Yes, both Celoxis and Microsoft PPM offer a Free Trial.
Celoxis is designed for Large Enterprises, Medium Business and Small Business.
Microsoft PPM is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Celoxis Starts at $25/month when yearly whereas for Microsoft PPM Starts at $10/User/Month.
Some top alternatives to Celoxis includes Quickbase , Smartsheet, ClickUp, Zoho Projects, Jira, Basecamp, Microsoft PPM, Wrike, monday.com, Asana, Teamwork, ProjectManager.com, Microsoft Project, Quick Base, Resource Management by Smartsheet and Height.
Some top alternatives to Microsoft PPM includes Quickbase , Smartsheet, ClickUp, Zoho Projects, Wrike, monday.com, Teamwork, ProjectManager.com, ProProfs Project, Microsoft Project, ProWorkflow, Projectworks, RationalPlan, ProgressBoard, Quick Base and Project Insight.