Sales tax and compliance automation service provider Avalara has purchased cloud-based tax exemption certificate management product maker Tax Technology Services(TTS) for an undisclosed sum.

The move effectively expands Avalara’s certificate management business and adds all 25 former TTS employees who will work from their existing Raleigh, North Carolina base.

Founded in 2002, TTS is the developer of CertCapture, which acquires, maintains, and retains exemption and resale certificates, use tax certificates, W-9s, excise tax, and other time sensitive documents. With databases that scale into the millions, CertCapture integrates with ERP, tax decision software, or custom-developed business systems to provide customer exemption status in real time.

 “Our aim is to be the clear leader in every market we enter,” said Avalara chief executive Scott McFarlane. “We already had a preeminent position in certificate management, taking on more new customers every year than the rest of the market combined. The addition of TTS, with its excellent technology, strong customer base, and leading experts in the industry extends our lead and solidifies our position.”

In January, Avalara also purchased UPC code taxability database UPC Matrix Master, which added in a multi-state, product database that maintains taxability information for more than 10 million products in thousands of tax jurisdictions across the U.S.