Yes, both MentionMe and Posted offer a Free Trial.
MentionMe is designed for Freelancers, Medium Business and Small Business.
Posted is designed for Individuals, Medium Business and Small Business.
The starting price of MentionMe begins at $22.30/Month, while pricing details for Posted are unavailable.
Some top alternatives to MentionMe includes Social Opinion, Zoho Social, Zoomph, CloudSocial, Astute Social, Lately, Posted, Qualified, Workvivo, Blog To Social, Socital and IFTTT.
Some top alternatives to Posted includes Zoho Social, Crowdfire, SocialBee, Planable, SocialMgr, Later, Continuon, Socialdraft, Broadcast, CloudSocial, SocialHub, Send Social Media, Sociality.io, Social By Emovur and Blog To Social.