Yes, both SherpaDesk and Zervant offer a Free Trial.
SherpaDesk is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Zervant is designed for Medium Business and Small Business.
The starting price of SherpaDesk begins at $9per Tech, while pricing details for Zervant are unavailable.
Some top alternatives to SherpaDesk includes Zendesk Support, Zoho Desk, Tidio Helpdesk, Time Track Bill, Billable, Apptivo, Freshservice, Vertask, Freshdesk, Teamwork Desk, LiveAgent, HelpDesk, SysAid, Jitbit Helpdesk, mHelpDesk and AtTrack.
Some top alternatives to Zervant includes Invoice Ninja, Invoiced, Zoho Invoice, InvoiceBerry, Invoicely, Moon Invoice, Invoicebus, Simple Invoices, Billin and Invoice Simple.