Yes, both BuzzSumo and ShareSpring offer a Free Trial.
BuzzSumo is designed for Large Enterprises, Medium Business and Small Business.
ShareSpring is designed for Large Enterprises, Medium Business and Small Business.
Pricing for BuzzSumo Starts at $79/Month when Billed Yearly whereas for ShareSpring Starts at $50/Month.
Some top alternatives to BuzzSumo includes ListenFirst, Sprinklr, Hootsuite, Sprout Social, Planable, ShareSpring, Socialinsider, SocialBee, GetSocial, Nudge and Blogalyzer.
Some top alternatives to ShareSpring includes Crowdfire, SocialBee, Social Media Wall, Buffer, Zoho Social, Planable, Later, SocialBu, Aggreto, Broadcast, Social Mako, CloudSocial, SocialHub, Send Social Media and Posted.