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The Green SheetGreen Sheet

The Green Sheet Online Edition

August 12, 2013 • Issue 13:08:01

Readers Speak

Seeking a list of top ISOs

At one time, I think you published a listing of ISOs - maybe the top 50 or something like that. Does that sound familiar, and do you know how I could get that information?

Doug Ainsworth Merchant Level Salesperson

Hi Doug,

We do not maintain a list of the top 50 ISOs. We do publish a guide each year in which many leading ISOs are listed. We do not rank them, however. To view the 2013 Buyers Guide, visit www.greensheet.com/ebooks/gsqv16n1/index.html.

Also, we publish a report on top acquirers in the December issue of our quarterly, GSQ, each year. Officially, only acquiring banks are acquirers, but people in the industry typically use the term "acquirer" to refer to the ISO channel in addition to acquiring banks.

The number of acquirers we discuss in GSQ varies, but it's usually 10. We rank them by processing volume. None of these companies is an acquiring bank, although some are merchant acquiring arms of banks.

Many on the list are involved in payment processing in addition to sales. Our 2012 Acquirers Report, located at www.greensheet.com/ebooks/gsqv15n4/index.html, listed the top 10 merchant acquirers as:

  1. First Data Corp., $1.6 trillion (including $530 billion from its partnership with Bank of America Merchant Services)
  2. Chase Paymentech LLC, $560 billion
  3. Vantiv LLC, $400 billion
  4. Elavon Inc., $310 billion
  5. Global Payments Inc., $165 billion
  6. Total System Services Inc., $95 billion
  7. Heartland Payment Systems Inc., $80 billion
  8. WorldPay, $55 billion
  9. TransFirst, $32 billion
  10. iPayment Inc., $20 billion

The Nilson Report, www.nilsonreport.com, publishes a list of the top 50 U.S. acquirers each year. Unlike The Green Sheet, Nilson does not provide information for free.

Also, TopCreditCardProcessors.com ranks the top 30 "credit card processing services" each month. It evaluates businesses based on an extensive list of criteria. Companies pay to be evaluated, but it appears the process is impartial. Thank you for relying on The Green Sheet. Best of luck in finding an ISO that suits your needs.


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Notice to readers: These are archived articles. Contact names or information may be out of date. We regret any inconvenience.

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