FollowerSearch offers Free Trial, but Tweetastic does not.
FollowerSearch is designed for Large Enterprises, Medium Business and Small Business.
Tweetastic is designed for Individuals, Medium Business and Small Business.
Pricing for FollowerSearch Starts at $14.50/Month when Billed Yearly whereas for Tweetastic Starts at $8.33/Month.
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 Tweetastic includes Crowdfire, SocialBee, Social Opinion, Twitonomy, Buffer, Zoho Social, Hootsuite, Planable, Later, Analyser PRO, Socialdraft, CloudSocial, SocialGest, Send Social Media and yatta! analytics.