Why and how Leboncoin launched an app in ChatGPT

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While OpenAI developed a space for third-party applications within an interface since December 2025, Leboncoin, the second most visited e-commerce site in France, has launched an application in ChatGPT, becoming the first French retailer to deploy this. 
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In France, on February 10, 2026, while entering a fourth month without a CEO, Leboncoin (Adevinta group, 2024 revenue: €1.17 billion) launched an application in ChatGPT. Available via mobile or desktop, this allows ChatGPT users to search and browse the platform’s 89 million listed items through a conversational interface, directly within ChatGPT, using written or spoken prompts. In practice, after logging in, a user describes their requirements in natural language (for example: “Suggest gifts

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