# DoorDash Stock After the Instacart Deal: Buying the Scale Its Network Can't Supply Yet — InvestMoat Research

_DoorDash is paying about $17 billion for a grocery app growing slower than Uber's grocery line and Walmart's delivery. I think it's buying orders per store and per warehouse, the cost advantage its network can't supply soon enough, and that advantage doesn't exist yet._

_Published: November 2, 2026 · Last reviewed: November 2, 2026 · Canonical page: https://www.investmoat.com/research/doordash-instacart-and-the-scale-its-network-cant-supply_
_Tags: Platforms, Network Effects, Scale, Grocery, Antitrust_
_Covers: DASH, UBER, AMZN, WMT_

## Summary

On October 29, 2026 DoorDash agreed to buy Instacart for about $17 billion. Instacart's GTV grew 15% in Q3 2026, slower than Uber's grocery and retail business (about 40% as of Q2 2026) and Walmart's store-fulfilled delivery (40%), and DoorDash's own US grocery is outgrowing its restaurants. So I don't think DoorDash is mainly buying growth. I think it's buying density: enough orders per store and per warehouse to make grocery delivery cheaper, which its network can't supply soon enough and which doesn't exist as a moat yet. Critics call it a monopoly, and they have a real point about grocers who rely on third-party apps. The case against me is that DoorDash's grocery economics may get there without the deal, and that advertising or retailer software may be the real prize.

## What would prove this wrong

If DoorDash's Q3 2027 results release (due around late October 2027), before any Instacart close, says its US grocery and retail unit economics have matched or passed its US restaurant category, or discloses a grocery contribution margin at or above restaurants, its own network supplied the density and I'm wrong that it needed to buy it.

_Status as of November 2, 2026: **holding**._

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Instacart GTV growth: +15% · Uber grocery and retail bookings: ~+40% · Walmart store-fulfilled delivery: +40% · Instacart deal: ~$17B

Instacart's order value grew 15% in Q3 2026. Uber's grocery and retail business was growing about 40% as of Q2 2026. Walmart's store-fulfilled delivery grew 40% in its latest quarter. DoorDash's own US grocery is growing more than twice as fast as its restaurants. And DoorDash has just agreed to pay about $17 billion for Instacart, the slower of those businesses, so I don't think it's mainly paying for growth.

Critics call the deal a monopoly. I think that misses what's being bought too. **DoorDash's network already wins grocery customers, but it can't supply enough orders per store and per warehouse soon enough to make grocery delivery cheap. That's what the $17 billion is for, and that cost advantage doesn't exist yet.**

## What DoorDash says it's buying

DoorDash's [Q3 release](https://s22.q4cdn.com/280253921/files/content_files/Q3-2026-Earnings-Press-Release.pdf) is blunt about grocery after five years of trying: "the product still isn't there." Consumers, it says, "pay a premium for imperfect delivery", and "a grocery store was never set up for delivery." When DoorDash runs the inventory itself in its DashMart warehouses, it reports 99%+ accuracy and delivery more than 10 minutes faster. Here's the pitch that follows from that.

**DoorDash's case in its Q3 2026 release. Most of it is about the cost of filling and moving an order.**

| DoorDash's words | What I take from it |
| --- | --- |
| "…the combined reach will increase density across the grocery store network, helping increase delivery speed, lower fulfillment costs…" | More orders per store, from day one after close |
| "Managing inventory inside a warehouse is a fixed cost business. Scale is a necessary (though insufficient) input…" | Warehouses only pay with volume, and DoorDash admits volume won't be enough |
| "…Instacart's scale will help amortize the fixed cost of managing inventory on behalf of grocers." | Whether store-picked orders can move to warehouses is the open question, since grocers own those customers |
| "…a win for advertisers…" and "Instacart's leading Enterprise software" | Two other prizes, which I come back to below |

_Figures as of Q3 2026 release, October 29, 2026. Source: [DoorDash Releases Third Quarter 2026 Financial Results](https://s22.q4cdn.com/280253921/files/content_files/Q3-2026-Earnings-Press-Release.pdf)._

I think that's a different thing from the network effect DoorDash is known for. Its network brings a member into the app, and a member who pays for takeout will try groceries there. Over time that adds orders per store, but slowly, and Instacart adds them on day one after close. What it costs to fill a cart depends on how many orders a picker and courier can handle from one store on one trip, or how full a warehouse runs. Walmart's growth shows store picking can work, but Walmart owns the shelves, the stock data and the staff. An app picks from someone else's shelves.

