Instacart caught using AI pricing to charge different prices for the same groceries across stores

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A joint investigation by Consumer Reports and Groundwork Collaborative reveals Instacart has been running extensive price-testing experiments using AI-powered algorithms. The study found that 74% of identical grocery items showed varying prices for different customers shopping at the same stores, with price differences reaching up to 23% in some cases.

Instacart Faces Scrutiny Over AI Pricing Experiments

Instacart has been charging customers different prices for the same items despite products being picked from identical store locations, according to a comprehensive investigation published by Consumer Reports, Groundwork Collaborative, and More Perfect Union

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. The months-long study involved 437 volunteers across four cities who simultaneously added specific items from designated stores to their carts, revealing that nearly 74% of products displayed varying prices

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. Every participant encountered algorithmically determined price differences during the controlled experiments

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Source: ABC News

Source: ABC News

The research uncovered significant variations in pricing across major retail partners including Albertsons, Costco, Kroger, Safeway, Sprouts Farmers Market, and Target

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. In one striking example, shoppers adding a dozen Lucerne eggs from a Safeway store in Washington, DC, saw five different prices: $3.99, $4.28, $4.59, $4.69, and $4.79

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. At a Target store in Ohio, identical grocery baskets ranged from $84.43 to $90.47

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. Seattle-area tests revealed that the same Safeway cart cost some shoppers $123.93 while others paid $114.34 or $119.85

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The Technology Behind Dynamic Pricing Tests

The price-testing experiments rely on Eversight, an AI-powered pricing tool that Instacart acquired in 2022

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. This acquisition marked Instacart's strategic shift from logistics provider to technology platform, enabling the company to market pricing optimization tools using machine learning

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. The system operates similarly to dynamic pricing models used by airlines and hotels, analyzing large datasets from its online marketplace and adjusting prices within select product categories and user groups

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Investor materials reveal that the technology can boost sales by one to three percent and increase profit margins by up to five percent for grocery partners

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. The company's machine-learning tools include AI-driven smart rounding, which adjusts prices in fractional increments to test price sensitivity

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. According to investor documents, smart rounding helps retailers set prices more precisely based on consumer responsiveness, generating millions in additional annual sales for large grocery partners

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Financial Impact on Households

On items selected for the survey, the average price difference between the lowest and highest price was 13%, with the largest differential for a single item reaching 23%

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. Consumer Reports found price differences ranging from seven cents to $2.56 for single items in identical carts

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. Applying a variation of 7% to the $363 that Instacart says an American household of four spends per month on groceries, the cost swing would amount to roughly $1,200 per year

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. With nearly half of Americans reporting that grocery prices are a major source of financial stress, these random price swings make budgeting increasingly difficult

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Source: TechSpot

Source: TechSpot

Company Response and Retail Partner Denials

Instacart confirmed conducting dynamic pricing tests using artificial intelligence software with roughly 10 retail partners, though it declined to identify them all

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. The company stated that products are part of price-testing experiments conducted with retail partners, explaining that "just as retailers have long tested prices in their physical stores to better understand consumer preferences, a subset of only 10 retail partners -- ones that already apply markups -- do the same online via Instacart"

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. These limited, short-term, and randomized tests allegedly help retail partners learn what matters most to consumers and how to keep essential items affordable

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However, Target denied any participation, stating it "is not affiliated with Instacart and is not responsible for prices on the Instacart platform"

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. Companies whose stores were involved told researchers they had no idea the tests were being run

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. Following the report, Instacart discontinued tests at Target and Costco

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Surveillance Pricing Concerns and Data Usage

Instacart insists the experiments are "not dynamic pricing [since] prices never change in real-time, including in response to supply and demand" and claims they "never use personal, demographic, or user-level behavioral data"

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. The company says users are randomly assigned to price-testing cohorts by product category and region, not by identity

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. However, patent filings by Instacart and Eversight from 2017 to 2025 mention the potential use of behavioral and demographic data such as age, household size, income, and purchase history to refine offers and group customers into "subpopulations"

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Source: HuffPost

Source: HuffPost

Consumer advocates warn that these features represent early stages of surveillance pricing, a model where companies use highly personalized data to charge different prices for the same groceries

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. In 2024, the Federal Trade Commission issued a warning against eight companies accused of using personal data to set individualized prices on the same goods and services

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. Former FTC Chair Lina M. Khan stated that "firms that harvest Americans' personal data can put people's privacy at risk. Now firms could be exploiting this vast trove of personal information to charge people higher prices"

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Regulatory Response and Industry Implications

The investigation also uncovered multiple instances of "fictitious" or "false reference" pricing, where Instacart presented different original prices for discounted items, altering the perceived size of the discount

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. Seattle volunteers shopping at Safeway through Instacart saw Premium brand saltine crackers with original prices ranging from $5.93 to $6.69 before the app applied the identical sale price of $3.99

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. Laura Smith, legal director at the nonprofit Truth in Advertising, noted that dynamic algorithms are accelerating false discounting, creating a sense of urgency and unfairly affecting competition

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Several states have started introducing bills or enacting laws to address algorithmic pricing

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. New York state implemented the Algorithmic Pricing Disclosure Act in November, which requires companies to display a disclaimer reading "THIS PRICE WAS SET BY AN ALGORITHM USING YOUR PERSONAL DATA"

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. The next phase in algorithmic pricing may already be unfolding through efforts like Instacart's Carrot Tags program for retailers, which would enable "instant and accurate pricing changes with dynamic price and promotion optimization strategies at the shelf"

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. Companies like Walmart, Kroger, and Whole Foods have moved to implement dynamic pricing for in-store shoppers as well, with Kroger experimenting with these systems since 2018 and rolling them out to hundreds of brick and mortar locations

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