Spain’s equivalent of Leboncoin, Wallapop, relies on the young start-up AlbatrossAI to personalise in real time how a catalogue is displayed on the app. At the core of this recommendation and prediction challenge, the Swiss start-up applies to e-commerce a sequential embedding technology, similar to that used by ChatGPT and already deployed by YouTube and Instagram. Here’s the breakdown.
The Spanish C2C second-hand platform Wallapop, recently acquired for €600 million by South Korean group Naver (also owner of the American second-hand marketplace Poshmark), entrusted AlbatrossAI in July 2025 with the real-time personalisation of product displays on an app. For the second-hand marketplace, which posted €101 million in revenue in 2024 (up by 13% year-on-year, with a net loss of €25 million), “the A/B test was first launched on 1% of their traffic and is gradually increasing”, a spokesperson for the Swiss start-up told mind Retail.
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Article authors
Sophie Baqué
Chief Editor of mind Retail