For most of the past decade, the retail media budget conversation started and ended with Amazon. But 2026 has complicated that calculus in ways even seasoned sellers didn’t fully anticipate. Walmart Connect posted 41% year-over-year revenue growth in Q1 2026, crossing an estimated $4.2 billion in annualized retail media revenue. Meanwhile, Amazon’s advertising services segment — already a $56 billion business as of its 2025 annual report — is showing signs of saturation, with Sponsored Products CPCs averaging $1.47 in Q1 2026, up 22% year-over-year according to data from Perpetua and Pacvue benchmarking reports.
The pressure is real. Sellers who built their entire growth model on Amazon Sponsored Products are watching their return on ad spend compress. And Walmart Connect, historically dismissed as a tertiary channel, is now demanding a serious strategic conversation.
This is a genuine head-to-head. Not a replacement story — but a real allocation question every brand and agency running seven figures in ad spend needs to answer for H2 2026 and beyond.
How Big Are These Networks — and Who Is Actually Shopping There?
Scale still matters, and Amazon’s lead remains enormous. Amazon had approximately 170 million Prime members in the U.S. as of early 2026, with its marketplace processing an estimated 4.5 billion product page views per day. Its advertising platform spans Sponsored Products, Sponsored Brands, Sponsored Display, DSP, and the newer AI-powered placements tied to Rufus search results.
Walmart’s footprint is different but not trivial. Walmart.com drew roughly 490 million monthly U.S. visitors in Q4 2025 (Similarweb), bolstered by its 4,700 physical stores and the growing Walmart+ membership base, which crossed 25 million subscribers in January 2026. Crucially, Walmart’s shopper skews toward grocery, household, and general merchandise — categories where margins are tight but purchase frequency is high.
“Amazon owns the high-intent buyer who already knows what they want. Walmart owns the cart-builder who’s stocking their house. If you sell anything that ends up in a home pantry or laundry room, you can’t ignore what Walmart Connect is doing right now.” — Kiri Masters, founder of Bobsled Marketing and retail media strategist
What Does the Ad Product Landscape Actually Look Like on Each Platform?
Amazon’s ad stack is deeper and more mature. Sellers and vendors can run:
- Sponsored Products — keyword and ASIN-targeted, still the workhorse of most Amazon PPC strategies
- Sponsored Brands — headline search placements with brand video and custom landing pages
- Sponsored Display — on and off-Amazon retargeting, audience targeting via Amazon’s first-party data
- Amazon DSP — programmatic display and video, primarily accessible to vendors and large sellers through Amazon account teams or agencies
- Rufus-integrated placements — newer AI-native ad units tied to Amazon’s conversational search layer, currently in limited rollout
Walmart Connect’s product set has expanded meaningfully but remains narrower. Core products include:
- Sponsored Products — search and browse placements across Walmart.com and the app
- Sponsored Brands — brand amplifier placements, launched in 2023 and gaining traction in 2025-2026
- Display advertising — on-site display and offsite via Walmart DSP, powered by The Trade Desk partnership
- In-store digital — self-checkout screens and in-store radio, giving Walmart Connect an omnichannel dimension Amazon genuinely cannot match
- Search Brand Amplifier video — rolled out broadly in late 2025
“The Trade Desk integration was a turning point for Walmart Connect. We’re now running offsite prospecting campaigns that close on Walmart.com, and the match rates on their first-party data are genuinely competitive with what we see on Amazon DSP.” — Elizabeth Marsten, Group Director of Marketplace Strategic Services at Tinuiti
How Do CPCs and ROAS Actually Compare in 2026?
This is where the numbers tell the most important story. Based on Pacvue’s Q1 2026 retail media benchmark report and Tinuiti’s Walmart Connect analysis:
| Metric | Amazon Ads (Q1 2026) | Walmart Connect (Q1 2026) |
|---|---|---|
| Avg. Sponsored Products CPC | $1.47 | $0.61 |
| Avg. Sponsored Brands CPC | $1.89 | $0.74 |
| Avg. Sponsored Products ROAS | 4.2x | 5.8x |
| Year-over-Year CPC Growth | +22% | +14% |
| Platform Ad Revenue (Annualized 2026 est.) | ~$58B | ~$4.2B |
| Advertiser Count (est.) | 1.5M+ | ~65,000 |
| DSP/Programmatic Access | Yes (Amazon DSP) | Yes (via The Trade Desk) |
| In-Store Inventory | No | Yes (4,700+ stores) |
| Offsite Audience Targeting | Yes (Sponsored Display, DSP) | Yes (Walmart DSP / TTD) |
| Attribution Window Default | 14-day click, 1-day view | 30-day click, 1-day view |
The CPC gap is striking. Walmart Connect’s lower advertiser density — approximately 65,000 active advertisers versus Amazon’s estimated 1.5 million-plus — means auction pressure is fundamentally different. Categories like home goods, pet supplies, and personal care are seeing 50-60% lower CPCs on Walmart Connect versus equivalent Amazon placements, according to agency data shared with Ecommerce Times.
