Yes, both Pivotal Tracker and Pantheon offer a Free Trial.
Pivotal Tracker is designed for Large Enterprises, Medium Business and Small Business.
Pantheon is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Pivotal Tracker Starts at $6.50/User/Month whereas for Pantheon Starts at $29/Month.
Some top alternatives to Pivotal Tracker includes Quickbase , Smartsheet, ClickUp, Zoho Projects, Jira, Wrike, TeamGantt, Teamwork, ProjectManager.com, Microsoft Project, Backlog, Trackboard, Quick Base, Projectsly by 500apps, Height and Project Insight.
Some top alternatives to Pantheon includes Super, Qualified, Workvivo, AirOps, Webapp.io, OpsTech, SuperOps PSA Software, WebEnliven Solutions, DEITY Falcon, WordOps and IFTTT.