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