WhatsApp Inc. is a US-based private Application Software company that provides mobile communication and instant messaging services.

WhatsApp started as an alternative to SMS and now supports sending and receiving a variety of media: text, photos, videos, documents, and location, as well as voice calls. Messages and calls are secured with end-to-end encryption. Through a WhatsApp group named 'Let's Fight Against Tuberculosis,’ the Jorhat district’s TB control programme has introduced a system that will monitor the status of patients and keep a ground-level tab on TB-control programmes: WhatsApp Product