DoorDash's $17 Billion Instacart Deal: Five Questions Buyers Want Answered

DoorDash plans to acquire Instacart for approximately $17 billion, and media buyers are already mapping what the deal means for retail media. The takeover, announced almost a week ago, isn't expected to close until the end of 2027 at the earliest or the first half of 2028 at the latest. Before then, it still needs approval from the Federal Trade Commission without an antitrust flag.

"In the short term, I don't expect this to meaningfully disrupt the retail media landscape. But longer term, the potential is significant," said Nik Hengel, vp of analytics at New Engen digital marketing agency.

While regulators review the deal, buyers are focused on three things: costs, consolidation and capabilities. Here are the five questions on their minds.

What new ad capabilities could a combined DoorDash and Instacart offer?

The audience numbers alone get advertisers' attention. DoorDash reported 993 million total orders in its Q3 earnings; Instacart reported 91.4 million orders in the same period. Beyond reach, the combined company could build a single ecosystem with closed-loop data reporting and a scaled ads platform.

Size doesn't guarantee ease, though. "But bigger platforms don't automatically mean simplicity," said Bill Wise, CEO and co-founder of adtech company Mediaocean. "Brands still have to manage their investments across multiple ecosystems, each with its own data, rules, and measurement."

DoorDash Ads and Instacart Ads already operate as separate businesses with their own tech stacks. The real test is integration — whether the two can merge their advertising components without upending how advertisers buy media.

Scott Paternoster, CEO of performance-marketing agency Chief Media, has bought ads through Instacart for two years and doesn't expect the buying process to change immediately. "I just see it as expanding the footprint of reach and targeting from home delivery to prepared meal home delivery to grocery delivery, and understanding the data and the connections across those two types of audiences and retargeting across them," he said.

Takeaway: more reach and richer data are on the table, but integration risk sits alongside them.

How will media buying and pricing change?

U.S. retail media spend is expected to reach nearly $70 billion by the end of this year. With DoorDash and Instacart's combined audience and closed-loop reporting potential, the case for premium pricing is there.

"There's so much data within this that is actually really valuable for advertisers because it spans like every retailer," said Briana Finelli, vp of brand and commerce media at Goodway Group.

Nobody knows what CPMs will look like. Advertisers are cautious about earmarking dollars in advance because new ad programs take time to get off the ground — OpenAI's ads in ChatGPT being the current case in point.

Takeaway: pricing power is plausible, but buyers won't commit before the product exists.

Can they compete with Walmart and Amazon?

Walmart and Amazon are expected to capture more than 89% of incremental retail media ad dollars this year, per eMarketer. A combined DoorDash-Instacart could cut into that share — but the gap is wide.

Both companies are billion-dollar businesses independently, per AdExchanger. Walmart's global ad business pulled in nearly $6.4 billion last year. Amazon made $21.3 billion in Q4 of 2025 alone.

"Amazon and Walmart already have a substantial head start, and the longer it takes to capitalize on that combined data, the wider that gap could become," Hengel said.

Smaller retail media networks face an even harder sell. "Either the ability to prove value in the media itself through transaction level performance data, or the ability to unify and connect their audiences to a larger scale ecosystem, is going to be more important in the coming years," said Greg Carlucci, senior director analyst at Gartner.

Takeaway: scale buys a seat at the table, not the head of it.

Is this the start of retail media consolidation?

Buyers and analysts broadly read the deal as the first major step in retail media consolidation. Advertisers are scrutinizing spend more closely, and consolidation helps retailers build the scale, technology and inventory they need to compete for dollars.

"This acquisition is an example point of the importance of scale and measurement that is in commerce media right now," Carlucci said.

The reach spans "grocery, restaurants, and retail," said Lidiane Jones, CEO of Integral Ad Science (IAS).

Takeaway: expect more deals, not fewer.

Can the combined company deliver independent, credible measurement?

Retail media has long struggled with measurement and incrementality. The acquisition gives advertisers more data, but access doesn't equal better measurement.

The two companies bring some credentials. DoorDash received the Alliance for Audited Media's Incrementality Certification in September, an independent audit verifying a platform's incrementality approach against industry standards. Instacart has Media Rating Council accreditation dating to 2024 and has partnered with the Interactive Advertising Bureau to study measurement.

The industry still lacks a standard definition of incrementality, which makes it hard to prove even with more data. Independent verification — so retailers aren't grading their own homework — still matters.

"As the category grows, it will be important to pair that scale with consistent, independent evidence of media quality and business outcomes," Jones said. "The platforms that make that connection will be better positioned to earn sustained investment."

With closing still more than two years out, the platforms that pair scale with verifiable outcomes will be the ones that convert this deal's promise into sustained ad dollars.