Klaviyo is an email and marketing automation software made to support business expansion. It makes it simple for retailers to set up email marketing without the need for expensive systems and lots of employees, from customised newsletters to automated emails like abandoned carts, purchase follow-ups, and personalised thank yous. It designs the technology to house data at scale, interacts natively with customer data sources, develops cross-channel experiences, and evaluates the outcomes. The business is situated in Boston, Massachusetts, and was established in 2012.