Yes, both Microsoft OneDrive for Business and Buffer offer a Free Trial.
Microsoft OneDrive for Business is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Buffer is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Microsoft OneDrive for Business Starts at $1.99 whereas for Buffer Starts at $5/Month when Billed Yearly.
Some top alternatives to Microsoft OneDrive for Business includes CollaborateCloud, Microsoft SharePoint, Onehub, ShareFile, Dropbox Business, FileCloud, Box, Citrix Content Collaboration, imDocShare and Microsoft 365.
Some top alternatives to Buffer includes Crowdfire, SocialBee, Zoho Social, Hootsuite, Planable, SocialMgr, Later, SocialBu, SocialOomph, Broadcast, InoSocial, CloudSocial, SocialHub and Postaside.
