Yes, both Xero and Intervals offer a Free Trial.
Xero is designed for Freelancers, Medium Business and Small Business.
Intervals is designed for Individuals, Large Enterprises, Medium Business and Small Business.
The starting price of Intervals begins at $29/Month, while pricing details for Xero are unavailable.
Some top alternatives to Xero includes Quickbooks, Sage Accounting (Sage One), Zoho Books, Zoho Daybook, QuickFile, Sage Business Cloud Accounting, MYOB, QuickBooks Desktop Pro, QuickBooks Online Advanced and Sage 50cloud Accounting.
Some top alternatives to Intervals includes Smartsheet, Miro, Process Street, Wrike, Notion, TimeTracker App, Tick, TimeTrack, Time Track Bill, TimeControl, Track My Work, Teamwork, ProjectManager.com, ProWorkflow, Quick Base, ClickUp and TaskBlast.