Wikipedia
Cardback
Cardback is a payment recommendation platform that helps credit, debit, prepaid cardholders and mobile wallet users see their best way to pay for transactions at restaurants, cafes, retail shopping outlets, spas, hotels, airports, petrol pumps, movie theaters, and e-commerce websites. Recommendations are based on card and wallet offers, features and reward points.
This service is currently available in six cities in India - Delhi-NCR, Mumbai, Bangalore, Pune, Chennai and Hyderabad.