**Live moat ratings. Look at the scale rating for each company: it's what the delivery apps would have to earn against the two retailers.**

| Ticker | Scale Economics | Network Effects | Transaction Embedding |
| --- | --- | --- | --- |
| [DASH](https://www.investmoat.com/stocks/dash) | na | strong | strong |
| [UBER](https://www.investmoat.com/stocks/uber) | na | strong | strong |
| [AMZN](https://www.investmoat.com/stocks/amazon) | strong | strong | strong |
| [WMT](https://www.investmoat.com/stocks/walmart) | strong | intact | intact |

Here's where I part ways with our own DoorDash analysis. It treats scale as the network counted twice, and says the deal would deepen its grocery network if it closes. That's fair for today, when neither app gets a separate scale rating. I think density is a cost advantage that has to be earned on its own, and I'd want to see the cost numbers first. Amazon said with Q3 results that it's on track to cut cost to serve per unit for a fourth straight year, so the target is moving.

## Instacart is the slow one

**The latest grocery growth each company reports. The measures differ, and DoorDash and Amazon give no comparable rate, so read this for direction.**

| Company | How it delivers grocery | Latest reported growth |
| --- | --- | --- |
| Instacart | Shoppers pick in retailers' stores | GTV +15%, orders +10% (Q3 2026) |
| DoorDash | Couriers from stores, plus DashMart warehouses | US grocery and retail growing more than double the pace of US restaurants, no figure given (Q3 2026); DashPass members placed about 75% of those orders (Q2 2026) |
| Uber | Couriers from stores | Grocery and retail about +40% for several quarters, $15B annualised; all delivery bookings +26% (Q2 2026) |
| Walmart | Its own stores | Store-fulfilled delivery +40%, US e-commerce +24% (quarter ended July 31, 2026) |
| Amazon | Its own network | Fresh groceries and essentials growing about 3x the rest of its store (Q3 2026); Prime same-day fresh orders more than tripled in a year, per Supermarket News |

_Figures as of Latest reported quarter as of November 2, 2026. Source: [Instacart Announces Third Quarter 2026 Financial Results](https://www.prnewswire.com/news-releases/instacart-announces-third-quarter-2026-financial-results-302923609.html); [DoorDash Releases Third Quarter 2026 Financial Results](https://s22.q4cdn.com/280253921/files/content_files/Q3-2026-Earnings-Press-Release.pdf); [DoorDash Releases Second Quarter 2026 Financial Results](https://s22.q4cdn.com/280253921/files/doc_financials/2026/q2/Q2-2026-Earnings-Press-Release.pdf); [Uber Q2 2026 prepared remarks](https://s23.q4cdn.com/407969754/files/doc_earnings/2026/q2/transcript/Uber-Q2-26-Prepared-Remarks.pdf); [Uber Announces Results for Second Quarter 2026](https://www.businesswire.com/news/home/20260805020613/en/Uber-Announces-Results-for-Second-Quarter-2026); [Walmart earnings release, Q2 FY27](https://corporate.walmart.com/news/2026/08/20/walmart-releases-q2-fy27-earnings); [Amazon stores growth, Q3 2026 earnings](https://www.aboutamazon.com/md/news/company-news/amazon-stores-growth-q3-2026-earnings); [Amazon touts perishables growth in Q3](https://www.supermarketnews.com/finance/amazon-touts-perishables-growth-in-q3)._

Uber is the name that matters here. It's growing grocery at Walmart's delivery pace with couriers from stores, which is why I'm not arguing that an app can't grow in grocery. Its remarks don't say the 40% is organic or US-only, and Uber is buying scale of its own, with Delivery Hero pending. It doesn't report a grocery margin either, so we can't see what those orders earn. Growth isn't what's scarce. Cost is what neither app can show yet.

Instacart isn't sick, though. Its GTV over the last four quarters adds up to about $41 billion, far above Uber's $15 billion annualised, so in dollars it's still adding at least as much. The next chart also argues with me: its growth has picked up while Walmart's US e-commerce has slowed. Its orders slowed once the boost from the $10 basket minimum wore off, and bigger baskets did the rest.

