DoorDash Pays $17 Billion for Instacart's Ad Business It Couldn't Build

DoorDash acquired Instacart last week for $17 billion, and analysts read the deal as one advertising business buying another. Needham, the investment bank, published a note while the deal was still a well-sourced rumor. Needham's working theory: the deal combines the two advertising businesses. Everything else is logistics.

The easy read is that a delivery app bought another delivery app. The real story is that DoorDash bought a revenue mix it never managed to build itself. DoorDash paid $175 million for ad-tech company Symbiosys in 2025 to push its ads beyond its own app, and it has spent years pushing into grocery and retail. Buying Instacart is DoorDash's admission that organic building wasn't getting there fast enough.

What does the money look like?

Instacart's advertising and other revenue reached $297 million in the second quarter — 28.5% of everything it earned. Call it more than a quarter of the company. DoorDash passed a $1 billion run rate in ads two years ago and hasn't broken the number out since, roughly 10% of revenue by the author's count.

Both companies run billion-dollar ad businesses. Only one of them is an ad business.

That distinction matters. Delivery is low margin; advertising is high margin. Ads lift what the platform earns per order without charging the customer more — the beauty of a blended P&L. According to Wedbush, a financial securities firm, Instacart also brings a marketplace spanning many grocers, plus an ad business where brands pay to rank higher in search.

Why did Instacart set the bar?

Retail media was pitched as performance media for commerce: ads at the point of conversion, closed loop, every dollar accounted for. What brands got from most grocers was run-of-site advertising with a sales report attached.

Some grocers built serious networks, including Kroger Precision Marketing and Albertsons Media Collective. But even the good ones reached only one retailer's shoppers, leaving brands to stitch together a dozen buys to cover a category.

Instacart sat on top of the last mile. It could bundle baskets and get hyper-specific across hundreds of retailers in one buy. A brand bought the category once instead of negotiating with Kroger, then Costco, then Publix. That is the Uber model — a network of independent operators behind one front door — applied to grocery. Uber was reportedly in the mix to acquire Instacart too, but it backed out.

What changes for CPG brands?

Combined reach is the prize. DoorDash's share of US delivery spending grew from 44% to 59% over five years, while Instacart's fell from 26% to 18%. A CPG brand could now find the same household ordering dinner on DoorDash on Tuesday and groceries on Instacart on Saturday — restaurants, grocery and convenience in a single buy.

Instacart's differentiators justify its price tag, per the analysis. It is not reliant on individual grocery retailers because it holds direct consumer relationships: shoppers opt in to sharing loyalty card data in exchange for grocer rewards. It also runs its own planogram model, deciding product prominence based on its own brand deals. A grocer launching its own retail media platform cannot easily disrupt those direct relationships with consumers and brands. And because DoorDash built its relationships with restaurants, Instacart's grocer ties are genuinely additive.

Where does attribution still fall short?

Instacart nailed attribution inside its own app: a 14-day window, basket-level reporting, a clean room since January and MRC accreditation for impressions and clicks. What it never nailed is attribution to the retailer's total sales — the very thing grocers originally promised. Instacart sees the Instacart basket. Most grocery still happens in store, and that halo is modeled, not measured.

Brands kept spending anyway. They pay for the basket, not the proof. The burden of proof has shifted to the retailer: when a brand asks what its spend did in the store, the retailer is the one left without an answer.

The sector spent five years calling commerce media an emerging channel on the test budget. A public company just paid a 30% premium — $17 billion — largely for an ad business built on shopper data, and the analysts covering the deal are valuing that ad business, not the drivers. Commerce media is no longer just a line in the marketing plan; it is a line in the acquisition model.