WhatsApp, the messaging app has more than 250 million monthly users. WhatsApp was launched in 2009 and lets users to send free messages across the Globe via WhatsApp Application.
Earlier in June 2013, WhatsApp revealed that it hit a daily record in terms of number of message send through the platform
new daily record: 10B+ msgs sent (inbound) and 17B+ msgs received (outbound) by our users = 27 Billion msgs handled in just 24 hours!
— WhatsApp Inc. (@WhatsApp) June 12, 2013
Google and Facebook were both rumored to acquire the messaging app for $1 billion, but the Company’s CEO has denied its interest in selling the app.