Carbonxgen is a UK-based sustainability and energy management consultancy specialising in complex, multi-site portfolios, particularly commercial real estate. It offers bureau services including energy procurement, energy data management, occupier recharging (tenant energy billing), Net Zero strategy support, technical compliance services (ESOS, heat network regulations, SECR), and sustainable procurement (including MHHS). Its technology ecosystem, including the CarbonXcelerate platform and a Carbon Accounting platform, underpins its consultancy by providing a single source of truth for energy, water, carbon and cost data.