Yes, both CoManage and Envoice offer a Free Trial.
CoManage is designed for and Small Business.
Envoice is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Envoice begins at $12/Month when Billed Yearly, while pricing details for CoManage are unavailable.
Some top alternatives to CoManage includes Invoice Ninja, Invoiced, InvoiceBerry, Invoice2go, Invoicebus, Simple Invoices, Billin, Inwise, Envoice and Invoice Simple.
Some top alternatives to Envoice includes Invoiced, InvoiceBerry, Square Invoices, PayorCRM, Simple Invoices, Billin, InvoiceApp, GoGSTBill, PayNet and Billogram.