Yes, both FollowerSearch and BuzzSumo offer a Free Trial.
FollowerSearch is designed for Large Enterprises, Medium Business and Small Business.
BuzzSumo is designed for Large Enterprises, Medium Business and Small Business.
Pricing for FollowerSearch Starts at $14.50/Month when Billed Yearly whereas for BuzzSumo Starts at $79/Month when Billed Yearly.
Some top alternatives to FollowerSearch includes BuzzSumo, Twitter Analytics, NetBase, Followerwonk, Twitonomy, Tweet Archivist, SocialTracker, Planable, SocialStats, SocialBee, Tweetastic and Tweepsmap.
Some top alternatives to BuzzSumo includes ListenFirst, Sprinklr, Hootsuite, Sprout Social, Planable, ShareSpring, Socialinsider, SocialBee, GetSocial, Nudge and Blogalyzer.