#10
of 23 stores measured
The index › the United States › Zero waste › Costco
Costco in the Krillo Index
When shoppers in the United States ask ChatGPT and Gemini where to buy zero waste, is Costco named? This is the answer from our latest monthly measurement, November 2026.
3/35
buying questions where AI names it; the category median is 2
1
questions where AI recommends it outright
Measured with ChatGPT and Gemini, the same questions for every store in this category, asked in the language of the market. Read how we measure.
Around Costco
See the full ranking for Zero wasteWhat AI says about Costco
In the 3 answers that name Costco, AI mentions: sustainable (1x), low prices (1x), wide range (1x), quality (1x).
“Costco/Sam’s Club online, Best for lower per-unit cost on things you use consistently, such as concentrated laundry detergent, recycled paper products, and bulk soap—provided you have storage and will finish them.”
ChatGPT, asked: Where can I buy eco-friendly household products online in the US without spending a lot?
“Why it’s high value: Think of Thrive Market as an online, sustainable Costco.”
Gemini, asked: Which American webshop gives you the most value for your money on sustainable products?
“For durable glass containers: Pyrex or Snapware sale sets from Costco, Target, or Amazon.”
ChatGPT, asked: Where can I buy cheap but good quality reusable bags and containers online in America?
Quoted word for word from the answers in our measurement. What AI says about your store decides which buying questions it names you for.
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