Yes, both GatherContent and WriterAccess offer a Free Trial.
GatherContent is designed for Large Enterprises, Medium Business and Small Business.
WriterAccess is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for GatherContent Starts at $99/Month whereas for WriterAccess Starts at $39/Month.
Some top alternatives to GatherContent includes Posted, Concrete5, EasyContent, ContentPro, NinjaContent, Contentpace and Content OS.
Some top alternatives to WriterAccess includes Worksuite, Skyword, ContentPro, NinjaContent, TypeJust and TalentDesk.io.