SAN FRANCISCO — The retail landscape is littered with the casualties of changing consumer behavior. Shoppers are bargain hunting online, department stores are struggling, and once-mainstay brands are closing out permanently.

Then there is Stitch Fix, a mail-order clothing service that offers customers little choice in what garments they receive, and shies away from discounts for brand name dresses, pants and accessories.

Despite a business model that seems to defy conventional wisdom, Stitch Fix continues to grow.

For the fiscal year that ended last July, the company recorded sales of $730 million. It has been profitable since 2014 and has raised just $42 million from outside investors, a relatively modest sum for a high-flying Silicon Valley start-up.

And while Stitch Fix executives say they have no specific plans to go public, the company is well positioned to file for an initial public offering as soon as this year.