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Otrium

eCommerce & Marketplaces · Amsterdam, Netherlands · Founded 2015

Otrium is an online marketplace focused on providing a solution for end-of-season fashion inventory. Founded in 2015 in Amsterdam by childhood friends Milan Daniels and Max Klijnstra, the company aims to ensure all clothing produced is worn, addressing the industry's issue of excess stock. The founders' journey began after they experienced the challenge of unsold inventory firsthand with their own sweater brand, which they launched after graduating. This experience led them to research the market and identify a gap for a technology-driven platform that could help brands sell their previous season's collections without the high margins taken by traditional stock buyers or the barriers to entry of physical outlets. The company operates on a managed marketplace model, providing a full-service B2C platform where fashion brands can set up their own online outlet store. Otrium handles the storing, marketing, and selling of the items on behalf of the brands, who retain full control over pricing, merchandising, and visibility. This model allows brands to convert potential losses from unsold inventory into revenue. Otrium's revenue is primarily generated through a commission on each sale made through its platform. It has also offered premium features to consumers, such as early access to sales, as an additional revenue stream. Since its inception, Otrium has attracted significant investment, raising a total of $156 million over six funding rounds. Key funding includes a Series B round of €24 million in May 2020 and a Series C round of approximately €102.3 million ($120 million) in March 2021. These funds have been used to fuel international expansion, including a launch in the US in 2021, and to develop its technology platform. However, the company later shifted its strategic focus to the European market, selling its US arm and exiting the UK market in 2023, only to announce a relaunch in the UK in late 2025. Otrium partners with over 400 brands, ranging from established names like Tommy Hilfiger and AllSaints to emerging designers. The platform serves a community of over 4 million registered members across Europe, offering discounts of up to 75%. Keywords: off-price fashion, end-of-season inventory, managed marketplace, fashion e-commerce, designer outlet, sustainable fashion, excess inventory solutions, fashion technology, B2C platform, apparel marketplace, stock management, circular fashion, online retail, direct-to-consumer outlet, brand inventory, fashion resale, conscious consumption, clothing waste reduction, European fashion market, Amsterdam startup