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Based in Paris, France, Costockage operates an online marketplace that connects individuals and businesses seeking affordable storage solutions with property owners offering idle space. The company facilitates short and long-term rentals ranging from local residential basements to secure professional facilities, and it also develops and manages its own proprietary self-storage centers across the country under the Kostok brand. Operating with a workforce of 21 to 50 employees, the platform currently serves approximately 40,000 users and manages a growing network of 10 dedicated self-storage centers. The enterprise generates an estimated $1 million in annual revenue and has secured approximately $1.4 million in total funding from a syndicate of prominent institutional investors, including Ardian, Groupe Financiere Duval, Wind Capital, and Kima Ventures. Costockage was originally founded in 2012 by co-founders Mickael Nadjar and Adam Levy-Zauberman.
Costockage has raised $1.4M across 2 funding rounds.
Costockage has raised $1.4M in total across 2 funding rounds.
Costockage is a Paris-based technology company founded in 2012 that operates the leading online marketplace for self-storage in France, connecting individuals and professionals with storage options ranging from affordable private cellars to secure professional boxes and containers.[1][2] It serves students, families, and businesses seeking nearby storage solutions, solving the problem of limited space in urban areas through a peer-to-peer (C2C) platform and its own operating arm, Kostok, which manages 10 self-storage centers across France with plans for expansion.[2][1] The company generates around $1 million in annual revenue, employs about 21 people, and was acquired by Ardian, a major private investment firm, in early 2024 to fuel growth in this burgeoning asset class.[1][2]
Costockage was co-founded in 2012 by Mickael Nadjar and Adam Levy-Zauberman in Paris, Île-de-France, emerging from the need for accessible, localized storage amid urban space constraints.[1][2] The duo leveraged their expertise in sourcing, development, and data analytics to build Europe's largest self-storage rental platform, starting as a C2C marketplace for unused spaces like private cellars before launching Kostok in 2017 to operate its own digital-first storage centers.[2] Early traction positioned it as France's #1 self-storage marketplace, culminating in its 2024 acquisition by Ardian, with the founders remaining at the helm to drive further development.[2]
Costockage rides the self-storage boom in Europe, fueled by urbanization, e-commerce growth, and demand for flexible space solutions in dense cities like Paris.[2] Its timing aligns with proptech trends, digitizing a fragmented real estate niche traditionally dominated by physical operators, while C2C elements tap into the sharing economy.[1][2] Market forces like rising real estate costs and Ardian's backing amplify its influence, positioning it to standardize self-storage as a scalable asset class with strong risk-adjusted returns, much like U.S. models.[2] By turning unused spaces into revenue and operating digital centers, it shapes the ecosystem toward efficient, tech-enabled logistics.
With Ardian's resources, Costockage is poised to rapidly expand its 10-center footprint, potentially dominating European self-storage through more developments and tech enhancements.[2] Trends like sustained urban density, e-commerce logistics needs, and proptech investments will propel it, evolving from marketplace pioneer to major operator.[2] Its influence may grow by inspiring similar platforms continent-wide, delivering first-class storage while unlocking unused space value—solidifying its role as France's go-to amid a market with its best days ahead.[2]
Costockage has raised $1.4M in total across 2 funding rounds.
Costockage's investors include Blisce, Flucas Ventures, Gaingels, Good Startup, Kima Ventures, Next Play Ventures, Marco DeMeireles, Trucks Venture Capital, Jared Leto, Justin Ziegler, ISAI.
Costockage has raised $1.4M across 2 funding rounds. Most recently, it raised $1.0M Series A in August 2016.
| Date | Round | Lead Investors | Other Investors | Status |
|---|---|---|---|---|
| Aug 1, 2016 | $1M Series A | — | Blisce, Flucas Ventures, Gaingels, Good Startup, Kima Ventures, Next Play Ventures, Marco Demeireles, Trucks Venture Capital, Jared Leto, Justin Ziegler | Announced |
| May 1, 2014 | $410K Seed | — | ISAI | Announced |
