U.S. – Wayfair, the largest specialized online furniture retailer in the U.S., redoubled its efforts in search and TV advertising last year in order to dominate the Google results page – but Wayfair’s biggest competitor is not brick-and-mortar chains, it’s Amazon.

According to a report released by One Click Retail, Amazon already holds the largest market share in this space, having tripled its sales in the category since 2015. In 2017, the e-commerce giant grew its U.S. furniture business 51% from the year before to USD 4 billion.

Last year, Amazon invested in Furniture with a brand new comprehensive marketing site – Amazon Home – the building of four new warehouses focused on delivering large furniture and appliances, and the release of two private furniture brands, Rivet and Stone & Beam. As a result, the YoY growth rate continued to climb, reaching 51%.

For some perspective, that USD 4 billion figure would likely make Amazon No. 2 in the nation. Ashley HomeStore was the No. 1 retailer on Furniture Today’s Top 25 ranking last year with 2016 furniture estimated at USD 3.7 billion. The 2017 Furniture Today sales ranking won’t be released until August.

It’s clear that the furniture market is a valuable investment for Amazon, and it’s equally true that Amazon is a valuable investment for furniture brands. The retailer’s large and loyal base of Prime members are not likely to shop at another online retailer if they don’t have to, and Amazon’s investments in logistics, private brands and new technologies are growing this base. The company already holds the largest market share of online furniture sales and is likely to capture the bulk of future growth in the long term. Furniture brands looking to compete in eCommerce, the industry’s fastest-growing space, need to begin at Amazon.