Yes, both Slenke and Microsoft Project offer a Free Trial.
Slenke is designed for Large Enterprises, Medium Business and Small Business.
Microsoft Project is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Slenke Starts at $15/User/Month when Billed Yearly whereas for Microsoft Project Starts at $10/User/Month.
Some top alternatives to Slenke includes Quickbase , Smartsheet, ClickUp, Zoho Projects, Wrike, TeamGantt, monday.com, Teamwork, ProjectManager.com, Microsoft Project, ProWorkflow, Projectworks, Trackboard, Quick Base and Project Insight.
Some top alternatives to Microsoft Project includes Quickbase , Smartsheet, ClickUp, Zoho Projects, Freshbooks, Jira, Basecamp, Microsoft PPM, Trello, Wrike, monday.com, Asana, ProjectManager.com, Worksuite, Projectworks, RationalPlan, Quick Base, Resource Guru and Resource Management by Smartsheet.