Pulse is a product of San Francisco-based Alphonso Labs.
If the purchase goes through, Pulse would join SlideShare as LinkedIn's other notable social media acquisition. LinkedIn also earlier bought Cardmunch, an iPhone app that transcribes pictures of business cards you’ve collected and adds them to iPhone's contact list.
According to a report in AllThingsD, LinkedIn will pay between $50 million to $100 million for Pulse.
Pulse says it has 20 million users who read more than 10 million stories a day. Last November the company reported that over 4 billion stories have been read using Pulse since the app was released in May, 2010.