Yes, both Xero and Kustomer offer a Free Trial.
Xero is designed for Freelancers, Medium Business and Small Business.
Kustomer is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Kustomer begins at $29/User/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 Kustomer includes Zoho Desk, Zendesk Support, ManageEngine ServiceDesk Plus, Zendesk Sell, Freshservice, Freshdesk, HelpDesk, SysAid, Jitbit Helpdesk, Desky, Salesforce Service Cloud, CRMdesk, Gorgias, Trakdesk, AzureDesk and BoldDesk.