Tomorrow, Xero announces the integration of ADP to bring their RUN powered payroll platform under its fold. Xero is an efficient SaaS online accounting software solution with $35 million in the bank, and counts Peter Theil among its repeat investors. Not to mention, they have 78,000 paying customers and 240,000 users located around the world in over 100 countries.

In 2006, Xero launched in the traditionally plucky New Zealand manner. Serial entrepreneur, Rod Drury was having trouble tracking his several companies’ performance with his accountant, Hamish Edwards. So Drury decided to set out on a quest to rework and simplify online accounting. Edwards joined Drury on his mission against the likes of grayscale Quickbooks and other overly complex accounting platforms. They picked up other friends (read employees) along the way, including first and foremost, a designer with the vision to create beautiful accounting software – a strange vision, but well placed. Their second employee was a designer, who still holds a post at the company. Thus Xero was formed, aimed at becoming the small business accounting platform on the web, for the world.

Hop forward to the present day and Xero has 190 employees around the world and is listed as one of the top 50 companies on the New Zealand Stock Exchange. Their primary accounting target is the “inherent problem with data being out of sync,” says US President of Operations, Jamie Sutherland, with Xero “info flows directly into accounting software.” In the US alone, Xero syncs up with over 5000 banks.

Tomorrow they’re announcing an integration with ADP, meaning customers will now be able to integrate payroll into their Xeroing. They’ve been working on integrating the services for six to eight months and as Jamie Sutherland says, “it’s a real coup”.

The program runs on an SaaS model and offers up solutions for small, medium, and large scale businesses, but its their open API that really pushes them forward. The open API is one of the core tenants of Xero says Jamie Sutherland, adding that it “allows any other web service to integrate seamlessly.” Salesforce and Sugar CRM are among the API’s users as well as a host of other New Zealand and Australia based companies. The integration with ADP will pull their software under Xero’s “add-ons” category.