NOD3x analyses Twitter and Google+. NOD3x offer a free service for Google+ users and there is a premium plan available for $9/mth. To integrate with Twitter it is $49/mth, You can track keywords and hashtags used on Twitter and track usage over time. NOD3x integrates with Buffer. You can quickly engage with discussions on your brand right on the dashboard. It shows you the top influencers for those keywords and the latest posts.