# EMARKETER buys RetailX's research arm, adds AI Visibility Index data

Published: 2026-09-25T20:03:18.604Z · Source: PPC Land (https://ppc.land/emarketer-acquires-retailx-research-arm-adds-uk500-and-customerx-index/)
Source date: 2026-09-25

EMARKETER has acquired the research arm of RetailX, taking on its research team and tools — including the UK500 ranking of top UK ecommerce retailers and the pan-European CustomerX Index — per a September 24 announcement reported by PPC Land. RetailX's separate events business continues operating independently under an ongoing media partnership with EMARKETER. EMARKETER said it plans to enrich both rankings with data from its own AI Visibility Index, which tracks brand visibility across AI systems including ChatGPT, Gemini and Copilot, and will launch a US edition of the CustomerX Index within weeks; the acquisition price and staff numbers were not disclosed.

Why it matters: It's a sign the AI-visibility-tracking market is consolidating into mainstream research firms, not just specialist AEO vendors.

## What this answers

**What is EMARKETER's AI Visibility Index?**

It's EMARKETER's tool for tracking how visible brands are in AI systems such as ChatGPT, Gemini and Copilot; the company plans to fold that data into the rankings it acquired from RetailX.

**What did EMARKETER acquire from RetailX?**

EMARKETER bought RetailX's research team and tools, including the UK500 ranking of top UK ecommerce retailers and the pan-European CustomerX Index, while RetailX's events business stays independent.


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