- Advent International
- American Express
- A R C
- Auriemma Consulting Group
- ATB Financial
- Bill Me Later
- BMO Bank of Montreal
- Capital One Merchant Services
- Carlson Marketing Worldwide
- Chase Paymentech
- Coinamatic
- Crone Consulting, LLC
- CUTech, Inc.
- Dineromail
- E4X, Inc.
- eBillme & MODASolutions
- eFunds Corporation
- Equinox Partners
- Federal Reserve Bank of Cleveland
- Federal Reserve Bank of Philadelphia
- Firethorn
- Firstview
- First Annapolis Consulting
- Frost Bank
- Green Dot Corporation
- Heartland Payment Systems
- Hitachi Ltd., Information and Telecommunications
- HSBC
- HSBC Technology and Service USA
- Inter-Atlantic Group
- Jack Henry and Associates
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- Javelin Strategy & Research
- JCB International Credit Card Co
- John Hopkins University
- Korn/Ferry International
- MasterCard International
- MEI
- Mobilians International, Inc.
- Morris Advisors, Inc.
- Muhlbauer, Inc.
- NYCE Payments Network
- Oak Management Corporation
- Oliver Wyman Financial Services
- PayPal, Inc.
- Planet Payment
- Priva Technologies, Inc.
- Purepay
- Research In Motion
- Reunion Group, Inc.
- Revolution Money
- RewardsNOW
- SmartReply Inc.
- Tempo
- Thomas Weisel Partners
- TSYS
- US Postal Services
- VerdiCash, Inc.
- VeriFone
- Visa USA
- Visant Card Operations
- Weber Shandwick
- Western Union Payment Services
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