The term dark store, dark supermarket or dotcom centre refers to a retail outlet or distribution centre that caters exclusively for online shopping. A dark store is generally a large warehouse that can either be used to facilitate a "click-and-collect" service, where a customer collects an item they have ordered online, or as an order fulfilment platform for online sales. The format was initiated in the United Kingdom, and its popularity has also spread to France followed by the rest of the European Union.
Not open to the public, the interior of a dark supermarket may appear like a conventional supermarket, set out with aisles of shelves containing groceries and other retail items. However, without having to deal with retail customers, the stores are not located in the high street or shopping centres, but mostly in areas that are preferred for good road connections. The buildings themselves are often utilitarian and nondescript from the outside. Inside, the stores dispense with assistants who provide product advice, check-out counters and point of sale displays.
After orders received via the Internet are processed, the orders are sent to the shop floor. These electronically generated orders, processed and routed according to the store layout for optimal picking, are picked by store employees, known as "personal shoppers" (colloquially "pickers"), who work around the clock fulfilling the orders displayed on a tablet computer attached to their shopping trolley. More than one order can often be collected simultaneously.
Tesco opened a "fourth generation dotcom store" in Erith in October 2013, with a much larger product range – 30,000 lines – and higher degree of mechanisation that brings items to pickers rather than requiring them to collect individual products manually. Fulfilled orders are then delivered to the customer by a fleet of vans. A certain time of day, usually in the early hours of the morning, is set aside for stock replenishment. In the United States, Toys-R-Us adopted a version of the dark store model but it uses existing stores as warehouses. Traditional and online operations converge as the company uses their parked inventory to deliver online orders.
While most popular dark stores serve groceries, some of them are clothing shops, helping brands to cut the costs. Dark stores are less costly to operate not only because of they are located in cheaper rental areas but also because of the reduced picking cost. A dark store-picked grocery costs a company around £12, which is significantly lower than the £18-£20 cost per grocery order picked at a traditional store.
The first UK supermarket to trial the concept of a specific store for online goods was Sainsbury's, which operated a distribution centre at Park Royal in London during the early 2000s, but the retailer closed the outlet because of a low order quantity. It was over a decade afterwards, in October 2013 that they announced plans for another, at Bromley-by-Bow, in East London.
The term dark store first appeared in the UK in 2009 when Tesco opened their first such supermarkets in Croydon, Surrey, and Aylesford, Kent. At the time, Tesco were receiving around 475,000 orders per week which were being fulfilled from its existing retail supermarkets. Supermarkets began opening dark stores to assist with distribution in geographical areas where there was a high demand for online delivery. Retail companies with dark stores usually operate fleets of light trucks to deliver orders made online, particularly to inner urban areas, avoiding disruptions to offline store operations.
The dark store format was seen by Tesco as a more efficient way of dealing with the expansion in online sales. The retailer planned to open one dark store per year "for the foreseeable future". By 2013, Tesco had opened six dotcom centres in and around London, and was responsible for 47.5% of online deliveries made in the UK. The latest of these was a store that opened in Erith in October 2013, and which the industry publication Retail Gazette described as a "fourth generation dotcom store" because of the greater emphasis on a mechanised system that brought items to pickers rather than requiring them to collect individual products manually, while chilled goods are conveyed directly from refrigerator to delivery van. The Erith store holds a range of 30,000 products, and has a capacity to process 4,000 online orders a day.
In November 2012, Zoe Wood of The Guardian reported that a number of dark stores had been opened by major supermarket chains in the UK, including Tesco and Waitrose, with more planned. Waitrose opened their first online distribution centre at the site of a former John Lewis warehouse in London in April 2011, and in September 2013 announced plans for a second, purpose-built centre at Coulsdon that would open in 2014. The company had previously used the Ocado distribution service to dispatch its goods to customers, but wished to begin rolling out its own delivery service.
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- In the via delle Botteghe Oscure in Rome, the street of "dark shops", during the Middle Ages the street's "dark shops" came to be installed under the dim arches of the Circus Flaminius; the literary review Botteghe Oscure took its name from the street.
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