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Yes, both Xero and Trello offer a Free Trial.
Xero is designed for Freelancers, 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 Xero are unavailable.
Some top alternatives to Xero includes Sage Accounting (Sage One), Patriot Accounting, Quickbooks, Zoho Books, Zoho Daybook, QuickFile, Sage Business Cloud Accounting, MYOB, QuickBooks Desktop Pro, QuickBooks Online Advanced and Sage 50cloud Accounting.
Some top alternatives to Trello includes Quickbase , Smartsheet, ClickUp, Freshbooks, Jira, Basecamp, Wrike, Zoho Projects, monday.com, Asana, Teamwork, ProjectManager.com, Microsoft Project, Worksuite, Trackboard, Quick Base, Todoist, Resource Guru and Height.