If you're deciding where to spend your limited AEO hours this quarter, the free tier is where most of the shopping traffic actually happens. ChatGPT, Perplexity, Gemini and Microsoft Copilot all let anyone ask "what's the best running shoe under $150" without paying a cent, and that free layer is where most shoppers form their first impression of your brand. Paid tiers add faster models and higher usage caps, but the shopping recommendation logic, the part that decides whether your product shows up at all, runs largely the same on free accounts.
This isn't a buying guide for consumers picking a chatbot. It's a prioritization call for brands and agencies with finite content and feed-optimization budgets. Which free AI shopping surface should you optimize for first, and why does the free tier matter more than the premium one for reach?
Why the free tier is the one that matters for reach
Here's the uncomfortable math for anyone assuming premium subscribers are the target audience. First Page Sage's July 2026 chatbot market share report puts ChatGPT at 51.3% of US chatbot usage, Gemini at 27.7%, Claude at 10.3%, Perplexity at 2.0% and Microsoft Copilot at 1.3%. Most of those users, across every platform, are on the free plan. OpenAI doesn't publish a clean free-vs-paid split, but ChatGPT crossed 1 billion weekly active users in August 2026, and ChatGPT Plus subscriber counts have never been reported anywhere near that scale. The free tier is the mass market. Optimizing only for paid-tier features (Perplexity Pro's expanded model access, ChatGPT Pro's higher usage caps) means ignoring the audience that's actually doing the browsing.
I think the instinct to chase the newest agentic checkout feature is understandable but backwards for most brands. Checkout features change fast (OpenAI rolled out Instant Checkout in February 2026 and had already pulled back from it by March, pivoting toward product discovery instead). Discovery and recommendation logic is the more stable thing to build content and feed infrastructure around, and it's available to free users on every platform in this comparison.
The comparison table
| Platform | Free tier shopping access | Core shopping feature | Feed/data source | Checkout on free tier | Best for |
|---|---|---|---|---|---|
| ChatGPT (free) | Full access to product search and recommendations | Product cards with price, reviews, retailer links inside chat | Merchant product feeds submitted via OpenAI's commerce APIs, plus web content | Product discovery only; checkout has been rolled back to merchant sites as of March 2026 | Broad reach, highest overall usage share |
| Perplexity (free) | Full access to product search with cited sources | Sourced product comparisons and shopping results inline with citations | Live web crawl plus retailer data partnerships | No native "Buy with Pro" on the free tier; that sits behind Pro | Comparison-style, research-heavy queries |
| Gemini (free) | Full access to Gemini app shopping via Google's Shopping Graph | Product images, reviews, prices, inventory and buy links generated from natural-language prompts | Google's Shopping Graph, described by Google as roughly 50 billion products with about 2 billion updated hourly | Some agentic checkout piloted for logged-in users, still expanding through 2026 | Brands already running solid Google Merchant Center feeds |
| Microsoft Copilot (free) | Free tier includes price tracking, comparison and personalized picks in Edge and the Copilot app | Price comparison, price tracking, and the new Copilot Checkout for direct in-chat purchases | Merchant integrations plus Stripe, PayPal and Shopify for payment processing | Yes, Copilot Checkout is rolling out on the free tier in the US | Brands with a strong Edge/Bing shopping feed already in place |
| Claude (free) | No dedicated shopping surface | General conversational answers about products, no product cards or shopping UI | None dedicated to commerce | No | Not a shopping-visibility priority right now |
A quick note on that last row. Claude doesn't have a shopping-specific interface the way the other four do, and Anthropic hasn't signaled it's building one. That doesn't mean Claude visibility is worthless (it still shows up in comparison and recommendation-style prompts), but if you're specifically optimizing for a shopping assistant, it's not where your effort goes first.
ChatGPT: highest reach, discovery over checkout right now
ChatGPT's free tier gives every user product cards inside a conversation, pulling from merchant feeds submitted through OpenAI's developer platform alongside general web content. The interesting wrinkle is the checkout story. OpenAI launched "Buy it in ChatGPT" in February 2026 to bring Instant Checkout to all US free users, working through Etsy sellers via Stripe with Shopify support planned. Then, per reporting from Hypotenuse AI, OpenAI backed off Instant Checkout by March 2026 and repositioned the product around discovery, routing shoppers to merchant apps and storefronts like Walmart's in-ChatGPT integration rather than handling the transaction itself.
What that means practically: don't build your ChatGPT shopping strategy around checkout mechanics. Build it around getting your product feed correctly ingested and your product pages structured so ChatGPT's discovery layer can cite you accurately. We covered the mechanics of that in ChatGPT Shopping: How It Works and How to Get Your Products Cited, and the checkout history specifically in ChatGPT Instant Checkout Explained.
Perplexity: free tier is a citation machine, not a checkout tool
Perplexity's whole pitch is answers with sources attached, and that carries over into shopping queries. Ask a free Perplexity account to compare three espresso machines and you get a synthesized answer with inline citations back to review sites, retailer pages and spec sheets. That's valuable for brand visibility because every citation is a potential click, and Perplexity doesn't gate that citation behavior behind a paywall.
Where the free tier stops short is checkout. Perplexity's more transactional buying features live behind Pro, which runs $20/month based on the pricing tiers most third-party trackers report in 2026 (Perplexity doesn't always publish granular changelog detail on which specific features sit where, so treat exact feature-gating as something to verify directly with Perplexity if it's central to your strategy). For a free-tier optimization play, focus on being the cited source, not the checkout partner. That means clean, well-structured product and comparison content that a retrieval system can quote confidently.
