Amazon’s Buy with Prime program quietly crossed 50 million cumulative transactions in Q1 2026, according to figures shared with select merchant partners last month — a milestone that is reshaping how DTC founders think about checkout friction, Prime loyalty as a conversion lever, and what it actually costs to own a direct customer relationship outside Amazon’s walled garden.
The number, first reported by merchant consultants briefed during Amazon’s seller summit in Seattle in late April, represents a roughly 3x increase from the 17 million transactions the program had logged by the end of 2024. Amazon confirmed the milestone publicly on May 19, framing it as validation that Prime members spend meaningfully more when they encounter the familiar checkout badge on independent Shopify and WooCommerce storefronts.
For the ecosystem of DTC operators, 3PLs, and payment processors watching closely, the implications are substantial — and not entirely comfortable.
What Is Driving Buy with Prime’s Accelerating Adoption Among DTC Brands?
The growth is not accidental. Amazon spent the first half of 2025 aggressively reducing friction for Shopify merchants through its native Shopify app, which now enables one-click Buy with Prime installation without requiring merchants to touch theme code. That integration — available since August 2025 — lowered the technical barrier enough that mid-market brands running on Shopify Plus began adopting the program at scale.
According to agency leaders, conversion lift is the primary driver. Brands in the health and wellness, home goods, and pet supplies categories are reporting conversion rate improvements of 18% to 31% for Buy with Prime-eligible products compared to standard checkout, depending on the percentage of their site traffic that is already Prime-authenticated.
“The math stopped being complicated somewhere around Q3 last year. If 40% or more of your site visitors are Prime members — and in categories like supplements or kitchen, that number is often higher — the conversion uplift more than covers the fees Amazon takes. It’s essentially renting trust.”
— Carly Dempsey, VP of Growth, Brainchild Commerce Agency, Austin
Amazon charges merchants a blended fee that includes payment processing (approximately 3.5%), fulfillment through FBA, and a per-transaction service charge. For most merchants, the all-in cost lands between 8% and 12% of GMV, depending on product weight and category — figures that are roughly comparable to, or slightly above, Shopify Payments plus a mid-tier 3PL arrangement.
How Are Shopify and Other Platform Players Responding to the Encroachment?
Shopify has not been silent. The company’s Shop Pay continues to outperform on raw conversion metrics — internal Shopify data cited in its Q1 2026 earnings call showed Shop Pay achieving an average checkout-to-purchase rate of 72% versus 57% for non-accelerated checkout on the same storefronts. But Buy with Prime’s advantage is not speed or UX; it is the Prime badge itself and the trust signal it carries with a specific consumer segment.
Multiple agency operators told Ecommerce Times that Shopify has been quietly encouraging its enterprise accounts to lean into Shop Pay Installments and its expanding Shop Cash loyalty program as differentiated reasons to drive checkout through native Shopify infrastructure rather than ceding that transaction to Amazon’s rails.
“Shopify isn’t panicking, but they’re watching this very carefully. Every Buy with Prime transaction is a transaction that doesn’t flow through Shop Pay, doesn’t build Shop Cash loyalty history, and doesn’t enrich Shopify’s first-party data layer. At 50 million transactions, that’s not noise anymore.”
— Marcus Tillman, Partner, Meridian Commerce Partners, New York
WooCommerce merchants present a different picture. Because WooCommerce lacks a native accelerated checkout equivalent to Shop Pay, Buy with Prime has found arguably more fertile ground among WordPress-hosted DTC brands that previously relied on Stripe plus manual fulfillment arrangements. Amazon’s WooCommerce plugin now has over 28,000 active installs, according to the WordPress plugin repository as of May 2026.
What Does the 50M Transaction Milestone Mean for Third-Party Logistics Providers?
For 3PLs, Buy with Prime’s growth is a structural threat. The program mandates fulfillment through Amazon FBA — merchants must have inventory in FBA to be eligible — which means every Buy with Prime transaction is a transaction a ShipBob, ShipMonk, or Fulfillment by Merchant operation cannot fulfill. As program adoption scales, some DTC brands are splitting inventory: sending 30% to 50% of their SKU catalog to FBA specifically to enable Buy with Prime coverage while retaining their 3PL for remaining volume.
- ShipBob has publicly acknowledged the inventory split dynamic and is positioning its Merchant Plus network as a hybrid fulfillment layer for brands that want Buy with Prime eligibility without fully committing to FBA.
- Deliverr (now operating under Shopify Logistics) is exploring whether its fulfillment nodes can eventually power an alternative to FBA-dependent off-platform checkout programs, though no formal announcement has been made.
- Amazon Multi-Channel Fulfillment (MCF) — the service that allows FBA inventory to fulfill non-Amazon orders — is being cross-sold aggressively to Buy with Prime merchants as an all-in fulfillment solution, creating additional competitive pressure on independent 3PLs.
