US B2B ecommerce continues to expand as it becomes a default buying channel. But slower growth, operational gaps, and marketplace momentum are reshaping where value is created and how sellers compete.

Growing consumer adoption of AI tools is positioning AI platforms as an alternative shopping channel—but most AI-driven transactions are still completed on retailer websites.

A 4% fee puts pressure on merchants and could shift momentum to rivals like Google and Microsoft.

Sluggish fixed point-of-sale (POS) terminal sales are forcing providers to rethink their strategies. From adding softPOS capabilities to adding AI tools and vertical-specific offerings, POS software is becoming the real competitive battleground.

As consumers grow more comfortable with using AI, retail industry leaders see 2026 as a pivotal year in shaping how the emerging technology disrupts the way people shop.

Affirm expanded its partnership with Shopify, bringing Shop Pay installments to the UK, per a press release. PayPal and Klarna’s deep entrenchment in the UK will make it difficult for other BNPL contenders to make advances. Powering Shop Pay installments could help Affirm accelerate its foray into the country thanks to Shopify’s established network of merchants and brand recognition.

In 2026, stablecoins, agentic commerce, and AI-driven rewards will reshape the payments industry. Providers need to bet early or risk being sidelined by faster, cheaper, and more intuitive payment experiences.

In earnings calls from retail leaders, one of the biggest shared signals is that AI shopping assistants are becoming the new front door of the customer journey. Whether the retailer is in grocery, fashion, or general merchandise, conversational search is now the organizing principle for discovery.

As retail media moves from side business to centerpiece, big brands are prioritizing measurement and efficiency to cement the channel as a mature budget item. Retail media will grow almost 20% this year (19.4%) to reach $58.79 billion, according to EMARKETER's September 2025 forecast. In recent earnings calls, tech leaders described a channel that is now about solid data, AI-driven relevance, and reshaping how advertisers reach shoppers.

Future-proofing against—and capitalizing on—advances in consumer-facing AI will be the overarching theme for retailers in 2026.

OpenAI’s push into commerce took a major step forward with the launch of in-app shopping on ChatGPT, though it will take time to gain traction as a meaningful retail sales channel.

Now that consumers can make direct purchases within ChatGPT, marketers and retailers must reimagine the customer journey once again.

AI shopping assistants are boosting discovery and personalization, but trust issues and fulfillment challenges could limit their impact on channel migration.

Amazon used its annual seller conference, Amazon Accelerate, to unveil new tools and fulfillment capabilities that underscore its ambition to serve as the infrastructure of retail. The retailer is weaving together AI-driven tools, externalized logistics, and its vast seller network to extend its influence beyond its own marketplace. As Amazon extends its reach through MCF and Buy with Prime, it increasingly sees merchants and marketplaces not as rivals but as collaborators.

The situation: Amazon and Google, once bound by a symbiotic relationship in which Amazon funneled ad dollars into Google Search and Google indexed Amazon’s pages, are now veering toward open conflict as generative AI (genAI) blurs the lines between ecommerce, advertising, and search. Both companies are determined to own the entire journey from discovery to checkout, and that ambition is unraveling what remains of their former détente. Our take: Amazon and Google are racing to define where and how consumers discover and buy products in the genAI era. If Amazon succeeds in walling off its marketplace data and steering shoppers to its own AI interfaces, the retail landscape could splinter into walled gardens where tech giants cooperate far less. That winner‑takes‑all dynamic might suit the victors, but it risks degrading the overall consumer experience with fewer choices and less transparent pricing. At the same time, it could lead brands and retailers into a margin‑sapping race to the bottom inside whichever closed ecosystem proves most dominant.

Payment processing solutions from major US digital commerce platforms are maturing and capturing a greater share of their retail ecommerce sales. Here’s how five platforms are approaching the payment facilitator (payfac) model to catapult their growth.

The news: Shopify will not allow agents and other bots to purchase on users’ behalf without “final human review,” the company said in an update to the code used by merchants to operate their online storefronts. Our take: While AI agents aren’t yet reliable enough to be given free reign over purchase decisions, companies have to be prepared for a future where they soon will be.

The news: Sovos will automate Shopify’s sales tax returns process for merchants. Our take: Reclaiming time and reducing risk for merchants helps position Shopify as a stronger commerce platform and partner.

The news: Shopify partnered with Coinbase and Stripe so customers can pay with the USDC stablecoin at checkout. Our take: Coinbase is the biggest winner in this partnership. Cryptocurrency needs to gain traction with a wide merchant network to accelerate its use, and Shopify represents a huge score for Base.

Tariff uncertainty, billion-dollar merger and acquisition deals, and a jump in social commerce will create new dynamics in the payments industry in H2 2025. Burgeoning tech like agentic AI and stablecoins will further shake up the space.