Case Study: OBI Achieves 93% ROAS Growth with Topsort's AI-Powered Auctions

OBI improves ROAS by 93% with Topsort

OBI, one of Europe's largest home improvement retailers, faced challenges scaling its retail media program due to the complex, project-driven nature of its catalog. Static targeting and manual campaign management could not keep up with diverse shopper intent across its many categories. To address this, OBI partnered with vendor Topsort to modernize its infrastructure with a real-time, AI-powered auction system.

By implementing Topsort's solution, which combined relevance-driven product selection with AI-powered autobidding (BIDLESS™), OBI significantly improved its retail media performance. From December 2025 to June 2026, the retailer achieved a 93% improvement in ROAS, a 136% increase in attributed sales, a 127% growth in purchases, and a 34% rise in active advertisers, demonstrating the impact of more intelligent ad decisioning.

OBI