Yes, both Trello and Pivotal Tracker offer a Free Trial.
Trello is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Pivotal Tracker is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Trello Starts at $5/User/Month when Billed Yearly whereas for Pivotal Tracker Starts at $6.50/User/Month.
Some top alternatives to Trello includes Basecamp, Wrike, Smartsheet, Zoho Projects, monday.com, Asana, Teamwork, ProjectManager.com, Microsoft Project, Worksuite, Trackboard and Height.
Some top alternatives to Pivotal Tracker includes Wrike, Smartsheet, TeamGantt, Teamwork, ProjectManager.com, Microsoft Project, Backlog, Trackboard, Projectsly by 500apps, Height and Project Insight.