Maura McDermott:

A real estate technology company that aims to lower the cost of home-selling by using robots and “big data” instead of commission-based real estate agents has opened a Long Island office — its first outside of California.

REX Real Estate Exchange, which charges a selling commission of 2 percent instead of the usual 5 percent to 6 percent, launched its Long Island operation last week, when it started operating out of a co-working space at RXR Plaza in Uniondale. The Los Angeles-based company expects to start listing New York-area homes on its website, rexchange.com, later this week.

Traditional real estate fees “are just crazy high compared with every other industry in the United States,” said Jack Ryan, Rex’s chief executive and a former partner at Goldman Sachs. Decades ago, investment brokerages charged 12 cents a share for stock trades, but now they charge less than a penny, he said. By lowering real estate fees, he said, his company is “doing the same thing with residential real estate.”

Buyers typically start their search online, he said, “but at the end of the day, most people are still relying on the value a real estate agent provides.”

The company does not list homes on services such as the MLS. Instead, Ryan said, it uses ads and listings on websites such as Zillow.

“You used to really need a traditional agent to buy a home or sell a home,” Starck said. But now, he said, “there’s an unprecedented amount of information available . . . I really do think this is going to be the company to change the industry.”