The return of facial hair, whether in the form of artful scruff or hipster beard, has been a major trend in men’s grooming over the last decade. But it can’t last forever; at least, that is what the founders of several up-and-coming razor companies hope.

“Guys are embracing the fact that the bathroom is the original man cave,” said Michael Dubin, 35, a founder of Dollar Shave Club in Venice, Calif. “It’s where you see yourself naked; you evaluate your progress; you prepare yourself for battle every day.”

In 2011, when Mr. Dubin and Marc Levine founded their company, a direct-to-consumer e-commerce site with razors delivered monthly at a low cost, the industry was dominated by the likes of Gillette and Schick, “the big boys playing their big-boy game,” Mr. Dubin said.

But “guys don’t like to get ripped off,” he said, referring to drugstore prices, which he said were excessively inflated.