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When PayPal launched its newest mobile payment platform, it joined a wide selection of existing services. Here's a breakdown of the leaders.

Popular mobile transaction startup Square's new app goes well beyond simply accepting payments.

Mobile payment systems such as Swipe, Pay Anywhere and Square offer merchants free readers, apps, activation and cancellation.

Small businesses are embracing new mobile payment systems, allowing them to make sales without the high fees and long-term contracts associated with traditional credit card processing.

If you're thinking about accepting mobile payments, here's what you need to consider before getting started.

Looking into mobile payment applications for your business? Consider this comparison of the leading systems.

The popular mobile transaction application adds several new functions aimed at businesses.

'Geofencing' technology helps eliminate a customer's need to handle a credit card, or even a mobile phone, when making a purchase.

Twitter is quietly raising big bucks -- pegging the company's value at as much as $7 billion. What is Dorsey's secret?

Forget clunky credit-card processing systems -- all you need is a smartphone and a new device to cut card-processing expenses.

Tired of high credit-card processing fees? Here are three ways to save when accepting payments.

Being able to accept credit cards on the go has been a boon for businesses, but one payment processor says it can be risky.

Mobile-payment hardware lets your business accept credit cards through an iPhone, an Android handset or another smartphone.

Entrepreneur explores the innovation behind three companies -- Foursquare, Square and Zappos.