Chorus Call Inc. | 2,517 followers on LinkedIn. Driving Success Together in 2025! Chorus Call Inc., headquartered in Pittsburgh, Pennsylvania, is a global leader in event management solutions with offices in the United States, Europe, South Africa, India, Australia, and Canada. With over 30 years of experience, the company has consistently delivered high-quality, operator-assisted calls, webcasts, AV support, & video conferencing.