Yes, both Wikiful and Proceed.app offer a Free Trial.
Wikiful is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Proceed.app is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Pricing for Wikiful Starts at $10/Month whereas for Proceed.app Starts at $39/Month.
Some top alternatives to Wikiful includes simplewiki, SlimWiki, GitBook, Zoho Wiki, Drupal Wiki, TWiki, Wiki.js, Wiki Valley, Microsoft Azure and You Need A Wiki.
Some top alternatives to Proceed.app includes Synapse, Guru, Zoho Wiki, LearnLode Enterprise, TWiki, GoGoWorx, HuForce, XWiki, Zoho Learn and bundleIQ.