INTERSPORT Germany partners with Sellforte to measure and optimize omnichannel marketing performance

Heilbronn, Germany, December 2025 – INTERSPORT Germany, one of Europe’s largest sports retail organizations, has partnered with Sellforte, a leading Marketing Mix Modeling (MMM) and AI-powered marketing optimization platform, to measure and enhance marketing effectiveness across online and offline channels. 

With around 1,400 retailers across Germany, INTERSPORT is taking a major step toward data-driven growth by introducing advanced marketing measurement to understand the true drivers of sales across digital, local, and in-store touchpoints. 

A new level of marketing transparency 

Through this collaboration, INTERSPORT will use Sellforte’s causal MMM technology to evaluate media ROI and promotional efficiency across its omnichannel activities, from digital platforms like Meta, Google, TikTok, and Bing to traditional offline media. 

The partnership enables INTERSPORT’s data, marketing, and analytics teams to gain deeper transparency into how marketing investments influence both online and in-store performance, empowering smarter, more efficient decisions. 

Sellforte’s platform will deliver continuous, actionable insights to guide INTERSPORT’s media planning and campaign optimization across its diverse retail network. 

Turning data into action 

“When I first worked with Sellforte at my previous company, we ran an independent experiment to validate their model’s recommendations. The actual results came within just a few percent of their forecast, a level of precision that immediately stood out. That experience gave me complete confidence in Sellforte’s approach, and it’s exactly why I wanted to bring it to INTERSPORT as well.” 

- Michael Kern, Head of Online Marketing, INTERSPORT Germany 

 

“We’re thrilled to welcome INTERSPORT Germany as a new Sellforte customer and bring causal measurement and optimization to one of Europe’s most trusted sports retail networks,” said Paul Arpikari, Chief Commercial Officer at Sellforte. “This partnership represents the next step in agentic MMM, powered by Sellforte AI, where data doesn’t just explain the past but guides the future. Together, we’re helping INTERSPORT make faster, smarter, and more transparent investment decisions.” 

The onboarding phase will run through early 2026, followed by continuous reporting and optimization through the Sellforte platform. This collaboration highlights INTERSPORT’s commitment to data-driven retail innovation, turning marketing insights into measurable ROI improvements across campaigns from leading brands such as Adidas, Speedo, and more. 

About INTERSPORT Germany 

INTERSPORT Germany is one of the largest sports retail organizations in Europe, representing around 1,400 retailers nationwide. With a mission to bring sports closer to everyone, INTERSPORT combines the strength of its retail network with digital commerce excellence to deliver exceptional products and experiences to consumers. 

About Sellforte 

Sellforte is an AI-powered marketing optimization platform built for retail, eCommerce, and DTC brands.  

Powered by Sellforte AI, the platform goes beyond analytics — combining proven Marketing Mix Modeling with forward-looking intelligence to forecast, recommend, and optimize media budget decisions with confidence and precision.