Amazon and Walmart are building streaming ad businesses around the same objective: control the identity, buying, measurement, and transaction systems surrounding the video impression. Amazon brings Prime Video, Fire TV, Twitch, Amazon DSP, and an advertising business that generated $19.8 billion in revenue during the second quarter of 2026. Walmart is assembling a parallel stack through Walmart Connect, Vizio OS, WatchFree+, closed-loop sales attribution, and its pending acquisition of self-serve CTV specialist Vibe.co.
The retailer that owns this commerce layer can turn streaming services into inventory suppliers while keeping the advertiser relationship, performance data, and a larger share of the margin.
Amazon Already Owns the Workflow Walmart Is Buying
Amazon’s advantage starts with integration. Amazon DSP combines the company’s shopping, browsing, and streaming signals with inventory across Prime Video, Twitch, Fire TV, live sports, Amazon.com, and third-party publishers. Advertisers can plan, buy, optimize, and measure campaigns inside the same system. Interactive Prime Video formats can move a viewer from exposure to product exploration or purchase through a remote or mobile device.
That structure gives Amazon several ways to monetize the same customer session. Prime Video supplies attention. The DSP directs demand. Amazon’s retail business records commercial activity. Amazon Marketing Cloud and related measurement products connect the events. Advertising generated $19.8 billion in revenue during Q2 2026, up 26% year over year, which gives Amazon both the scale and the cash flow to expand its streaming inventory and buying tools.
Walmart’s position is smaller and less integrated, so it has been purchasing the missing pieces. The $2.3 billion Vizio acquisition added a TV operating system, WatchFree+, automatic content recognition data, home-screen distribution, and an established advertising business. The proposed Vibe.co acquisition adds a self-serve buying interface aimed at small and mid-sized advertisers. Walmart Connect already brings retail audiences and sales attribution. Walmart is combining those assets into a system that can reach the living room, accept budgets, identify likely buyers, and connect exposure to transactions.
The scale disparity explains the speed of Walmart’s dealmaking. Amazon built an advertising system outward from e-commerce. Walmart is extending a store-centered commerce system into media before Amazon converts its lead into default status across CTV buying.
Walmart’s Store Footprint Gives CTV a Different Conversion Signal
Walmart serves about 150 million U.S. customers each week online and in stores. Walmart is rolling out unified account sign-in across new Vizio OS TVs and Onn. TVs powered by Vizio, creating an identity framework that can connect streaming engagement with retail activity. Combining viewing data with Walmart account data remains subject to consent and privacy controls. That identity link can give Walmart Connect a clearer view of how streaming exposure relates to online and in-store purchasing.
The store network matters because many consumer outcomes never appear in an online checkout. Grocery, household goods, health products, and other frequent purchases can occur after a viewer sees an ad at home and visits a store days later. Walmart can measure those transactions within its own retail environment and sell advertisers against that visibility.
Amazon’s commerce graph remains broader across online shopping and digital behavior, and Prime gives the company a direct relationship across video, retail, subscriptions, and devices. Walmart’s differentiation comes from purchase frequency and physical retail coverage. Its CTV proposition becomes stronger when advertisers care about total retail sales rather than e-commerce sales alone.
That distinction also shapes inventory strategy. Walmart doesn’t need Vizio to become a premium studio. It needs Vizio OS to identify households, control merchandising surfaces, create ad supply, and connect viewing behavior with commerce outcomes. Content keeps the device useful. Commerce makes the device economically strategic.
The Buying Interface Can Control More Value Than the TV App
Vibe.co reveals where Walmart sees friction in the market. The company offers a self-serve CTV buying product for small and mid-sized advertisers, a segment that often lacks the budgets, agency support, and programmatic expertise required for traditional TV buying. Walmart plans to combine that interface with its commerce audiences, measurement, and Vizio inventory.
Amazon is widening access from the opposite direction. Its DSP supports self-service and managed-service buying, and its 2026 Comcast Advertising partnership extends Amazon streaming inventory to local and small-business advertisers.
Both companies are reducing the operational cost of buying TV while preserving their control over audience selection, campaign execution, and reporting.
