Its closest app rival at the time was YouTube, which, according to the company's own statement and data from mobile insight firm App Annie, had about 260 million users in India then.
In the month of December, YouTube had 425 million monthly active users on Android phones and tablets in India, according to App Annie, the data of which an industry executive shared with TechCrunch.
In comparison, WhatsApp had 422 million monthly active users on Android in India last month.
Factoring in the traction both these apps have garnered on iOS devices, WhatsApp still assumes a lead in India with 459 million active users, but YouTube is not too far behind with 452 million users.
India had about 50 million internet users in 2010, but it ended the decade with more than 600 million.