Key Takeaways
- Market growth: AI-driven platforms will account for 1.5% of US retail e-commerce sales in 2026, reaching $20.57 billion in value, nearly quadrupling from 2025.
- Technology and key players: Amazon, Google, OpenAI, and Shopify are all building autonomous purchasing systems; the Visa and OpenAI partnership embeds payments directly into ChatGPT.
- The trust-adoption gap: 74% of consumers say they'd trust an AI agent more than a friend when it comes to shopping, yet only 9% would accept fully autonomous purchases.
A New Kind of Customer Walks Into Online Stores
AI agents have started searching, comparing, and buying products independently on behalf of users. This phenomenon, known as Agentic Commerce, is rewriting the traditional search-compare-checkout sequence, replacing it with a single delegation to an automated system.
The model splits into two operational variants. In the conversational version, users interact with the agent to narrow down options while retaining final control over the purchase decision. In the autonomous version, users simply set a goal and constraints, while the agent executes the transaction and returns only a confirmation.
How Big Is This, Really?
According to EMARKETER, sales generated through AI platforms in the US will hit $20.57 billion in 2026, representing 1.5% of total retail e-commerce, a nearly fourfold jump from the previous year. McKinsey pegs the global opportunity for the sector between $3 and $5 trillion by 2030.
Consumer adoption is keeping pace. 63% of European shoppers already use AI to compare product options, while 45% of consumers worldwide use it at some point during their purchase journey. Retailers who have integrated AI capabilities are seeing sales growth of 14.2%, compared to just 6.9% for those who haven't.
Big Tech's Next Move
Amazon has equipped its Rufus assistant with an "Auto Buy" feature that completes purchases automatically once user-set price thresholds are met. Google is building a universal cart in partnership with grocery chain Kroger, while OpenAI has opened up ChatGPT to purchases through third-party apps, striking a deal with Visa to integrate payments.
The Visa-OpenAI partnership lets agents complete transactions with any merchant that accepts the Visa payment network, eliminating the manual checkout step entirely. Shopify, for its part, is rebuilding its infrastructure so that AI agents become the primary point of access for sellers on the platform.
Consumer Trust vs. Consumer Resistance
Data on user attitudes paints a contradictory picture. 74% of consumers say they trust an AI agent more than their own best friend when it comes to shopping, and 47% would be willing to delegate repetitive tasks like the weekly grocery run.
Full autonomy, however, remains a tough psychological barrier: only 9% of respondents would accept fully automated purchases, and just 14% of American shoppers trust AI to handle orders without supervision. One Google executive compared the situation to "giving a teenager their first debit card—there need to be limits and guardrails."
Technical and Operational Roadblocks
The system still has structural knots to untangle. Product catalogs need machine-readable formats, updated in real time, for agents to operate without errors. Liability questions in cases of mistaken purchases remain unresolved, and there's still no shared protocol for handling fraud and returns.
On the technical side, agents still routinely run into CAPTCHA blocks and other security mechanisms designed to tell human users apart from automated systems.
What's Next for Brands
For companies, the operational direction converges on one point: making their data machine-readable and optimizing content for interaction with AI agents. The competitive edge, according to analysts, will go to whoever first adapts their systems to a buyer that's no longer a person—but an algorithm that decides and executes.