The interface carries strategic value because it becomes the advertiser’s control panel. It determines which audiences appear, which inventory gets recommended, how budgets shift, which outcomes receive credit, and how campaigns get optimized. Once an advertiser builds workflows, creative, historical benchmarks, and measurement practices inside that system, switching becomes more expensive.
Streaming services can still supply premium impressions through these pipes. The retailer can own the demand relationship and decide how that demand moves across Prime Video, Vizio, FAST channels, live sports, and third-party publishers. That position gives the commerce company leverage even when it doesn’t own the underlying show or service.
Streaming Services Risk Becoming Supply Inside Retail Media
Retail media networks began near the digital shelf, where sponsored listings captured demand close to purchase. Amazon and Walmart are stretching that model across the TV screen. The budget can now begin with a retail audience, move through a retailer-controlled buying system, land on streaming inventory, and return to the retailer for attribution.
That chain changes the role of media owners. A streaming service integrated with Amazon DSP or Walmart Connect gains access to advertisers seeking commerce outcomes. It also risks surrendering part of the advertiser relationship, audience definition, optimization logic, and performance narrative to the intermediary.
Premium sports, major live events, and scarce tentpole programming are better positioned to preserve direct pricing power. Broad entertainment inventory faces greater substitution. When several services can deliver similar reach, the buyer will favor the system that offers better audience signals, easier execution, and stronger sales attribution.
The commerce layer can make the underlying inventory interchangeable enough to pressure publisher margins.
The result creates a familiar wholesale problem. Streaming services need incremental demand to improve ad fill and monetization. Retail media companies can aggregate that need across publishers, package it against purchase data, and keep the most valuable part of the client relationship.
The service supplies attention. The retailer supplies the proof that the attention produced revenue.
Closed-Loop Measurement Decides Who Gets Credit
The strongest commercial promise in both systems is closed-loop measurement. Amazon reports proprietary metrics such as detail-page views, add-to-list activity, new-to-brand performance, and omnichannel impact. Walmart says its Vizio integration can connect CTV engagement to purchases across its retail ecosystem.
That capability can move streaming budgets closer to performance media because advertisers no longer have to rely only on reach, completion rates, or modeled brand lift. A campaign can be evaluated against sales, household penetration, new buyers, and return on ad spend.
Measurement control also introduces risk. The same company can sell the audience, route the budget, provide inventory, define attribution, and report the result. Each retailer has an incentive to emphasize transactions its own system can observe. Advertisers gain accountability inside the ecosystem while comparison across ecosystems becomes harder.
Media owners face the same pressure. A service may generate the attention that begins a purchase journey, while the retailer’s attribution rules determine how much credit the service receives. That gives Amazon and Walmart influence over pricing and budget allocation far beyond the impressions they own directly.
The Streaming Wars Take
Amazon has the mature version of the commerce layer. It combines a scaled advertising business, a major streaming service, device distribution, live sports, a DSP, third-party publisher access, interactive formats, and transaction data. Walmart is building a credible counterweight by pairing store-level purchasing behavior with Vizio’s TV operating system and Vibe.co’s self-serve demand engine.
The strategic contest centers on four assets: authenticated identity, advertiser workflow, transaction data, and attribution. Content owners remain essential because they create the attention. Their leverage weakens when another company controls how that attention is packaged, purchased, measured, and converted into sales.
Streaming companies need direct advertiser tools, stronger first-party identity, and measurement that can travel across retail ecosystems. Otherwise, they’ll provide the inventory while commerce companies decide which audiences matter, which outcomes count, and where the next dollar goes.
The screen may still belong to the streaming service. The budget, attribution, and transaction are moving to the retailer.
The Streaming Wars is intentionally ad-free
We don’t run display ads. Not because we can’t, but because we don’t believe in them.
They interrupt the reading experience. They cheapen the work. And they burn advertisers’ money on impressions nobody actually wants.
So we chose a different model.
We say the things people in this industry are already thinking but don’t say out loud. We connect the dots beyond the headline and focus on explaining why things matter to the people working in this business.
If you believe industry coverage can exist without clutter and interruption, you can support it here → SUPPORT TSW.
Support is optional. But it directly funds research and continued coverage — and helps prove this model can work.
Support TSW →
