The acquisition of five-year-old Kustomer comes as Facebook continues to weave e-commerce into offerings, particularly its WhatsApp and Messenger messaging services

Facebook on Monday announced it is buying a startup specializing in helping businesses interact with customers online.

The acquisition of five-year-old Kustomer comes as the leading social network continues to weave into offerings, particularly its WhatsApp and Messenger messaging services.

More than 175 million people contact businesses via WhatsApp daily, and the number is growing, according to WhatsApp chief operating officer Matt Idema and Facebook vice president of products Dan Levy.

“With our complementary capabilities, we will be able to help more people benefit from that is faster, richer and available whenever and however they need it—via phone, email, text, web chat or messaging,” Kustomer chief executive Brad Birnbaum said of uniting with Facebook.

“In particular, we look forward to enhancing the messaging experience which