A public index of which products ChatGPT and Perplexity recommend when shoppers ask buying questions — measured weekly, published with the method.
All figures measured.
| # | Product | ChatGPT | Perplexity |
|---|---|---|---|
| 1 | Omnisend | 55% | 58%† |
| 2 | Klaviyo | 46% | 53%† |
| 3 | Brevo | 36% | 32%† |
| 4 | Mailchimp | 34% | 33%† |
| 5 | MailerLite | 32% | 33%† |
Ranked by cross-engine Pick Rate, which pools both engines' samples. Each column is one engine's own figure.
† Corrected 12 October 2026: incomplete_round. Some of this round's samples had failed when it was first published. They were collected afterwards with the same questions and settings, and the figures marked † were recomputed. How corrections work
Scanned 12 October 2026. 203 samples across ChatGPT and Perplexity, round 9. Methodology v2026-09-29.1.
26 question pages and 77 product pages, all free.
Which products moved, which engine changed its mind, and what we got wrong. Affiliate links and sponsors never influence our data or rankings.
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Perplexity and ChatGPT were asked the same 20 shopping questions. They named 66 brands between them and agreed on 15 — an overlap of 0.19. On the four questions that named brands themselves, agreement was total; on the open-ended ones it was close to zero.
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