The India Stack provides a digital identity, payments, and data-sharing infrastructure for India's 1.2 billion citizens. It includes Aadhaar for biometric identity, UPI for digital payments, and APIs for e-KYC and digital authentication. Various government agencies and private companies utilize different aspects of the India Stack to deliver services related to banking, financial inclusion, healthcare, transportation and more. While it has achieved significant digital inclusion, issues around data privacy and security continue to be addressed.