Bahn
Yes, both OpenProject and Trello offer a Free Trial.
OpenProject is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Trello is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
The starting price of Trello begins at $5/User/Month when Billed Yearly, while pricing details for OpenProject are unavailable.
Some top alternatives to OpenProject includes monday.com, Quickbase , Smartsheet, ClickUp, Freshbooks, Jira, Wrike, Zoho Projects, Taiga, Asana, Teamwork, ProjectManager.com, Microsoft Project, Leantime, Worksuite, Quick Base, Resource Guru, Redmine X, Height and RedmineUP.
Some top alternatives to Trello includes monday.com, Quickbase , Smartsheet, ClickUp, Freshbooks, Jira, Basecamp, Wrike, Zoho Projects, Asana, Teamwork, ProjectManager.com, Microsoft Project, Worksuite, Trackboard, Quick Base, Todoist, Resource Guru and Height.