Deloitte began in London in 1845, when William Welch Deloitte founded an accountancy practice that later developed into a global professional services network. Deloitte provides audit and assurance, tax, consulting, financial advisory, risk advisory, and legal services through member firms operating across a broad international platform. The company serves organisations in government, financial services, energy, healthcare, consumer business, and technology, and maintains a significant presence across major markets worldwide.