"In our experience, businesses which introduce our card payment links into their accounting process get paid faster," Kumar said.
Xero managing director Victoria Crone, said the introduction of Swipe HQ into the Xero ecosystem was a welcome addition.
"Cashflow is hugely important to our small business customers."
"By combining Swipe HQ with Xero, customers can bring invoice presentation and payment online and get paid faster," Crone said.
In 2012, Optimizer launched Swipe HQ Checkout, a virtual credit-card merchant facility that lets businesses accept credit card transactions without the need for a terminal and at a lower cost than its competitors.