Similarweb (NYSE: SMWB) has launched a new data set called AI Ads, added to its Ad Intelligence product, that provides visibility into ad placements on ChatGPT, Google AI Mode, and Google AI Overviews.

According to the company, 26% of ChatGPT responses currently carry a sponsored ad, shown to users on the ChatGPT Free and Go tiers. Nearly 30% of ad-eligible Google AI Mode queries display ads, and over 40% of Google searches trigger an AI Overview, which can also include ads.

Similarweb says its AI Ads tool draws on data from real user panel conversations rather than synthetic prompts. The product allows customers to view a competitive analysis of ad placements across the three platforms, both globally and for specific markets.

The company notes that existing ad transparency tools from Meta, Google, and TikTok do not cover AI-generated answer environments. Similarweb states that advertisers currently lack visibility into whether their own ads appear in these contexts, and that Google's own tools do not address that gap.

"This is the rare moment when a major ad channel is still wide open. The advertisers who can see what's happening with AI ads now will have a real head start. Until today, nobody could see it at all," said Harel Amir, General Manager and Head of Product for Similarweb Ad Intelligence.

Jonathan Bar Vardi, Head of Strategy at Natural Intelligence, a company described as a top buyer of ChatGPT ads, said in a statement: "When we started advertising on ChatGPT, we were flying blind, no visibility into who else was in the auction or what was working. Similarweb changed that."

Similarweb said future updates to the AI Ads data set are planned to include advertiser share of voice, ad categories, and conversational intent data. The information in this article is based on a press release issued by Similarweb.