Twitter, of all companies, could enter the crowded instant messaging space dominated by WhatsApp, Viber, Apple, Google, Microsoft and Facebook with a standalone direct-messaging app. According to a new report Thursday, the company plans to "significantly update its direct-messaging product".
One of the options being considered is making Twitter's Direct Messages the focus of the rumored standalone app. It wasn't immediately clear how exactly such an app would compete with Viber and WhatsApp, the two leading services in the instant messaging space that tie to your cell phone number...