Jack Dorsey

BY Diana Ransom

The social-media site that's found its way into practically every entrepreneurs' toolkit recently turned seven. Here, we chat with the site's co-founder and get his best tips for newbie founders.

Twitter Co-founder Says He'd Run for NYC Mayor Someday

BY Catherine Clifford

Jack Dorsey wants to run the Gotham City. Whether or not you want to take on politics in your own career, here are three lessons any entrepreneur can learn from the Twitter co-founder, who has been called the "intellectual successor" to Steve Jobs.

PayPal Here Joins Mobile-Pay Apps Already There

BY Gwen Moran

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

For Some Businesses, Square Register Can Replace Traditional Point-of-Sales Tools

BY Jonathan Blum

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

How Dwolla is Building Its Brand by Giving Away Cash

BY Shira Lazar

Dwolla's rise as a payment alternative to credit cards isn't thanks to merchants' disdain for plastic alone. Here's how the company's founder used clever social-media strategies to build buzz.

Transforming Business with Mobile Payments

BY Jennifer Wang

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.

There's Something About Jack Dorsey

BY Diana Ransom

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

Here Come the Gatecrashers

BY Bryan Keplesky

The international Interactive, Film and Music Festival called South By Southwest begins today. And it's all about you.