wsj.com              Amazon Opens Cashierless Supermarket in Latest Push to Sell Food                     
                   Amazon.com Inc.          is rolling out  its checkout-free “Go” technology in a large grocery store and plans to license the cashierless system to other retailers.
                              Amazon          Go Grocery will open in Seattle on Tuesday. It uses an array of  cameras, shelf sensors and software to allow shoppers to pick up items  as varied as organic produce and wine and walk out without stopping to  pay or scan merchandise. Accounts are automatically charged through a  smartphone app once shoppers leave the store.
   The company has operated a string of  Go-branded convenience stores since  2018 but improvements in camera technology and its use of algorithms  have allowed it to build a 10,400-square-foot market, said            Dilip Kumar,             vice president of Amazon Go. That is about five times bigger than  the largest existing Go store and Mr. Kumar said the technology could  be deployed on an even larger scale.
   “We’ve learned a lot,” he said. “There’s no real upper bound. It could be five times as big. It could be 10 times as big.”
                                                               
                          The new store uses an array of cameras, shelf sensors and  software to allow shoppers to pick up items and walk out without  stopping to pay.                                                                                                                                                                                              Amazon hopes the grocery store will serve as a showcase for  its technology as it seeks to sell its system to other businesses. The  company has recently been in talks with potential partners and is  targeting retail options including convenience stores and shops in  airports and sports arenas, according to people familiar with the  matter. Amazon has discussed multiple revenue models, including a fixed  licensing fee or a revenue-sharing agreement, one of the people said.
   Mr. Kumar declined to comment on how many Go Grocery stores are planned or plans for licensing.
   The  Go licensing plans are Amazon’s latest effort to partner with some of  the same traditional retailers it has long disrupted, and who regard the  e-commerce giant as a fierce competitor and threat. In recent years,  Amazon has also signed deals with                 Rite Aid Corp.          and                 Kohl’s Corp.          to handle delivery pickups or returns that help drive foot traffic to their stores.
   Amazon  has considered offering to install and set up equipment to enable its  cashierless technology and market it as a service, according to a person  familiar with its plans.
                           Retailers could use the technology for a variety of purposes,  including to track inventory or customer habits, that may stop short of  having a full-scale cashierless store, said            Joanne Joliet,             a technology analyst with                 Gartner Inc.          But Amazon’s size and clout could scare off some potential  partners, and concerns over how their data is safeguarded may make some  hesitant, she said.
   Amazon operates 25 Go stores in Seattle, New  York, Chicago and San Francisco, which range in size from about 450  square feet to 2,300 square feet. The Go Grocery in Seattle is about the  size of typical urban grocery stores, which average between 5,000 to  15,000 square feet, according to research firm Kantar. 
   Amazon’s cashierless stores have  inspired other  retailers and tech startups to explore similar technology, including  models that feature smart shopping carts. Some startups, such as  Berkeley, Calif.-based Grabango Co., have signed deals with regional  grocery chains, while others are working in sports arenas. In Europe,  retail giant                 Tesco          PLC has tested  similar technology.
   However,  while cashierless stores have proved popular with customers, some  retail analysts have questioned whether the cost of deploying the  technology for a typically low-margin industry is worth it. Some  cashierless tech suppliers say costs to set up and maintain the systems  can easily reach into the millions. 
   Equipment prices continue to  fall and Amazon’s software has grown more efficient, allowing the  company to control costs, Mr. Kumar said. The Go team handled a “vast  increase in complexity in the way shoppers interact with items” without a  significant increase in costs, he added.
   In Amazon Go stores,  when customers scan a phone app and pass through gates, the system  recognizes them as they pick items and leave. They are sent a receipt  shortly after through the app.
                                                               
                          The Go Grocery store stocks roughly 5,000 items.                                                                                                                                                                                              At the new Go Grocery store, customers can take unpackaged  produce items such as pears or apples, which are sold per-item rather  than per-pound, and walk out. The system’s cameras are particularly  important for fresh produce that requires regular misting, such as  lettuce, which makes it more difficult to use weight sensors, according  to Amazon.
                                                                                                	  SHARE YOUR THOUGHTS  What benefits or drawbacks do you see to cashierless supermarkets? Join the conversation below. 
                                                                                                                                             The Go Grocery store stocks roughly 5,000 items, Mr. Kumar  said, far more than its smaller stores. That includes products from the  365 label of Whole Foods, which Amazon bought in 2017 for $13.7 billion,  as well as local suppliers. Items also include pet supplies, packaged  meats, cheeses, toilet paper and many other common grocery products.
   “We  tried to go department by department to be able to say, ’What do people  really look for in a neighborhood grocery store?’” Mr. Kumar said. “We  felt like the just-walk-out shopping experience in a residential  neighborhood, in a residential grocery store, would resonate very well.”
   Go  Grocery is part of a broader expansion of Amazon’s presence in grocery.  Aside from more than 500 Whole Foods stores, the company recently  confirmed plans to start a separate grocery chain with human cashiers,  with the first store planned for the Los Angeles area this year.
   Grocery  delivery has also been a growing focus. Amazon has used the Whole Foods  locations to deliver food to customers, and the company also offers  delivery in some areas through its Amazon Fresh unit.
   As Amazon has gained a foothold in the industry,                 Walmart Inc.          and                 Target Corp.          have also ramped up grocery delivery efforts. Walmart this month  said online grocery sales helped boost its U.S. e-commerce revenue by  35% in the fourth quarter. 
   Mr. Kumar said Go Grocery wouldn’t  initially offer delivery and that the company had no plans to put  cashierless technology in Whole Foods stores. While Go Grocery is aimed  at quick and convenient shopping in urban areas, suburban locations  could be possible one day, he added.
   —Dana Mattioli contributed to this article.
                                                               
                          ‘We tried to go department by department to be able to  say, ’What do people really look for in a neighborhood grocery store?’’  said Dilip Kumar, vice president of Amazon Go.                                                                                                                                                                                               Write to Sebastian Herrera at  Sebastian.Herrera@wsj.com and Aaron Tilley at  aaron.tilley@wsj.com
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