Yes, both TweetNest and Solidinbox offer a Free Trial.
TweetNest is designed for Large Enterprises, Medium Business and Small Business.
Solidinbox is designed for Large Enterprises, Medium Business and Small Business.
Pricing for TweetNest Starts at $15.99/Month whereas for Solidinbox Starts at $29/Month.
Some top alternatives to TweetNest includes FollowerSearch, BuzzSumo, Twitter Analytics, NetBase, Twitonomy, Planable, Hypegrowth, SocialBee, BTweeps, Twitter Ads, Tweelog and Tweepsmap.
Some top alternatives to Solidinbox includes hivoe, Twitter Ads, Mention List, Tweet Niche, Qualified, BypassDM, Workvivo, SuperDMs, Create Target Audience and IFTTT.