Gemini: the sleeper pick given its shopping graph advantage
Gemini's free-tier shopping experience got a real upgrade in 2026. Google rolled shopping into the Gemini app, AI Mode and Circle to Search, letting users brainstorm outfits or browse gift ideas in a single chat and get back product images, reviews, pricing and inventory pulled straight from Google's Shopping Graph. That's not a small side project. Google describes the Shopping Graph as tracking roughly 50 billion products, with about 2 billion refreshed hourly.
Here's why I'd tell most ecommerce brands to prioritize this one if they haven't already: if you're already running a Google Merchant Center feed for standard Shopping ads, you likely have most of the infrastructure Gemini needs. The marginal cost of showing up well in Gemini's free shopping answers is lower than building a brand-new feed pipeline for a platform you're not already on. Combine that with Gemini's climbing usage share (27.7% per First Page Sage, more than 10x Perplexity's share) and it's a stronger reach-per-effort bet than it looks at first glance.
Microsoft Copilot: smallest market share, most aggressive checkout play
Copilot sits at only 1.3% of chatbot market share per First Page Sage's July 2026 numbers, which is why it's easy to overlook. But Microsoft is moving faster than its usage share suggests. Copilot Checkout lets free-tier users complete a purchase inside the chat window itself, without bouncing to an external site, using Stripe, PayPal and Shopify to process payment. That's further along than what ChatGPT currently offers on the free tier after the Instant Checkout pullback.
If your customer base skews toward Windows and Edge users (B2B software, enterprise hardware, certain retail categories), Copilot's tight integration with Edge's built-in price tracking and comparison tools is worth a look even at its current scale. For most consumer brands, though, I'd rank this fourth on the priority list purely on reach math. Small market share means a smaller addressable audience no matter how good the checkout experience is.
Claude: not a shopping priority, but not irrelevant either
Claude doesn't have a shopping mode, product cards, or a Shopping Graph equivalent. If someone asks Claude for a product recommendation, they get a conversational answer without the visual merchandising layer the other four platforms have built. That's a deliberate product choice from Anthropic, not a gap they're rushing to close as far as public roadmap signals show.
For brand visibility purposes, this means Claude belongs lower in your shopping-specific priority stack. It still matters for general brand-mention tracking (we cover how to track that kind of visibility across platforms in How to Measure AI Visibility), just not for product-feed or shopping-schema investment.
How to prioritize your optimization budget
Given all of that, here's the order I'd actually spend a limited AEO budget in, ranked by reach times feasibility rather than by hype:
- Gemini first, if you already run a Google Merchant feed. The infrastructure overlap with existing Shopping ads work makes this the lowest lift for real reach, and its market share is growing fastest among the group.
- ChatGPT second, for discovery not checkout. Highest raw usage share by a wide margin, but build for citation accuracy and feed correctness rather than checkout flows that OpenAI itself has been iterating on quickly.
- Perplexity third, for comparison-heavy categories. If your product competes on specs or reviews (electronics, appliances, software), Perplexity's citation-first format rewards clear, well-sourced comparison content.
- Copilot fourth, if your audience is Windows-heavy. Smaller reach overall, but the most mature in-chat checkout experience on a free tier right now.
- Claude last, monitored not optimized. Track brand mentions for awareness, don't build dedicated shopping-feed infrastructure around it yet.
None of this is static. Feature availability on these free tiers has shifted multiple times within a single year already (ChatGPT's checkout reversal is the clearest example), so treat this as a snapshot to revisit quarterly rather than a permanent roadmap. If you want a structured way to see which of your specific products actually surface across ChatGPT, Perplexity and Gemini today, that's exactly the kind of tracking AI Peekaboo is built for. Our ChatGPT visibility tracking and Gemini tracking coverage go deeper into the mechanics if you want to set up monitoring before committing budget to any one platform.
Common questions on free-tier AI shopping visibility
Do I need a paid feed submission to show up in ChatGPT's free-tier shopping results?
No. Product feed submission to OpenAI's commerce APIs is a merchant-side integration, not something tied to whether the shopper on the other end is paying for ChatGPT Plus. Once your feed is ingested, it can surface for any ChatGPT user, free or paid.
Does Gemini's free tier show the same product data as AI Mode or Google Shopping proper?
Largely yes. Gemini's shopping feature and Google's AI Mode both draw from the same Shopping Graph, so a feed that's structured well for one tends to perform well across both. The interface differs (conversational chat versus a search results layout) but the underlying product data pipeline is shared.
Is it worth building separate content for Perplexity if it only has 2% market share?
It depends on your category. Perplexity's share is small in aggregate, but its user base skews toward research-heavy, comparison-driven queries, exactly the kind of searches that precede a considered purchase. An appliance or software brand might get disproportionate value from a small but high-intent audience there, even if a fast-fashion brand wouldn't.
Should I deprioritize Claude entirely?
Not entirely. Claude still gets used for general research and recommendation conversations, and being mentioned favorably there matters for brand perception even without a shopping UI. Just don't spend feed-optimization budget on a platform that has no feed to submit to.
How often should I re-check this comparison?
Quarterly at minimum. ChatGPT rolled out and then rolled back Instant Checkout within about six weeks in early 2026, which is a good reminder that free-tier shopping features on any of these platforms can change faster than a typical content calendar.
Want a second opinion on which of these platforms deserves your next quarter's content budget? Email filipe@aipeekaboo.com or book 30 minutes and we'll walk through your specific product catalog against this comparison.
