Yes, both Growcia and Later offer a Free Trial.
Growcia is designed for Large Enterprises and Medium Business.
Later is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Growcia Starts at $14/Month whereas for Later Starts at $12.50/Month when Billed Yearly.
Some top alternatives to Growcia includes Zoho Social, Crowdfire, SocialBee, Planable, SocialMgr, Later, SocialBu, MavSocial, Socialdraft, Broadcast, CloudSocial, SocialHub, Social Aider, Send Social Media and SocialHuge.
Some top alternatives to Later includes Zoho Social, Crowdfire, SocialBee, Social Insight, Postcron, SocialMgr, SocialPilot, Sked Social, Socialdraft, InoSocial, CloudSocial, SocialHub and SocialGest.