Yes, both KBPublisher and KnowledgeOwl offer a Free Trial.
KBPublisher is designed for Large Enterprises, Medium Business and Small Business.
KnowledgeOwl is designed for Large Enterprises, Medium Business and Small Business.
Pricing for KBPublisher Starts at $19/Month when Billed Yearly whereas for KnowledgeOwl Starts at $10,000/Year.
Some top alternatives to KBPublisher includes Zoho Wiki, SmartSupport, KnowledgeBase Manager Pro, Omnistar Kbase, Talisma KnowledgeBase, IntelligenceBank KM, Microsoft Azure, KnowledgeOwl, KnowledgeBase and ProProfs Knowledge Base.
Some top alternatives to KnowledgeOwl includes simplewiki, KBPublisher, SmartSupport, Drupal Wiki, Talisma KnowledgeBase, Microsoft Azure, HelpHub, GoGoWorx, KnowledgeBase and ProProfs Knowledge Base.