Yes, both KB Clip and ProProfs Knowledge Base offer a Free Trial.
KB Clip is designed for Large Enterprises, Medium Business and Small Business.
ProProfs Knowledge Base is designed for Large Enterprises, Medium Business and Small Business.
Pricing for KB Clip Starts at $59/Month whereas for ProProfs Knowledge Base Starts at $0.30/Month when Billed Yearly.
Some top alternatives to KB Clip includes simplewiki, SlimWiki, Zoho Wiki, SmartSupport, Qualified, Workvivo, KnowledgeBase, Whatis, Kbee, ProProfs Knowledge Base, You Need A Wiki and IFTTT.
Some top alternatives to ProProfs Knowledge Base includes KBPublisher, SmartSupport, Talisma KnowledgeBase, HelpHub, KnowledgeOwl, Qualified, Workvivo, PaceKB, KnowledgeBase, Whatis, IFTTT and StructHub.