, the direct credit card accepting service.
Paypal is of course the most well known and respected, however the answer actually depends on the amount of revenue your company will make (monthly and yearly averages), the average price per transaction and the number of debit card vs credit card payments you are likly to take. Without these figures it's nigh on impssible to determine which one is cheapest for you.