Shopify adds 'buy now' button for Twitter users

Twitter users soon will be able to shop with a new "Buy Now" button from the e-commerce company Shopify.

Shopify says it is starting a partnership with Twitter that will allow U.S.-based businesses to sell products directly on the social media website. Any product tweeted from a merchant's store will include the buy button that allows customers to make a purchase within their Twitter timeline.

Canada-based Shopify has introduced similar buttons for Pinterest and Facebook.

Shopify Inc. works with merchants who want to offer their own online checkout services, providing a platform for small- and mid-size businesses that sell products online. Clients can use Shopify's software to handle sales made through mobile phones, the Web, and other means.

The company held an initial public offering of stock in May.