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Helsinki-based sportstech company Zenniz has secured $6 million in fresh funding to accelerate its global expansion and cement its presence in North America, marking a major milestone in the fast-growing smart tennis court market. The round brings together a cross-border syndicate of investors, including Nordic VCs Butterfly Ventures and Superhero Capital, France-based growth investor Seventure Partners, and Florida-headquartered Bromélia Capital, alongside prominent angel investor Miki Kuusi, founder of Wolt. The capital injection will support Zenniz’s operational scale-up and the formal establishment of its North American headquarters in Atlanta, Georgia — a strategic move as the company doubles down on the U.S. tennis ecosystem.
Founded and headquartered in Helsinki, Zenniz develops all-in-one smart tennis court systems that combine electronic line calling, live video streaming, AI-powered performance analytics, and gamified training tools. The company positions itself as infrastructure for the modernization of racket sports, serving both competitive tournaments and recreational club environments.
“We are super excited to lead the charge with Zenniz as they cement their position in the U.S. I played competitively since I was 6, including USTA and Collegiate sanctioned tournaments, and can’t describe how inspiring it is to have a front row seat in seeing the advantages of the Zenniz become evident in the ecosystem. This genuinely is shaping up to be a revolution”, mentioned Tanya Horowitz, Partner, Butterfly Ventures.
With systems already operating across four continents and in more than 25 countries, Zenniz has emerged as one of the most visible players in the smart court category — a segment benefiting from broader digitization trends in sports performance and fan engagement.
In 2025, Zenniz launched its second-generation hardware alongside premium AI-powered services. The new funding will allow the company to ramp up production, strengthen distribution in North America, and expand feature development across its ecosystem.
“First and foremost, we warmly welcome our new venture capital investors. Currently there is strong momentum in sports tech and our VC’s expertise in hardware startups, U.S. markets, and background in tennis makes this a perfect match. Tennis as a sport is modernizing, and our comprehensive all-in-one solution is resonating extremely positively throughout the industry”, commented Zenniz CEO Eero Kuusi.
The raise follows what the company describes as a record-breaking 2025 in both revenue and partnerships. Zenniz strengthened its industry footprint through collaborations with global tennis retailer Tennis Warehouse and elite training institution Mouratoglou Academy.
“We are now ready to seriously scale up our operations. At the same time we have the resources to start pushing out many features both on and off court, that we, as users of the systems, have been dying to implement. It’s going to be such a great year for both new and existing Zenniz users”, finishes Eero Kuusi.
In June 2025, Zenniz also became one of the first vendors certified by the International Tennis Federation for electronic line calling in international tournament play at the club level — a validation that places it in rare company in the officiating technology space.
“Being heavily involved in tennis especially in Brazil and across the latin american world, investing and joining forces with Zenniz is an opportunity of a lifetime. Together we are determined to help tennis and racket sports take important steps forward, benefiting everyone from the pros and club managers to people brand new to the sport”, says Jefferson Plentz from Bromélia Capital.
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