Amazon vs Costco: which does AI recommend?

· ChatGPT Search and Google AI Mode

Based on every AI answer that names bothReviewed by

How we measure

AmazonCostco

Listed first when AI names both

Amazon: 51% (Amazon leads)
Costco: 49%

Recommended when named

Amazon: 74% (Amazon leads)
Costco: 69%

Topic by topic

Mentioned in, as a share of each topic’s answers

Level: Cast-iron Dutch ovens, Whole-house water softeners, Mattress sales and financing, Hydration packets, Outdoor kitchen cabinets, Over-the-counter hearing aids, Fruit basket delivery, Heavy equipment operator training, Men's jeans, Bluetooth app-adjustable hearing aids, Home air purifiers, Astronomy telescopes, Golf apparel shopping and Men's hoodies

What people ask AI about Amazon and Costco

Amazon listed firstCostco listed first
  1. What is the best set of velvet hangers?Amazon usually first
  2. Where can I buy a car battery online?Costco usually first

Who AI mentions first

Amazon listed firstCostco listed first

JunAmazon listed first: 55%Costco listed first: 45%

JulAmazon listed first: 49%Costco listed first: 51%

AugAmazon listed first: 48%Costco listed first: 52%

SepAmazon listed first: 58%Costco listed first: 42%

Google AI ModeAmazon listed first: 52%Costco listed first: 48%

ChatGPT SearchAmazon listed first: 50%Costco listed first: 50%

Sources cited in the comparisons

  • The bar’s length is this source’s share of the comparison’s claims; its parts show which brand those claims favour.

  • The bar’s length is this source’s share of the comparison’s claims; its parts show which brand those claims favour.

  • The bar’s length is this source’s share of the comparison’s claims; its parts show which brand those claims favour.

  • The bar’s length is this source’s share of the comparison’s claims; its parts show which brand those claims favour.

  • The bar’s length is this source’s share of the comparison’s claims; its parts show which brand those claims favour.

  • The bar’s length is this source’s share of the comparison’s claims; its parts show which brand those claims favour.

  • The bar’s length is this source’s share of the comparison’s claims; its parts show which brand those claims favour.

  • The bar’s length is this source’s share of the comparison’s claims; its parts show which brand those claims favour.

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