Popular alternatives include Zervant, BillingPlatform, Billbooks, Octane Billing and Zenskar.
Key factors include Quotes (Estimates), Project Billing, Online Invoicing, Invoice History, Customizable Invoices and pricing.
Tools like Invoice2go, AND.CO, BillQuick, Invoicera and OneBill are best for small businesses for Billing and Invoicing Software.