India's digital payments industry has been growing rapidly, with the market expected to reach $10 trillion by 2026. This growth can be attributed to the Government of India and the Reserve Bank of India's efforts to promote digital payments, the advent of FinTech, and Payment Service Providers or PSPs building infrastructure for seamless transactions. One of the most significant developments in this space is the Unified Payments Interface or UPI, which is estimated to account for about 90% of total transactional volume in retail digital payments over the next five years. UPI has been instrumental in driving financial inclusion and transforming India's payment landscape. Another essential component of India's digital payment ecosystem is India Stack, a unified software platform aimed at bringing India's population into the digital age. India Stack is the largest open API in the world and has enabled financial inclusion for 80% of the population in just six years. As we move forward, let's take a closer look at the key players in the Indian digital payment space and how they are shaping the industry.