Yes, both Flow and Smartsheet offer a Free Trial.
Flow is designed for Large Enterprises, Medium Business and Small Business.
Smartsheet is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Flow Starts at $6/User/Month when Billed Yearly whereas for Smartsheet Starts at $9/month when yearly.
Some top alternatives to Flow includes Quickbase , Smartsheet, ClickUp, Zoho Projects, Wrike, TeamGantt, Teamwork, ProjectManager.com, Microsoft Project, ProWorkflow, Trackboard, TaskBranch, Quick Base, Height, Task Flow and Project Insight.
Some top alternatives to Smartsheet includes Quickbase , ClickUp, Zoho Projects, Jira, Microsoft PPM, Trello, TeamGantt, monday.com, Asana, Teamwork, ProjectManager.com, Microsoft Project and Airtable.