Social Crawlytics is free service used to scan website and provide reports on each page for all  major social networks.

They give you there plans out of which two are free and for the third plan which is for super large websites they ask you two contact them for information. As shown in the given image:

Start by logging-in with your Twitter Account. Click Login With Twitter.

It will ask for your permission to authorize Social Crawlytics to use your account. Authorize the app and you will be redirected automatically to your Social Crawlytics Dashboard.

Now enter the URL you want to analyze, click SUBMIT, follow few more steps and get statistical overview of progress of your articles which have fared across Facebook, Twitter, LinkedIn, Delicious, Google+ and Stumbleupon.