Yes, both Nuclino and Slite offer a Free Trial.
Nuclino is designed for Large Enterprises, Medium Business and Small Business.
Slite is designed for Freelancers, Medium Business and Small Business.
Pricing for Nuclino Starts at $5/User/Month when Billed Yearly whereas for Slite Starts at $6.67/User/Month when Billed Yearly.
Some top alternatives to Nuclino includes ClickUp, Trello, Confluence, CollaborateCloud, Airtable, Microsoft SharePoint, Collabee, Slab, Notion, Slite and Witeboard.
Some top alternatives to Slite includes Confluence, Notion, GitBook, Zoho Wiki, Drupal Wiki, LearnLode Enterprise, TWiki, Teamemo, Wiki Valley and Team Wiki.