Paytronix Systems, which specializes in loyalty, rewards, gift, mobile applications, and guest engagement analytics software, has received a $65 million growth equity investment from Great Hill Partners, a Boston-based private equity firm focused on investments in high-growth mid-market companies, according to a press release.

"Restaurant and convenience store operators are seeking more efficient and scalable ways to engage with their customers in real-time to increase foot traffic and sales," Nick Cayer, partner at Great Hill Partners, said in the release. "Paytronix is the clear market leader, providing its robust platform to brands such as Panera Bread, California Pizza Kitchen, Thorntons and Bloomin' Brands."

Paytronix serves more than 330 merchants and 16,000 store locations generating $18 billion in guest spend, according to the press release.