Capital B operates as a bitcoin treasury company in Europe. It offers technological consulting and marketing in blockchain. The company also offers services, such as bitcoin accumulation and holding, Data Intelligence, AI, decentralized technology consulting, web development, business intelligence, and data engineering. Capital B was formerly known as The Blockchain Group and changed its name to Capital B in June 2026. The company was incorporated in 2008 and is headquartered in Puteaux, France.