But ROAS doesn’t tell the full story. Amazon’s conversion rates on high-intent searches still outperform Walmart.com’s for most non-grocery categories. Sellers in electronics, supplements, and specialty apparel consistently report that Amazon’s search intent is stronger, even if the cost to capture it is higher.
Which Categories Should Shift Budget to Walmart Connect First?
Not every seller has a compelling case to shift budget. But agency operators running diversified portfolios are identifying clear patterns in where Walmart Connect outperforms:
- Consumables and grocery-adjacent — Walmart’s core shopper is a high-frequency household buyer. Cleaning products, paper goods, pet food, and OTC health items perform exceptionally well.
- Private label brands in commoditized categories — Where Amazon’s algorithm increasingly favors Amazon Basics and vendor-direct listings, Walmart Connect’s less saturated marketplace offers shelf space that’s genuinely winnable.
- Seasonal and general merchandise — Back-to-school, holiday décor, and outdoor furniture categories where Walmart’s physical store traffic creates meaningful omnichannel lift.
- Value-positioned brands — Walmart’s shopper skews toward household income under $75,000. Premium DTC brands with $60+ AOVs may see lower conversion rates unless they’ve built a Walmart-specific price architecture.
“We moved 15% of a client’s Amazon Sponsored Products budget to Walmart Connect in Q4 2025 for their household cleaning line. CPC was 55% lower, conversion rate was about 20% lower, but the net ROAS was 6.1x versus 4.3x on Amazon. We’re holding that allocation through 2026.” — Mike Feldman, SVP of Retail Media at Havas Market
What Are the Operational Barriers to Running Both Networks Simultaneously?
The tactical challenge of running Amazon Ads and Walmart Connect in parallel is often underestimated. The platforms require separate campaign infrastructure, separate creative assets, and — critically — separate catalog management. Walmart’s content requirements differ from Amazon’s: image dimensions, attribute mapping, and category taxonomy don’t translate cleanly, especially for sellers who built their product listings inside Seller Central.
Tools like Pacvue, Perpetua, and Intentwise now offer unified dashboards that surface Amazon and Walmart Connect data side by side, with cross-platform budget pacing. Pacvue’s Walmart Connect module, updated in March 2026, added automated dayparting and bid rules that mirror its Amazon functionality. Intentwise’s analytics layer introduced a cross-retailer share-of-voice report in January 2026 that’s become a staple for multi-channel agency teams.
Fulfillment is the other operational lever. Walmart Connect’s ad performance is meaningfully tied to whether a seller is on Walmart Fulfillment Services (WFS). WFS-fulfilled listings receive preferential placement in search results — a dynamic that mirrors FBA’s relationship to Amazon’s ad algorithm. As of Q1 2026, WFS processed approximately 35% of third-party orders on Walmart.com, up from 22% in Q1 2024.
What Does the 2026 Budget Allocation Look Like for Sophisticated Sellers?
Agency operators and internal brand teams are landing on a range of allocation frameworks depending on category and scale. The most common pattern emerging in 2026 among seven-figure sellers on both platforms:
- 70-80% Amazon / 20-30% Walmart Connect for most non-grocery categories, with the Walmart allocation weighted toward Sponsored Products and display retargeting
- 50-50 splits in household consumables and grocery-adjacent SKUs, where Walmart’s shopper profile and lower CPCs justify deeper investment
- Amazon-only remaining the default for electronics, luxury goods, and specialty categories where Walmart.com’s shopper intent and category depth haven’t matured
The underlying thesis from most retail media strategists: Amazon is a must-defend channel where efficiency optimization is the priority. Walmart Connect is the growth opportunity — lower competition, improving ad product depth, and a shopper base that is genuinely additive rather than duplicative for most categories.
The brands that figure out how to run both networks with coordinated creative, aligned catalog strategy, and cross-platform attribution will have a structural cost advantage in retail media as Amazon’s auction environment continues to tighten. For operators still treating Walmart Connect as an afterthought, Q4 2026 is the forcing function that will change that calculus.
