The World's Top Podcast Publishers

"Everyone has a podcast", it seems, and while this may not quite be true, an awful lot of people are at least listening to one. As data from Podtrac shows, the biggest podcast publishers counted hundreds of millions of listens, downloads and views in May.

As this infographic illustrates, iHeart Audience Network has become quite dominant in this space, amassing 653 million globally last month. Acast follows, with almost 400 million, while Libsyn is the only other publisher to have broken the 100 million barrier in this time period.

According to Statista Market Insights, worldwide podcast advertising spending is forecast to hit $4 billion this year, with growth expected to continue up to $5 billion by 2027.