Yes, both GitBook and KnowledgeBase offer a Free Trial.
GitBook is designed for Large Enterprises, Medium Business and Small Business.
KnowledgeBase is designed for Large Enterprises, Medium Business and Small Business.
Pricing for GitBook Starts at $6.40/User/Month when Billed Yearly whereas for KnowledgeBase Starts at $59/Month.
Some top alternatives to GitBook includes Confluence, simplewiki, Zoho Wiki, Drupal Wiki, TWiki, Wiki Valley, MeisterNote, Team Wiki, Obsidian and Dokit.
Some top alternatives to KnowledgeBase includes KBPublisher, SmartSupport, KnowledgeBase Manager Pro, Omnistar Kbase, Talisma KnowledgeBase, IntelligenceBank KM, Helpjuice, KnowledgeOwl, Qualified, Workvivo, PaceKB and ProProfs Knowledge Base.
