Yes, both Flow and Wrike offer a Free Trial.
Flow is designed for Large Enterprises, Medium Business and Small Business.
Wrike is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Flow Starts at $6/User/Month when Billed Yearly whereas for Wrike Starts at $0/user/month when monthly.
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 Wrike includes Quickbase , Smartsheet, ClickUp, Zoho Projects, Jira, Basecamp, Trello, TeamGantt, monday.com, Asana, Teamwork, ProjectManager.com, Microsoft Project and ProWorkflow.