Yes, both Mention List and FollowerSearch offer a Free Trial.
Mention List is designed for Large Enterprises, Medium Business and Small Business.
FollowerSearch is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Mention List Starts at $16.58/Month when Billed Yearly whereas for FollowerSearch Starts at $14.50/Month when Billed Yearly.
Some top alternatives to Mention List includes Twitter Analytics, Twitonomy, Mention, Planable, SocialBee, Mentioned, Twitter Ads, Tweet Niche, Create Target Audience, Mentioned By and MentionMe.
Some top alternatives to FollowerSearch includes BuzzSumo, Twitter Analytics, NetBase, Followerwonk, Twitonomy, Tweet Archivist, SocialTracker, Planable, SocialStats, SocialBee, Tweetastic and Tweepsmap.