The radio ad buying technology company has now raised more than $37m altogether, after closing a round featuring Intel, Universal Music and iHeartMedia.

Jelli, the US-based creator of an advertising platform for radio broadcasters, completed a $21m series B round today backed by several corporate investors.

Intel Capital, the corporate venturing arm of semiconductor technology provider Intel, mass media company iHeartMedia and record label Universal Music Group were joined in the round by Relay Ventures and First Round Capital.

Jelli’s cloud-based platform powers programmatic and automated audio ad buying platforms for customers including iHeartMedia, the owner of 858 radio stations, and Expressway from…