Yes, both Trello and Redbooth offer a Free Trial.
Trello is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Redbooth is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Trello Starts at $5/User/Month when Billed Yearly whereas for Redbooth Starts at $9/user/month when yearly.
Some top alternatives to Trello includes Quickbase , Smartsheet, ClickUp, Zoho Projects, Freshbooks, Jira, Basecamp, Wrike, monday.com, Asana, Teamwork, ProjectManager.com, Microsoft Project, Worksuite, Trackboard, Quick Base, Todoist, Resource Guru and Height.
Some top alternatives to Redbooth includes Quickbase , Smartsheet, ClickUp, Zoho Projects, Wrike, TeamGantt, Asana, Teamwork, ProjectManager.com, Microsoft Project, ProWorkflow, nTask, Taskworld, Trackboard, Quick Base and Height.