OpenAI scales ChatGPT Ads European expansion across 31 new markets

The ChatGPT Ads European expansion signals OpenAI's transition from experimental monetization to a sophisticated performance marketing platform. By integrating conversion optimization and third-party measurement, OpenAI is directly competing for performance budgets typically reserved for Google and Meta. For the streaming ecosystem, this provides a high-intent environment to reach users during the discovery phase of the customer journey. As AI-driven search gains utility, these ad placements offer a unique signal of user intent that traditional keyword-based search often misses. Watch for the launch of the self-service Ads Manager later this summer to see how quickly small-to-medium businesses adopt the platform.

OpenAI's advertising ambitions sit atop a rapidly growing user base that is already reshaping mobile network traffic patterns. According to Ericsson's June 2025 Mobility Report, ChatGPT was the most-downloaded mobile AI app with 250 million installations and 546 million monthly active users as of April 2025, accounting for 60% of total GenAI traffic and 70% of all AI uplink traffic. That scale gives OpenAI a distribution advantage as it expands ChatGPT Ads into 31 European markets, since advertisers gain access to an audience that is already engaging with the platform at high frequency across both mobile and desktop surfaces.

The competitive landscape for AI-driven advertising is intensifying as other platforms move to monetize conversational interfaces. Google has been integrating sponsored results into its AI Overviews within Search, while Meta continues to test ad placements within its AI assistant experiences. OpenAI's differentiation with ChatGPT Ads lies in its first-party intent data, gathered directly from user queries, which enables conversion optimization and geo-targeting without relying on third-party cookies. The introduction of the OpenAI Pixel for third-party measurement positions the platform to compete for performance budgets that have historically flowed to Google and Meta, particularly in European markets where privacy regulations under GDPR already constrain cookie-based targeting.

The infrastructure implications of scaling an ad-supported AI platform are significant for network operators. Ericsson's research found that GenAI-related usage shows a 26% uplink share compared to the typical 10% for most mobile traffic, reflecting the interactive and content-generation-heavy nature of these applications. As ChatGPT Ads introduces richer media formats and real-time conversational ad experiences across European markets, the bidirectional traffic profile of AI workloads will place additional demands on network capacity. Ericsson noted that while current 5G spectrum can handle present GenAI traffic levels, operators will need to plan for additional midband and centimeter-wave spectrum to support the uplink requirements of next-generation AI applications, a consideration that becomes more acute as ad-supported AI services scale to hundreds of millions of users.