Walmart Connect quietly rolled out the full general availability of its Adaptive Bidding Engine (ABE) on June 30, 2026, and the fallout inside performance marketing teams is already measurable. The system uses real-time first-party purchase signals from Walmart’s 240 million weekly U.S. shoppers to dynamically adjust cost-per-click bids at the SKU level — a capability Amazon’s Sponsored Products has offered for years but that Walmart has historically struggled to match in sophistication. Now, seven agency heads and a dozen brand-side operators tell Ecommerce Times that ABE is producing ROAS figures that are forcing genuine budget reallocation conversations at the executive level.
What Exactly Is Walmart Connect’s Adaptive Bidding Engine and How Does It Work?
ABE pulls from three data streams that Walmart has never previously made available inside a single bidding interface: in-store purchase history, Walmart+ membership tier data, and Sam’s Club cross-shopping signals. The engine runs a closed-loop auction, meaning bids are re-evaluated every 400 milliseconds against predicted conversion probability for a specific shopper segment — not just a keyword match. Walmart Connect General Manager Chris Cracchiolo described the system at a closed-door briefing in Bentonville in late June as “the first time we’ve actually deployed our full data moat in the auction.”
“We’ve been telling brands for three years that Walmart’s first-party data is the real differentiator. ABE is the first time that’s actually true at the bid level, not just in a deck.” — Sarah Engel, President, January Digital
The technical architecture matters for operators because it changes how campaigns should be structured. Unlike Amazon’s Sponsored Products, which optimizes primarily around search intent, ABE weights purchase recency and household income proxy data heavily. That means brands selling consumables — protein supplements, cleaning products, pet food — are seeing disproportionate early gains compared to brands in apparel or electronics where repeat purchase cycles are longer.
What ROAS Numbers Are Early Adopters Actually Reporting?
The figures circulating inside agency Slack channels are notable. Tinuiti, which manages Walmart Connect spend for over 80 brands, shared internal benchmark data with Ecommerce Times showing that ABE campaigns in the grocery and household essentials categories are averaging a 4.1x ROAS in the first 30 days — compared to a 2.8x baseline those same brands were running on legacy Walmart Sponsored Search. For context, Amazon Sponsored Products in the same categories is averaging 3.6x ROAS across Tinuiti’s book of business over the same period, according to the agency’s Q2 2026 internal reporting.
- Grocery and consumables: 4.1x ROAS on ABE vs. 2.8x on legacy Walmart Sponsored Search
- Home and garden: 3.4x ROAS on ABE, roughly flat versus legacy formats
- Apparel and softlines: 2.1x ROAS on ABE, underperforming legacy by ~15%
- Electronics: early data inconclusive; sample size still limited as of July 10
“The consumables number is what’s getting CFOs’ attention. When your Walmart ROAS starts beating your Amazon ROAS in the same category, that’s not a test budget conversation anymore.” — Evan Kirkpatrick, VP of Commerce Media, Wpromote
Kirkpatrick’s team moved three mid-market CPG brands — all doing between $8M and $22M annually on Amazon — to a 60/40 Amazon-to-Walmart ad split in July, down from a 78/22 split in Q1. He says two of those three brands are now at parity or better on Walmart ROAS and plans to push the ratio further if H2 holiday data holds.
Is This Finally the Moment Walmart Marketplace Closes the Seller Gap With Amazon?
The advertising story is only half of what’s moving the needle for operators. Walmart Marketplace also crossed a significant logistics threshold in June: its GoLocal delivery network now covers 88% of U.S. ZIP codes for next-day delivery on items fulfilled from Walmart Fulfillment Services (WFS), up from 71% at the start of 2026. That coverage improvement, combined with WFS storage rates that run roughly 18% lower than comparable Amazon FBA fees following Amazon’s March inbound placement fee increases, is prompting a meaningful WFS onboarding wave.
Rob Gonzalez, co-founder of Salsify, which manages product content syndication for thousands of brands selling across both platforms, says Walmart SKU activation requests through Salsify’s platform jumped 34% quarter-over-quarter in Q2 2026. “Brands that spent 2023 and 2024 treating Walmart as a secondary channel are now building dedicated Walmart content teams,” Gonzalez said. “The listing quality bar on Walmart has risen dramatically — rich media, 360-degree images, enhanced content — and brands that don’t meet it are getting suppressed in search just like on Amazon.”