**Year-on-year growth. In Q2 2026, the last quarter with both figures, Instacart was 10 points behind Walmart's US e-commerce, down from 18 points in Q3 2025. I'd rather chart Uber's grocery and Walmart's delivery, but neither is reported consistently each quarter, so this is the closest series. Walmart's figure includes marketplace and advertising, and its quarters end a month after the labels.**

| Period | Walmart US e-commerce | Instacart GTV | Instacart orders |
| --- | --- | --- | --- |
| Q3 2025 | 28% | 10% | 14% |
| Q4 2025 | 27% | 14% | 16% |
| Q1 2026 | 26% | 13% | 10% |
| Q2 2026 | 24% | 14% | 9% |
| Q3 2026 | — | 15% | 10% |

_Figures as of Q3 2026 for Instacart; quarter ended July 31, 2026 for Walmart. Source: [Instacart Announces Third Quarter 2026 Financial Results](https://www.prnewswire.com/news-releases/instacart-announces-third-quarter-2026-financial-results-302923609.html); [Instacart Announces Second Quarter 2026 Financial Results](https://www.stocktitan.net/news/CART/instacart-announces-second-quarter-2026-financial-0vjra166lfnz.html); [Instacart Q1 2026 press release (8-K exhibit 99.1)](https://www.sec.gov/Archives/edgar/data/1579091/000157909126000032/q12026pressrelease.htm); [Instacart Q4 2025 shareholder letter (8-K exhibit)](https://www.sec.gov/Archives/edgar/data/1579091/000157909126000006/cartfourthquarter2025sha.htm); [Instacart Q3 2025 shareholder letter (8-K exhibit)](https://www.sec.gov/Archives/edgar/data/1579091/000157909125000095/cartthirdquarter2025shar.htm); [Walmart earnings release, Q2 FY27](https://corporate.walmart.com/news/2026/08/20/walmart-releases-q2-fy27-earnings); [Walmart earnings release, Q1 FY27](https://mms.businesswire.com/media/20260520663095/en/2811728/1/Earnings_Release_FY27_Q1.pdf?download=1); [Walmart earnings release, Q4 FY26](https://stock.walmart.com/sec-filings/all-sec-filings/content/0000104169-26-000032/earningsreleasefy26q4.htm); [Walmart earnings release, Q3 FY26](https://stock.walmart.com/sec-filings/all-sec-filings/content/0000104169-25-000177/earningsreleasefy26q3.htm)._

## The monopoly argument depends on which market you draw

**The share figures being quoted. Each measures a different pool, and only the last counts retailers' own delivery. These are third-party estimates, and I couldn't check their methods.**

| Measure | Figure | Source |
| --- | --- | --- |
| Share of all US delivery-app orders, 2025, restaurants included | DoorDash 65.1%, Uber Eats 25.8%, Instacart 9.1% | YipitData via Reuters |
| Share of spending on major US delivery apps, Q3 2026, restaurants included | DoorDash 59%, Instacart and Uber Eats about 18% each | Consumer Edge via FoodNavigator |
| Instacart's share of third-party US grocery delivery, 2026 | About 65% | eMarketer via Fast Company |
| Walmart and Amazon's share of online grocery sales | Roughly half | Fast Company, no source named |

_Figures as of As reported October 29 and 30, 2026. Source: [DoorDash's Instacart deal may draw FTC scrutiny amid cost-of-living concerns](https://www.investing.com/news/stock-market-news/doordashs-instacart-deal-may-draw-ftc-scrutiny-amid-costofliving-concerns-4984745); [DoorDash's Instacart deal promises CPG better ad reach, raises antitrust concerns](https://www.foodnavigator.com/Article/2026/10/30/doordashs-instacart-deal-cpg-reach-and-antitrust-concerns/); [DoorDash acquiring Instacart: restaurants and grocery](https://www.fastcompany.com/91631671/doordash-acquiring-instacart-restaurants-grocery)._

The critics' best argument is about grocers and data. Lee Hepner of the American Economic Liberties Project, an anti-monopoly group, [called it](https://www.foodnavigator.com/Article/2026/10/30/doordashs-instacart-deal-cpg-reach-and-antitrust-concerns/) "a food delivery monopoly". Lindsay Owens of the advocacy group Groundwork Collaborative [told Reuters](https://www.investing.com/news/stock-market-news/doordashs-instacart-deal-may-draw-ftc-scrutiny-amid-costofliving-concerns-4984745) it would "consolidate an alarming amount of surveillance and pricing technology in one company". FoodNavigator reports that an investigation by Consumer Reports and Groundwork found Instacart price tests could produce differences of up to 23% on certain products. A small grocer that can't build its own delivery has few other apps to turn to, and that concern is real.

For shoppers, I think the limit is that Walmart and Amazon are one tap away. PitchBook's Alex Frederick makes the same point: "The real competition is Walmart and Amazon." I'm not a lawyer and can't tell you how the FTC will draw the line.

