But if you're a restaurant, this shift to the web may not sit so well with you.

"The more business we bring Seamless, the more commission they charge us," says Pedro Munoz, who owns Luz, a Latin-American restaurant in Brooklyn.

Two years ago, Munoz signed up with Seamless. The commission seemed high — they'd take $1 out of every $10 order — but he was willing to give it a try. And at first, Munoz really liked the results.

"Almost [instantly] the business started picking up," he says. "We had to hire another delivery guy."

But then little things started bugging Munoz. There was a $150 a month "marketing fee" that he couldn't understand, and Seamless only paid him every 30 days, which left him chronically short of cash.

When his monthly orders increased to over $10,000, Seamless raised its take from 10 percent to 14 percent. Munoz couldn't believe this. When he orders more from his vegetable supplier, the price goes down. With Seamless, the opposite was happening.

"I asked them, 'I'm bringing in three times as much money to Seamless as before. Can we negotiate the fees?'" he says. "They said they could drop me any day, and they don't negotiate fees."

Matt Maloney, CEO of the newly merged Grubhub-Seamless, says the relationship isn't adversarial, it's supportive. He says that they don't make money unless the restaurant makes money, but Seamless provides a valuable service that restaurants can't easily match.

"If a restaurant's not on Grubhub-Seamless, then their best option is to distribute paper menus around their neighborhood," Maloney says.

A lot of restaurant owners agree that is ineffective. Tom DeSimone owns the tiny RBBTS Café in Manhattan. He says the food delivery website connects his restaurant to law firms and banks. Big companies that use vouchers for websites like Seamless to reward their employees.

"It got us to the 100th floor of some building that you would never slip your menu underneath, and I just feel it opened us up to more of an online community," DeSimone says.

The commission might be high, he says, but that even if Seamless increased its cut, he would still stick with them.

Copyright 2013 WNYC Radio.

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Food Delivery Hits the Web, But Restaurants Pay the Price