Indian messaging app Arratai skyrockets just days after launch, poses challenge to WhatsApp According to Zoho’s CEO Sridhar Vembu, the platform has experienced an extraordinary surge in user activity, with traffic increasing by 100 times within just three days. In response to this sudden growth, the company is working hard to upgrade its infrastructure to handle the rising demand. New Delhi:Arratai, the instant messaging app developed by Zoho, is rapidly gaining popularity and posing strong competition to WhatsApp. The app, which is a homegrown alternative, has climbed to the number one position in the social networking category on various app stores. “We have faced a 100x increase in Arattai traffic in 3 days (new sign-ups went vertical from 3K/day to 350K/day).