Brandon Chu, COO of a mid-sized home goods brand doing approximately $28M annually on a mix of Amazon and DTC Shopify, described the inventory decision as one of the more consequential operational choices his team has made in 2026.
“We moved about 35% of our SKU depth into FBA six months ago specifically for Buy with Prime. Our DTC conversion rate on those SKUs went up 22 points. But we’re now paying FBA storage fees on volume that used to sit in our 3PL at lower cost. The unit economics are better net of conversion — but only because our Prime-authenticated traffic is above 50%. Brands with lower Prime traffic exposure should run the numbers carefully before committing.”
— Brandon Chu, COO, Terranova Home Goods
Is Buy with Prime Cannibalizing Amazon Marketplace Sales or Growing the Pie?
This is the question Amazon’s internal teams are most eager to answer definitively — and the honest answer, based on merchant-reported data and analyst modeling, is: it depends heavily on the brand’s existing Amazon presence.
For brands that are not currently on Amazon Marketplace at all, Buy with Prime is functioning as a pure conversion tool with no cannibalization dynamic. For brands with significant Amazon Marketplace revenue, the picture is more complex. Some merchants report that customers who previously discovered them on Amazon and then sought out their DTC site are now completing that DTC purchase via Buy with Prime — a checkout path that previously would have bounced back to Amazon.com.
Analysts at Marketplace Pulse, who have been tracking Buy with Prime adoption since the program’s beta in 2022, estimate that approximately 62% of Buy with Prime transactions are from Prime members who had not previously purchased from that specific brand on Amazon Marketplace. That figure — if accurate — suggests the program is primarily a customer acquisition and conversion tool for DTC channels rather than a cannibalization mechanism.
- Average order value on Buy with Prime transactions is reportedly 14% higher than the same brand’s standard DTC checkout, attributed to Prime members’ documented tendency toward larger basket sizes.
- Return rates on Buy with Prime orders are running at 11.3% on average, according to merchant data aggregated by agency Brainchild Commerce — slightly above the industry DTC average of 9.8% but well below Amazon Marketplace return rates in most categories.
- Customer email capture remains a friction point: Amazon does not pass shopper email addresses to merchants by default, though merchants can now prompt for optional email opt-in at the post-purchase confirmation screen through a feature launched in February 2026.
What Are the Regulatory and Data Concerns Merchants Should Be Watching?
The Federal Trade Commission signaled in a March 2026 advisory memo that it is monitoring Buy with Prime’s data practices, specifically around how Amazon uses aggregate transaction data from off-Amazon purchases to inform its own marketplace pricing, advertising, and product development decisions. No formal enforcement action has been initiated, but merchant advocacy groups including the Connected Commerce Council have submitted comments urging the FTC to require clearer disclosure from Amazon about how DTC merchant transaction data is used internally.
For European merchants, the situation is more acute. The EU’s Digital Markets Act, enforced since late 2024, includes provisions that could affect how a gatekeeper like Amazon uses data from third-party merchant transactions facilitated through its own checkout infrastructure. Amazon has not publicly addressed DMA compliance in the context of Buy with Prime’s European rollout, which is currently limited to the UK, Germany, and France.
“Any brand running Buy with Prime should understand clearly that Amazon sees every transaction, every SKU velocity signal, every conversion rate data point. That competitive intelligence flows somewhere. Merchants who are in categories where Amazon has private label ambitions should be especially thoughtful.”
— Laura Pietsch, ecommerce regulatory counsel, Pietsch & Greer LLP, Washington D.C.
What Should DTC Operators Actually Do With This Information Right Now?
For DTC operators evaluating Buy with Prime in mid-2026, the practitioner consensus forming in agency and operator communities points toward a conditional adoption framework rather than a blanket yes or no.
- Run a Prime traffic audit using your analytics stack. If Prime-authenticated sessions — identifiable through Amazon Attribution tags and browser signal modeling — represent less than 30% of your DTC traffic, the conversion math is unlikely to pencil out after fees.
- Model the FBA inventory split cost before committing. Use Amazon’s FBA revenue calculator against your actual 3PL unit costs, factoring in the conversion lift only at your real Prime traffic percentage.
- Negotiate email opt-in placement. Amazon’s February 2026 post-purchase opt-in feature is not enabled by default — merchants must activate it in their Buy with Prime dashboard and A/B test placement to maximize capture rates.
- Monitor SKU-level cannibalization for 90 days post-launch if you have an active Amazon Marketplace presence on the same ASINs.
- Consult legal counsel on data usage terms if you operate in the EU or are in a category where Amazon has demonstrated private label activity.
At 50 million transactions and accelerating, Buy with Prime has moved from experimental to infrastructural. The question for DTC operators is no longer whether to pay attention — it’s whether the program’s conversion benefits outweigh its strategic costs for their specific business model.
