Parag Agrawal is the new CEO of Twitter Inc. He has replaced the microblogging site’s cofounder and CEO Jack Dorsey, who in his exit letter appreciated the decade-long work of the IIT-Bombay alumnus in different roles in the company. Agrawal had joined Twitter in 2011 as an ads engineer and had been promoted to the role of chief technology officer (CTO) in 2017.