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Connect with sales or support quickly.
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Industry Solutions

Solutions for any business.
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Custom Gift Card Processing

Your gift cards. Your logo.
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High-Speed and Wireless POS

The latest in POS terminals.
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Mobile Processing

Accept payments on your phone.
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Virtual
Terminal

Turn your PC into a POS terminal.
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About Mainstream Merchant Services

MainStream is a leading provider of merchant payment processing solutions. We provide a wide array of debit and credit card processing solutions, offering the best in custom gift card programs, POS terminals and credit card terminals, Web and PC credit card processing solutions and check conversion and guarantee services.
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