Business Sequoia backs a podcasting-focused, Clubhouse competitor from David Sacks Published 3 years ago on 2 September 2021 By Terry Power Yammer founder David Sacks has raised $12 million for Callin, a live audio platform Read More Related Topics:a live audio platform from investors including Sequoia Capital.backsClubhousecompetitorDavidpodcastingfocusedSacksSequoiaYammer founder and former Zenefits CEO David Sacks has raised $12 million for Callin