Yes, both ProProfs Knowledge Base and StructHub offer a Free Trial.
ProProfs Knowledge Base is designed for Large Enterprises, Medium Business and Small Business.
StructHub is designed for Large Enterprises, Medium Business and Small Business.
Pricing for ProProfs Knowledge Base Starts at $0.30/Month when Billed Yearly whereas for StructHub Starts at $129/Month when Billed Yearly.
Some top alternatives to ProProfs Knowledge Base includes KBPublisher, SmartSupport, Talisma KnowledgeBase, HelpHub, KnowledgeOwl, Qualified, Workvivo, PaceKB, KnowledgeBase, Whatis, IFTTT and StructHub.
Some top alternatives to StructHub includes KBPublisher, SmartSupport, Talisma KnowledgeBase, HelpHub, KnowledgeOwl, Qualified, Workvivo, PaceKB, KnowledgeBase, Whatis, ProProfs Knowledge Base and IFTTT.