Facebook-owned WhatsApp has confirmed it has crossed over 40 crore monthly active users in its biggest market India, a hike of over 100% in the past two years. WhatsApp Global Head Will Cathcart met with NITI Aayog CEO Amitabh Kant and Union IT Minister Ravi Shankar Prasad. Cathcart had announced WhatsApp's payment service will be launched in India this year.