Yes, both Pivotal Tracker and Backlog offer a Free Trial.
Pivotal Tracker is designed for Large Enterprises, Medium Business and Small Business.
Backlog is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Pivotal Tracker Starts at $6.50/User/Month whereas for Backlog Starts at $29.16/Month when Billed Yearly.
Some top alternatives to Pivotal Tracker includes Wrike, Smartsheet, TeamGantt, Teamwork, ProjectManager.com, Microsoft Project, Backlog, Trackboard, Projectsly by 500apps, Height and Project Insight.
Some top alternatives to Backlog includes Wrike, Smartsheet, TeamGantt, Teamwork, ProjectManager.com, Trackboard, TaskBranch, TestRail, Height and Project Insight.