Yes, both Dropbox Business and Sendible offer a Free Trial.
Dropbox Business is designed for Large Enterprises, Medium Business and Small Business.
Sendible is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Dropbox Business Starts at $12.50/Month whereas for Sendible Starts at $25/Month when Billed Yearly.
Some top alternatives to Dropbox Business includes CollaborateCloud, Google Workspace, Odrive, Sync.com, Google Drive, FileCloud, Box, Microsoft OneDrive for Business, Dropbox Professional and BluSync.
Some top alternatives to Sendible includes Zoho Social, Crowdfire, SocialBee, Loomly, Hootsuite, Sprout Social, Planable, SocialMgr, Later, SocialPilot, Spredfast, Socialdraft, CloudSocial, SocialHub and SendPilot.