Microblogging platforms like Twitter have skyrocketed in popularity as users read the mini-updates of their friends; Yammer brings this phenomenon to the workplace. With Twitter, users are asked, “What are you doing?” Yammer asks your colleagues, “What are you working on?”
Yammer won the $50,000 top prize for start-ups at TechCrunch50. Only people with a common email address can participate in order to 'follow' each other.
It’s far more friendly than a corporate intranet because it’s real-time and informal. It’s free until the company wants to officially integrate Yammer into their offices and claim networks as their own, at which point a price structure is employed.