FollowerWonk

Followerwonk is a powerful suite of Twitter analytics tools which you can use to find influencers in your industry, find out when your audience is most likely to be active and engaged, find your most compelling tweets, and plan out your Twitter strategy. Track new and lost followers daily, plus compare followers of up to 3 accounts to find new audiences for your content. With Target Level access you can compare accounts with up to 1 million followers, and Analyze accounts with up to 300,000 followers, and download files of results with up to 10,000 rows of data. Take your Twitter game to the next level.