Bill.com - Bill.com provides ACH payments processing, automates your accounts payable and accounts receivable processes.
ChargeOver - ChargeOver automates recurring billing, subscription billing, & payment acceptance. A SaaS that integrates with Xero, Quickbooks, & has an API. Free trial.
Tipalti - Tipalti is a supplier payments automation solution to streamline all phases of the AP and payment management workflow.
fusebill - Fusebill is the leading recurring billing and subscription management software for businesses. Try Fusebill for subscription billing made easy!
Coupa - Coupa is a cloud-based suite of financial applications providing spend management solutions to companies.
MinuteDock - Web-based time tracking software designed to integrate with the Xero accounting package.