Three AI advertising surfaces now matter for Shopify brands in 2026: ChatGPT Ads, Perplexity Ads, and Google AI Overviews placements. They share a category (AI-native advertising) but they are structurally different products with different audiences, bid mechanics, and creative requirements. This piece compares them on the dimensions that matter for ecommerce.
Audience size and overlap
ChatGPT has roughly 600 million weekly conversational queries from ecommerce-relevant users. Perplexity has roughly 80 million weekly queries, with a notably more research-heavy and B2B-leaning user base. Google AI Overviews appear on roughly 18 percent of Google search results pages as of mid-2026, which translates to several hundred million eligible commercial impressions per day.
The audience overlap is real but not total. ChatGPT users skew slightly younger and more general-purpose. Perplexity users skew toward research, professional, and technical use cases. Google AI Overviews capture the broadest audience because they appear inside a Google search experience users are already in. For ecommerce brands, Google AI Overviews and ChatGPT Ads are the two with the most commercial relevance; Perplexity is a niche channel that fits some categories well and others poorly.
Bidding and pricing
ChatGPT Ads use cost-per-engagement (CPE) at $0.40 to $1.20 floor in most categories. Perplexity Ads use a hybrid CPM plus CPC model where impressions cost a baseline and clicks layer in additional spend at $0.60 to $2.20 typically. Google AI Overviews use the existing Google Ads auction infrastructure (Performance Max bid strategies, Search bid strategies) but with a separate ad slot inside the AI Overview unit, typically commanding a 15 to 30 percent CPC premium over standard Google Search ads in the same category.
For raw cost efficiency, ChatGPT Ads currently win in most ecommerce categories. Perplexity is more expensive per outcome but offers a uniquely qualified audience for B2B and considered-purchase categories. Google AI Overviews are most expensive per click but capture the highest commercial-intent audience because users are already in a search funnel.
Creative format differences
ChatGPT Ads creative is conversational: merchant description, square hero image, no headlines. Perplexity Ads creative is more traditional: headlines, descriptions, and visual assets that look closer to a Google text ad styled for an answer page. Google AI Overviews ads use existing Google Ads creative formats (responsive search ads, shopping feed) without additional creative work, which is operationally the easiest of the three.
The creative implication is that Google AI Overviews is the lowest-effort to start (your existing Google Ads creative works), Perplexity is moderate (some new copy needed but familiar format), and ChatGPT Ads requires the most fresh creative thinking (the conversational format is new).
Conversion patterns
Beta cohort data across the three platforms shows distinct patterns. ChatGPT Ads engagement-to-conversion: 4 to 9 percent in ecommerce. Perplexity click-to-conversion: 5 to 11 percent because the audience is research-oriented and high-intent. Google AI Overviews click-to-conversion: 3 to 6 percent, slightly better than standard Google Shopping but lower than the other two AI surfaces because the audience is broader.
Time-to-conversion varies too. Google AI Overviews convert fastest (1 to 4 days typically) because users are deep in a search session. ChatGPT Ads convert slower (5 to 15 days) because placements appear earlier in consideration. Perplexity sits in the middle (3 to 10 days) because research-mode users often need time to evaluate.
Which to prioritize
For most Shopify brands, the right priority order in 2026 is:
- Google AI Overviews first. If you already run Google Ads, you are already eligible. The integration is automatic with your existing Performance Max and Search campaigns. Set up takes minutes. Audience scale is unmatched in this category.
- ChatGPT Ads second. The native Shopify feed integration removes most operational friction. The conversion lift over Google Shopping is real and the creative format rewards thoughtful merchant writing. Allocate 5 to 12 percent of paid budget here for most stores.
- Perplexity Ads third. Only worth the operational lift if your product category has clear research-mode buyer behavior: B2B SaaS, technical products, considered-purchase categories with long evaluation cycles. Skip if you sell impulse-buy consumer goods.
Our team at ScaleWise VA can scope which AI ad surfaces fit your store and at what allocation. If you want a specific recommendation, book a free 30-minute discovery call and we will look at your category and current paid mix.