Tettra offers Free Trial, but TWiki does not.
Tettra is designed for Large Enterprises, Medium Business and Small Business.
TWiki is designed for and undefined.
The starting price of Tettra begins at $8.33/User/Month when Billed Yearly, while pricing details for TWiki are unavailable.
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.
Some top alternatives to TWiki includes simplewiki, SlimWiki, GitBook, Zoho Wiki, Drupal Wiki, LearnLode Enterprise, Wiki.js, Wiki Valley, XWiki and Team Wiki.