Yes, both SherpaDesk and Invoice Ninja offer a Free Trial.
SherpaDesk is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Invoice Ninja is designed for Freelancers, Medium Business and Small Business.
The starting price of SherpaDesk begins at $9per Tech, while pricing details for Invoice Ninja 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 Invoice Ninja includes Invoiced, Zoho Invoice, InvoiceBerry, Invoicely, Crater, Moon Invoice, Simple Invoices and Billin.