## What a holder is signing up for

**The terms. The $1.25B fee comes from MLex's report, since I couldn't open the termination section of the merger agreement myself.**

| Term | Detail |
| --- | --- |
| Price | $65 a share, about $17B of equity value, a 26% premium to the October 22 close |
| Payment | At least 75% cash, up to 25% DoorDash stock |
| Funding | Cash on hand and debt, with a 364-day JPMorgan bridge loan committed; investment-grade ratings targeted |
| Expected close | End of 2027 or first half of 2028, after US, Canadian and Israeli reviews |
| If antitrust stops it | DoorDash pays Instacart $1.25B, per MLex |
| Payoff | $500M or more of annual net synergies over several years, with more than 100% reinvested in the first year after close |

_Figures as of October 29 and 30, 2026. Source: [DoorDash Releases Third Quarter 2026 Financial Results](https://s22.q4cdn.com/280253921/files/content_files/Q3-2026-Earnings-Press-Release.pdf); [DoorDash, Instacart expect vetting in US, Canada, Israel, agree to termination fees](https://www.mlex.com/mlex/articles/2544031)._

DoorDash's free cash flow was $787 million in Q3 2026, so this is a large debt-funded bet for its size. Until it closes, a holder owns the restaurant business and DoorDash's own grocery growth, and our scores don't count Instacart. **I wouldn't pay extra for a grocery cost advantage until DoorDash reports one,** and it doesn't publish a grocery fulfilment cost today. Rivals also get the wait: Amazon Now is already in over 450 towns and cities worldwide as of Q3 2026.

## Where I could be wrong

The first reply is that the network is enough. DashPass members placed about 75% of DoorDash's US grocery and retail orders in Q2 2026, and I think membership is a big part of how it got there. DoorDash also said in that Q2 release that grocery unit economics were improving significantly. If that carries on, density arrives on its own and DoorDash overpaid. My answer is that DoorDash itself says the product isn't good enough yet, and it's choosing to pay $17 billion rather than wait. But if its grocery economics catch restaurants without Instacart, I'd give up the argument, which is why that's my test.

The second is that delivery isn't the prize. Instacart's advertising and other revenue was $331 million in Q3 2026, up 23%. Frederick argues advertising "may matter more to the investment case than delivery fees", and Walmart Connect grew 43% excluding VIZIO in the July quarter. Instacart's Q3 adjusted EBITDA of $342 million also makes the equity price about 12 times that quarter annualised. I think ads are real value, and they may justify the price. But an ad business follows purchase volume, so it also needs the delivery product to keep up with Amazon and Walmart.

The third is software, and it's where I'm least sure. Instacart's Storefront ran more than 380 grocers' online stores as of its Q4 2025 letter, and it works with more than 2,200 retail banners. Independent grocers can't build what Walmart has, so being wired into their operations could be a stickier moat than density. The risk is the one critics raise: those grocers may not want to hand more of their business to one company.

## What would settle it

Uber reports on November 4, and Walmart reports its October quarter later this month. If Uber keeps its pace while Walmart's slows, couriers from stores look good enough for now, and I'd watch whether Uber starts talking about grocery margins. The test I care about is DoorDash's own: whether its Q3 2027 release says or shows grocery unit economics have caught its restaurants before Instacart arrives. If it does, its network supplied the density. If it doesn't say so, the test hasn't tripped, but that isn't proof I'm right either. The proof would be DoorDash publishing what a grocery order costs to fill. Until then, the moat in this deal is a forecast.

**InvestMoat's live scores for the four. DoorDash's don't count Instacart until the deal closes, and Uber's reflect Q2 until it reports.**

| Ticker | Name | Moat | Growth | Valuation | Composite | Note |
| --- | --- | --- | --- | --- | --- | --- |
| [DASH](https://www.investmoat.com/stocks/dash) | DoorDash, Inc. | 83 | 80 | 81 | 85 | Instacart not scored until close, targeted for end-2027 to first half of 2028 |
| [UBER](https://www.investmoat.com/stocks/uber) | Uber Technologies | 81 | 78 | 85 | 85 | Grocery and retail about +40% (Q2 2026); reports Q3 on November 4, 2026 |
| [AMZN](https://www.investmoat.com/stocks/amazon) | Amazon.com Inc. | 89 | 81 | 83 | 89 | Grocery gross sales nearly $250B over 12 months, essentials included (Q3 2026) |
| [WMT](https://www.investmoat.com/stocks/walmart) | Walmart Inc. | 69 | 68 | 71 | 69 | Store-fulfilled delivery +40% (quarter ended July 31, 2026) |

_Valuation and composite above use each asset's static valuation score; the live site recomputes them against the current market price._

