I have to say Zebpay is really popular, I have seen many people buy bitcoins through this app just to get a 500 Rs discount on their Amazon and Flipkart cards.
Definitely recommend Zebpay and we also need more of the same please.
Also if you are looking to invest money and play your cards right, BTC can offer you close to 70-80% YTD margins on your initial investments, think about that for a second and let it sink in while most MFs and Insurance schemes top at 15-20%.
Also if you were in the USA previously or have access to a USD bank account from your friend or family, you can buy BTC from Coinbase and sell it instantly on Localbitcoins.com India site for atleast a Rs 2000 profit due to the markup price.
If you trade smartly you can make lakhs and even crores of rupees a year.