Better Buy: Costco vs. Amazon

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More than anyone else, Costco Wholesale (NASDAQ: COST) and Amazon (NASDAQ: AMZN) have dominated the current retail era. Costco has regularly put up comparable sales growth in the mid- to high-single-digit range and is the second-largest American retailer by revenue, while Amazon's fast-growing e-commerce business has threatened nearly every corner of traditional retail.

The two companies have managed to grow and take market share when so many other retailers are struggling, largely because of the strength of their membership program and high customer satisfaction. For Costco, that means its warehouse club model, as shoppers must pay an annual membership fee of $60 for the privilege of getting access to its bargain-priced bulk goods, among other benefits. Amazon, meanwhile, has signed up more than 100 million subscribers for its Prime loyalty program, which offers a slew of benefits including free two-day shipping, free video streaming, and discounts at Whole Foods. As it's grown, Prime has become a source of much of Amazon's competitive advantage.

Two hands corral a scale weighing two sets of coins.
Two hands corral a scale weighing two sets of coins.

Image source: Getty Images.

For both companies, the membership programs lock customers in and incentivize purchasing. Both services have renewal rates of 90% or higher in North America, showing the high levels of customer satisfaction.

Amazon, of course, is much more than a retailer, as the company has built a leading cloud-computing business among its other ventures; its success as an innovator may explain why the stock has soared over the last five years, easily beating Costco during that time.

COST Chart
COST Chart

COST data by YCharts

Still, with Amazon pushing a $1 trillion market value, investors are unlikely to see a repeat of that performance over the next five years. Which is the better buy today?

A brick-and-mortar success story

At a time when almost every retailer is scrambling to keep up with changes in the industry and fend off Amazon, Costco continues to put up steady growth. Yes, the company has finally begun to embrace e-commerce, offering free two-day shipping for nonperishables with a $75 minimum and same-day shipping on perishables through Instacart, but the company's success comes from the enduring value of its core business model.

Costco offers bargain prices, selling goods nearly at cost, to members willing to pony up the $60 membership fee each year. The retailer is one of the few big-box chains still steadily adding stores, as it opened 13 new warehouses in the U.S. and 21 globally last year. The company's current base continues to grow sales; comparable sales adjusted for fuel prices and currency rose 7% last year and by the same pace for the first half of its current fiscal year. E-commerce sales were also up 26% over the last two quarters.