Yes, both Popsters and Buffer offer a Free Trial.
Popsters is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Buffer is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Popsters Starts at $9.99/Month whereas for Buffer Starts at $5/Month when Billed Yearly.
Some top alternatives to Popsters includes Zoho Social, Crowdfire, SocialBee, Buffer, Planable, Later, SocialStats, Elementary Analytics, Analyser PRO, SocialScud, CloudSocial, Astute Social, SocialGest, Send Social Media and Sharemyinsights.
Some top alternatives to Buffer includes Zoho Social, Crowdfire, SocialBee, Hootsuite, Planable, SocialMgr, Later, SocialBu, SocialOomph, Broadcast, InoSocial, CloudSocial, SocialHub and Postaside.
