Secure Online Payment Gateway Cardstream is an independent secure online Payment Gateway, processing credit and debit card payments for thousands of Merchants every day. Cardstream has over 10 years of experience within the ecommerce industry and offers the best possible rates and service for our Merchants. With the ability to process card payments for all the UK Acquirers, across all card types and for all worldwide currencies, Cardstream are also able to work with our Merchants and Acquirer partnerships to source the best possible rates for Merchant Accounts. Why Cardstream? Cardstream is integrated into most leading shopping cart technologies. This means that integrations require little to no technical work to be carried out by a Merchant. Cardstream's policy is to support integration into any technology required by any given Merchant at no extra charge. Configuration time for our approved partners varies; however, it can usually be accomplished in a matter of minutes.