DoorDash-Instacart Merger Turns Up the Heat on Grocery E-Commerce Pricing

Instacart stockholders can elect cash, DoorDash stock, or a mix, and stockholders holding about 19% of Instacart's outstanding shares have already agreed to vote in favor [5]. Instacart's board approved the agreement unanimously, and the close is pending antitrust review [3].

DoorDash plans to keep Instacart's brand, technology and app. The two companies will continue operating separately until the deal closes [3]. That structure, the companies argue, lets them combine back-end scale without disrupting the storefronts grocers and shoppers already use.

Instacart's chief commercial officer, Ryan Hamburger, argues the combination lets both companies amortize fixed technology and delivery costs across a larger order volume, lowering the "cost to serve" on every order [1]. DoorDash CEO Tony Xu made a similar case on the company's November 4 earnings call, saying the deal would enable faster delivery and more affordable prices that in turn generate more sales for grocers [1].

Not everyone is convinced the savings will reach consumers. Carlos Castelán, a consultant at Catalant, put the tension plainly:

GlobalData managing director Neil Saunders takes a more optimistic view, arguing competition from Walmart and Amazon will keep DoorDash from raising fees beyond general inflation, since it "cannot afford to deteriorate service or do anything to alienate shoppers" [1].

The scrutiny isn't new for Instacart. At the end of 2025, an investigation by Consumer Reports and Groundwork Collaborative found that grocery prices on Instacart's platform could differ by as much as 23% between customers under a pilot the company has since ended [1]. Instacart has separately spent more than a year advocating for price parity, matching online and in-store prices, arguing it protects long-term shopper loyalty [1].

Advocacy groups have used that history to argue against the deal. The United Food and Commercial Workers union called the combination "a nightmare for shoppers and workers alike," warning that "the squeeze will be on for families looking to put food on the table" [1].

Antitrust lawyer Barry Barnett of Susman Godfrey wrote that the deal "portends downward pressure on margins for food sellers and upward pressure on costs for buyers" by narrowing choice in food delivery [1].

Hamburger made the comparison directly: shoppers who abandon a grocer's own site aren't switching to a rival supermarket's e-commerce platform. They're going to Amazon or Walmart on price and convenience [1]. That reframes the merger's real competitive battle as platform-versus-platform, not grocer-versus-grocer, which is part of why some retailers have backed the deal despite ceding more control over their online storefronts to a single technology partner.

For commerce and e-commerce leaders, two practical implications follow. First, dynamic and personalized pricing is now a live regulatory risk, not a theoretical one: the FTC's 6(b) inquiry covers pricing and compensation methodology broadly, and retailers relying on third-party delivery marketplaces should know exactly how those partners price their catalog [4].

Second, membership and fee economics are consolidating fast: DoorDash's own estimate of the savings from combining DashPass and Instacart+ shows how much of the online grocery margin conversation now runs through subscription design rather than per-order pricing [5].

Oliver Wyman partner Bobby Gibbs noted that e-commerce memberships are central to closing the profitability gap between online and in-store grocery, since the most mature e-commerce offerings are the ones already linked to a membership program [1].