Yes, both Notion and ClickUp offer a Free Trial.
Notion is designed for Individuals, Freelancers, Medium Business and Small Business.
ClickUp is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Notion Starts at $4/Month when Billed Yearly whereas for ClickUp Starts at $7/User/Month when yearly.
Some top alternatives to Notion includes Jira, Knote, Trello, Confluence, Asana, Easynote, ClickUp, TWiki, MeisterNote and Zenkit Hypernotes.
Some top alternatives to ClickUp includes Basecamp, Trello, TeamGantt, Asana, Teamwork, ProjectManager.com, ProWorkflow, nTask, Todoist and Height.