Amazon blocks Meta’s Muse but Shopify opens the door

Most people have sent a friend to pick up an order. The store rarely cares who walks in, as long as the bill clears.

Online retail just split over whether software gets the same courtesy. Amazon.com Inc. (AMZN) began blocking the Muse AI agent from Meta Platforms Inc. (META) on Sunday night, Sept. 20, 2026, according to Bloomberg.

A day later, Shopify Inc. (SHOP) said it would open every store on its platform to the same agent.

Shopify CEO Tobi Lütke said Muse will pay through Shop Pay, the company’s one-tap checkout tool. He called it “an easy and delightful way to shop and check out with Muse,” according to Seeking Alpha.

Muse launched on Sept. 8, 2026, to handle errands such as shopping and scheduling, according to the Associated Press. It quickly hit No. 1 among free apps, so every closed door matters.

Unlike traditional search, Muse functions as an autonomous agent that navigates digital storefronts, selects items, and completes transactions on users’ behalf without requiring them to visit the merchant’s site directly.

Investors preferred the open door. Shopify shares closed up 7.3% at $137.92 on Monday, Sept. 21, 2026, according to TipRanks. They rose nearly 8% more the next day, Investopedia noted.

Amazon wants consent it did not always ask for

Amazon’s case rests on permission. A spokesperson said shopping agents should “operate openly and respect service provider decisions about whether or not to participate,” Axios reported. Meta had declined Amazon’s request to remove the bot, according to Bloomberg.

The consent argument has a history.

In January 2026, more than 180 sellers on Shopify and rival platforms said Amazon’s Buy for Me agent listed their goods without consent, CNBC noted.

Amazon told CNBC that businesses could opt out by email. That is the opposite of the ask-first rule it now wants from Meta.

More importantly, Amazon earned more than $68 billion from ads in 2025, according to GeekWire, and that business relies on shoppers scrolling past paid placements.

An agent that jumps straight to checkout skips those ads, a risk Fortune flagged.

Muse is not Amazon’s first target:

• Shopping agents, including OpenAI’s ChatGPT, Gemini from Alphabet, and Perplexity’s Comet, are also blocked from Amazon’s store, according to Seeking Alpha.
• An appeals court ruled on Aug. 4, 2026, that under federal hacking law, Comet users, not Perplexity, accessed Amazon, Reuters confirmed. That lifted an injunction Amazon had won in March.

Shopify wants to own the checkout, not the storefront

Shopify’s logic runs the other way. It does not need shoppers on merchant websites if payments still run through its rails.

Shop Pay passed $400 billion in lifetime accelerated gross merchandise volume in June 2026, PYMNTS said, so many shoppers already have details saved.

Related: Amazon fires a warning shot at Prime members

Some of the same merchants Amazon’s agent listed without asking now have a path to Muse through Shopify’s own integration.

Deutsche Bank called the deal “strategically important” because leading AI platforms keep building on Shopify’s infrastructure, according to Investopedia.

Shopify stock still trades well below its high

Wall Street is rewarding Shopify’s open-door stance because its financial engine relies on transaction volume rather than ad impressions. With second-quarter revenue up 34% and an 18% free cash flow margin, the company’s core software and payment tools are expanding without burning cash.

Shares had fallen about 21% in 2026 as investors feared AI would erode software companies, according to CNBC.

Bernstein started coverage at outperform with a $160 target, placing Shopify “at the center of tech’s Venn Diagram spanning eCommerce, software and payments,” CNBC reported.

Shares traded between $94.00 and $182.19 over the past 52 weeks. Even after this week’s rally, the stock is down nearly 10% for 2026 but more than 50% above its May low, according to Investopedia. The rebound is real, but incomplete.

Analysts tracked by TipRanks give the stock a Strong Buy consensus, with 28 Buy and four Hold ratings over the past three months. Still, neither company has disclosed financial terms. The rally is pricing a channel that has not yet produced revenue.

More Retail:

• Home Depot is making a big bet on cautious consumers
• Another state just banned a controversial retail pricing practice
• JPMorgan just flagged a slow-build food crisis

The real contest is over who grants permission

For two decades, online retail rewarded whoever owned the page a shopper landed on. Amazon is betting its selection is too valuable for agents to skip.

Shopify is betting agents will route around any wall toward merchants who welcome them.

Amazon’s largest rivals are building for the open path. Walmart Inc. (WMT) and Target Corp. (TGT) helped Google and Shopify build the Universal Commerce Protocol, an open standard for agent checkout, according to Internet Retailing.

Muse turns that split into a consumer test. If users leave the agent to shop Amazon directly, the wall works. If they stay and buy elsewhere, Amazon’s store becomes a door fewer shoppers bother to knock on.

Either way, the next retail moat will be measured in permissions, not page views.

Related: Amazon makes $1.5 billion move for U.S. workers