Invoice Quickly is described as 'Online Invoicing platform for small businesses,freelancers and agency owners.Invoice Quickly helps businesses save their time by creating invoices and estimates quickly and sending them to their customers' and is a Invoicing software in the business & commerce category. There are more than 25 alternatives to Invoice Quickly, not only websites but also apps for a variety of platforms, including iPhone, Android, Windows and iPad apps. The best Invoice Quickly alternative is Invoice Ninja, which is both free and Open Source. Other great sites and apps similar to Invoice Quickly are InvoicePlane, FreshBooks, Invoicera and Harvest.