How Are Amazon-Native Sellers Actually Responding to the Walmart Push?
The response from Amazon-centric operators is divided along brand size lines. Sellers doing under $1M annually are largely ignoring Walmart for now — the operational lift of managing a second catalog, a second ad interface, and WFS inbound logistics is prohibitive without dedicated headcount. But sellers in the $5M–$50M range, particularly those selling in consumable or replenishable categories, are showing real urgency.
Jason Goldberg, Chief Commerce Strategy Officer at Publicis, who tracks cross-platform seller behavior across a portfolio of over 200 brands, notes that the calculus shifted when ABE launched. “The historical knock on Walmart Connect was that even if you believed in the first-party data story, the tooling was too primitive to act on it. ABE removed that objection. Now the conversation is purely about category fit and operational readiness.”
“I have brand clients who have been Amazon-exclusive for five years who are now asking me what a 90-day WFS onboarding looks like. That question didn’t exist six months ago at this volume.” — Jason Goldberg, Chief Commerce Strategy Officer, Publicis
The seller tools ecosystem is responding in kind. Helium 10 confirmed to Ecommerce Times on July 9 that it is accelerating the roadmap for its Walmart keyword research and listing optimization modules, targeting a full feature parity release with its Amazon toolset by Q4 2026. Jungle Scout made a similar commitment at its annual operator summit in Austin in May. Both confirmations signal that the intelligence tooling layer — historically Amazon-exclusive — is treating Walmart as a genuine second platform rather than a footnote.
What Are the Real Operational Risks Brands Are Running Into?
Despite the momentum, operators flagging concerns are pointing to three specific friction points that Walmart has not fully resolved.
- Catalog suppression unpredictability: Walmart’s listing quality algorithm still de-lists SKUs without clear seller-facing error codes at a higher rate than Amazon, creating inventory blind spots inside WFS that can take 48–72 hours to surface and resolve.
- ABE transparency: Unlike Amazon’s Search Term Report, Walmart Connect’s ABE does not yet expose a granular query-level performance breakdown. Agencies can see aggregate conversion data but cannot easily isolate which shopper segments or search terms are driving ROAS — a limitation that caps optimization depth.
- WFS returns processing speed: Multiple operators report that WFS return-to-sellable timelines are running 9–14 days, compared to Amazon FBA’s 3–5 day standard. For fast-moving consumables, that lag creates meaningful lost Buy Box coverage during peak periods.
“ABE is genuinely impressive at the auction level, but you’re flying partially blind on the ‘why.’ Until Walmart opens up query-level data the way Amazon does, our optimization ceiling is lower than it should be.” — Sarah Engel, President, January Digital
Walmart Connect declined to comment on the timeline for query-level reporting transparency, citing ongoing product development.
What Does This Mean for Platform Budget Allocation Through the Holiday Season?
With Prime Day 2026 now in the rearview mirror — Amazon reported a record $3.1B in third-party seller sales over the two-day event on July 8–9 — attention is already turning to Q4. Agency media planners are modeling two divergent scenarios: one where ABE performance holds through Black Friday and Walmart earns a meaningful share of incremental holiday ad budgets, and one where the consumables skew of ABE’s early outperformance proves to be category-specific rather than platform-wide.
The consensus among the operators Ecommerce Times spoke with is that Walmart Connect will capture somewhere between 12% and 18% of combined Amazon-plus-Walmart marketplace ad spend by Q4 2026, up from an estimated 8% in Q4 2025. That delta — roughly $400M to $600M in redirected spend at scale — represents a structural shift in how performance budgets are allocated across the two dominant U.S. marketplaces, not a seasonal blip.
For DTC founders and marketplace operators, the immediate action item is straightforward: run an ABE pilot in your highest-velocity consumable or replenishable SKUs before September, when holiday inventory planning locks. The data you collect in August will determine whether Walmart deserves a seat at your Q4 budget table — or whether Amazon’s ecosystem lock-in still outweighs the arbitrage.
