Yes, both Xero and Kayako offer a Free Trial.
Xero is designed for Freelancers, Medium Business and Small Business.
Kayako is designed for Large Enterprises, Medium Business and Small Business.
Pricing details for both Xero and Kayako are unavailable at this time. Contact the respective providers for more information.
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 Kayako includes Zoho Desk, Zendesk Support, ManageEngine ServiceDesk Plus, Freshservice, Freshdesk, Deskero, Teamwork Desk, LiveAgent, HelpDesk, SysAid, Jitbit Helpdesk, CRMdesk, Sitehelpdesk, LabiDesk, HESK and BoldDesk.