Yes, both GitBook and Tettra offer a Free Trial.
GitBook is designed for Large Enterprises, Medium Business and Small Business.
Tettra is designed for Large Enterprises, Medium Business and Small Business.
Pricing for GitBook Starts at $6.40/User/Month when Billed Yearly whereas for Tettra Starts at $8.33/User/Month when Billed Yearly.
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 Tettra includes Zoho Wiki, KBPublisher, Drupal Wiki, TWiki, KnowledgeBase Manager Pro, Omnistar Kbase, Talisma KnowledgeBase, KnowledgeOwl, KnowledgeBase and ProProfs Knowledge Base.
