CommentTagMachine allows to: Auto Reply comment with tagging the commenter Auto comment your post by tagging all commenter Mentioning commenter in reply will make it more personalize and Notification will be sent to commenter. Auto comment on post by tagging all commenter- so all the commenter will get notification about your comment and see it.
Demo: https://codecanyon.net/item/commenttag-machine-a-fb-inboxer-addon-for-tagging-post-commenters-of-facebook-pages/21018774