Yes, both Papermind and Slite offer a Free Trial.
Papermind is designed for Large Enterprises, Medium Business and Small Business.
Slite is designed for Freelancers, Medium Business and Small Business.
Pricing for Papermind Starts at $19/Month whereas for Slite Starts at $6.67/User/Month when Billed Yearly.
Some top alternatives to Papermind includes CollaborateCloud, Airtable, ClickUp, Collabee, Portway, Slite, Slack, Glip, Appinall, Teams.cc by 500apps and Witeboard.
Some top alternatives to Slite includes Confluence, Notion, GitBook, Zoho Wiki, Drupal Wiki, LearnLode Enterprise, TWiki, Teamemo, Wiki Valley and Team Wiki.