CrowdTangle

From Gust.com:

"CrowdTangle lets organizations follow thousands of Facebook Pages and automatically see what content is performing the best. Customers can completely customize the Pages they're following, build their own feeds and have all the best content delivered straight to their inbox. We're 6 months into a private beta and already being used by some of the leading social teams in the country, including Upworthy, the White House, ESPN and USA Today/Gannett."

 CrowdTangle was acquired by Facebook in November 2016.