India, being one of the fastest growing internet start-up ecosystem in the world, realizes that innovation-led rapid, yet all-inclusive growth can lead to economic and social transformation. Once a start-up identifies a repeatable business model and plans scalability to the next level, the key challenges include hiring and retaining talent, bringing on a good management team and putting stable and efficient processes for market scalability. In this context, this study attempts to figure the role of entrepreneurs when internet start-ups enter the growth phase. Four specific strategies that start-up entrepreneurs should adopt through the phase of scaling and growth are analyzed; each with a relevant case-study in the Indian context. Strategic decision-making by start-up entrepreneurs can lead to sustainability and scalability of internet start-ups in India; contributing towards economic growth and employment. Entrepreneurs should focus on unique/well-adapted propositions and customer experience in the Indian context in order to ensure sustainability and growth of internet start-ups.