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Virtual customer-assistance company Interactions—the technology behind automated customer-service solutions for companies such as Hyatt, LifeLock, and Asurion—pulled in $56 million today. This is the company’s largest round since launching in 2004. It brings the company’s total funding to $167 million.

The funding comes from Comcast Ventures, NewSpring Capital, and Revolution Growth. Previous investors include Sigma Partners and Softbank Capital. Interactions CEO Mike Iacobucci said he plans to use the funding to meet the “widespread, growing demand” for its speech and natural language offerings and to boost sales and marketing efforts.

The Massachusetts-based company leverages AI and voice-recognition technology to help big brands offer a more friendly, automated customer experience. At FinovateSpring 2014, Interactions launched conversational solutions for banks that enable customers to access account information, change account details, and ask complex questions about their account in real time.

Interactions processes just shy of one billion customer transactions on an annual basis for large brands in seven industries. From 2014 to 2015, the company doubled its annual revenue; it expects to grow sales by 50% in 2016.