## Sources

1. [DoorDash Releases Third Quarter 2026 Financial Results](https://s22.q4cdn.com/280253921/files/content_files/Q3-2026-Earnings-Press-Release.pdf) — DoorDash, October 29, 2026 (press-release)
2. [Instacart Announces Third Quarter 2026 Financial Results](https://www.prnewswire.com/news-releases/instacart-announces-third-quarter-2026-financial-results-302923609.html) — Instacart via PR Newswire, October 29, 2026 (press-release)
3. [Instacart Announces Second Quarter 2026 Financial Results](https://www.stocktitan.net/news/CART/instacart-announces-second-quarter-2026-financial-0vjra166lfnz.html) — Instacart via Stock Titan, August 6, 2026 (press-release)
4. [Instacart Q1 2026 press release (8-K exhibit 99.1)](https://www.sec.gov/Archives/edgar/data/1579091/000157909126000032/q12026pressrelease.htm) — Instacart via SEC EDGAR, May 6, 2026 (filing)
5. [Instacart Q4 2025 shareholder letter (8-K exhibit)](https://www.sec.gov/Archives/edgar/data/1579091/000157909126000006/cartfourthquarter2025sha.htm) — Instacart via SEC EDGAR, February 12, 2026 (filing)
6. [Instacart Q3 2025 shareholder letter (8-K exhibit)](https://www.sec.gov/Archives/edgar/data/1579091/000157909125000095/cartthirdquarter2025shar.htm) — Instacart via SEC EDGAR, November 10, 2025 (filing)
7. [Walmart earnings release, Q2 FY27](https://corporate.walmart.com/news/2026/08/20/walmart-releases-q2-fy27-earnings) — Walmart, August 20, 2026 (press-release)
8. [Walmart earnings release, Q1 FY27](https://mms.businesswire.com/media/20260520663095/en/2811728/1/Earnings_Release_FY27_Q1.pdf?download=1) — Walmart via Business Wire, May 21, 2026 (press-release)
9. [Walmart earnings release, Q4 FY26](https://stock.walmart.com/sec-filings/all-sec-filings/content/0000104169-26-000032/earningsreleasefy26q4.htm) — Walmart, February 19, 2026 (filing)
10. [Walmart earnings release, Q3 FY26](https://stock.walmart.com/sec-filings/all-sec-filings/content/0000104169-25-000177/earningsreleasefy26q3.htm) — Walmart, November 20, 2025 (filing)
11. [Amazon stores growth, Q3 2026 earnings](https://www.aboutamazon.com/md/news/company-news/amazon-stores-growth-q3-2026-earnings) — Amazon, October 29, 2026 (company-site)
12. [Amazon touts perishables growth in Q3](https://www.supermarketnews.com/finance/amazon-touts-perishables-growth-in-q3) — Supermarket News, October 30, 2026 (third-party)
13. [Uber Announces Results for Second Quarter 2026](https://www.businesswire.com/news/home/20260805020613/en/Uber-Announces-Results-for-Second-Quarter-2026) — Uber via Business Wire, August 5, 2026 (press-release)
14. [DoorDash, Instacart expect vetting in US, Canada, Israel, agree to termination fees](https://www.mlex.com/mlex/articles/2544031) — MLex, October 29, 2026 (third-party)
15. [DoorDash's Instacart deal may draw FTC scrutiny amid cost-of-living concerns](https://www.investing.com/news/stock-market-news/doordashs-instacart-deal-may-draw-ftc-scrutiny-amid-costofliving-concerns-4984745) — Reuters via Investing.com, October 29, 2026 (third-party)
16. [DoorDash's Instacart deal promises CPG better ad reach, raises antitrust concerns](https://www.foodnavigator.com/Article/2026/10/30/doordashs-instacart-deal-cpg-reach-and-antitrust-concerns/) — FoodNavigator, October 30, 2026 (third-party)
17. [DoorDash acquiring Instacart: restaurants and grocery](https://www.fastcompany.com/91631671/doordash-acquiring-instacart-restaurants-grocery) — Fast Company, October 29, 2026 (third-party)
18. [Uber Q2 2026 prepared remarks](https://s23.q4cdn.com/407969754/files/doc_earnings/2026/q2/transcript/Uber-Q2-26-Prepared-Remarks.pdf) — Uber, August 5, 2026 (transcript)
19. [DoorDash Releases Second Quarter 2026 Financial Results](https://s22.q4cdn.com/280253921/files/doc_financials/2026/q2/Q2-2026-Earnings-Press-Release.pdf) — DoorDash, August 5, 2026 (press-release)

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