The retail industry has undergone seismic changes in the past few years. Customers across the country kept spending throughout the COVID-19 pandemic — but their habits evolved, highlighted by a jump in online sales.

A Fairfield-based startup, Knocking, has noticed — and capitalized — on these consumer trends. In the past few years, the company has significantly expanded its reach by leveraging a business model that fuses e-commerce and content creation to boost revenues for some of the country’s largest media companies and numerous brands. It has grown so precipitously that it ranked highest among Connecticut-based firms and No. 161 overall, with 3,232 percent revenue growth between 2019 and 2022, on this year’s Inc. 5000 list of the fastest-growing privately held companies in the U.S.