Podcasting keeps getting bigger, but for marketers, a bigger medium also creates a bigger planning challenge.

There are more shows, creators and audiences to choose from, making a simple question increasingly important: Which podcast network can give my brand meaningful reach without sacrificing relevance?

For advertisers looking for podcast reach at scale, the answer starts with iHeartPodcasts. According to Podtrac’s October 2026 U.S. publisher rankings, iHeartPodcasts is the #1 podcast publisher globally, with a monthly audience of more than 35 million and nearly 177 million monthly downloads.

That industry leadership extends beyond publishing. The iHeart Audience Network is the largest podcast sales network in the U.S., reaching about 50% of podcast listeners every month. For advertisers, that scale creates the opportunity to build meaningful reach through a single network while still reaching listeners around specific interests, passions and communities.

Learn why podcast advertising works differently when scale, trusted creators and precision work together.

What Is the Biggest Podcast Network for Advertisers?

iHeartPodcasts is the #1 podcast publisher, generating 177M U.S. monthly downloads, more than the next two publishers combined.

That scale gives advertisers access to audiences across categories ranging from comedy and true crime to sports, news, business and pop culture, creating more ways for brands to connect around the interests and communities that matter to their customers.

iHeartPodcasts distributes programming across all major podcast listening platforms. That means audiences can listen where they choose while advertisers gain access to the scale of the larger network.

For marketers, that makes podcast planning simpler. A national advertiser can build meaningful reach across categories and audiences, while a brand with a more specific objective can focus investment around the listeners most relevant to its business.

Why Does Podcast Reach Matter for Advertisers?

Podcasting has become a mass-reach behavior.

There are now 158 million monthly podcast consumers in the U.S., representing 55% of Americans. Just as important, podcast audiences are spending meaningful time with the medium across age groups.

That creates an opportunity beyond impressions alone.

Podcast listening is intentional. People seek out particular subjects, personalities and communities, then return to the shows they value. For marketers trying to earn attention in a fragmented media environment, that relationship matters.

It is also why iHeart make a Guaranteed Human promise. The value of reaching millions of listeners grows when those listeners have actively chosen the voices speaking to them.

How Does iHeart Help Advertisers Reach the Right Podcast Listeners?

The largest possible audience is not always the right audience.

Effective podcast advertising starts by defining who a brand wants to reach and then using the network’s scale to find more of those listeners.

Depending on campaign objectives, brands can plan around factors such as audience characteristics, interests, content categories and listening behaviors. Advertisers can also choose different approaches to creative, from scalable produced spots to integrations that tap into the relationship between listeners and the creators they trust.

That combination gives marketers flexibility. Brands can pursue broad awareness across the network, concentrate impressions among particular audiences or build a campaign that combines reach with creator-driven storytelling.

The goal is straightforward: use scale to create more opportunities to reach the people who matter.

And that breadth includes shows that reach audiences at meaningful scale. iHeartPodcasts produces the most podcasts with 1M+ monthly downloads, 2X the nearest publisher. That gives brands more opportunities to pair scale with the personalities, subjects and communities that make podcasting such a powerful environment for connection.

Why Do Podcast Creators Make That Scale More Valuable?

Podcasting remains deeply human.

Listeners spend hours hearing hosts tell stories, share opinions, explore interests and invite audiences into conversations. That repeated exposure can create familiarity that is difficult to reproduce in more transactional media environments.

More than 80% of iHeart listeners consider hosts their friends.

That gives brands a different kind of advertising environment. A message can appear alongside content audiences intentionally chose and voices they already know, giving advertisers an opportunity to build relevance as well as reach.

For marketers facing growing pressure to earn attention and trust, that combination is increasingly valuable.

Can Podcast Advertising Be Measured?

Absolutely! Podcast campaigns can be evaluated against objectives across the marketing funnel rather than treated only as an awareness channel.

Depending on campaign design and goals, measurement can include outcomes such as brand awareness, consideration, purchase intent, website activity, transactions, store traffic and sales lift.

That makes scale more actionable. Advertisers can start with a clear business objective, identify the audiences and formats best suited to that goal, and measure whether the campaign moved the metrics that matter.

For brands evaluating podcast partners, measurement should be part of the conversation from the beginning, alongside reach, audience strategy and creative.

What Should Advertisers Look for in a Podcast Network?

Reach is a powerful starting point, but it shouldn’t be the only consideration.

When evaluating a podcast advertising network, marketers should ask:

• How large is the network's audience?
• Does its content reach the audiences and communities my brand needs?
• Can I combine broad reach with more precise targeting?
• What creative and host-led advertising options are available?
• Can campaign performance be measured against my business objectives?

The strongest podcast strategy brings these capabilities together.

With iHeartPodcasts, brands can tap into the reach of the world's #1 podcast publisher while connecting with people through content they have actively chosen to hear.

That is scale made more useful, more relevant and more human.

FAQs

What is the biggest podcast publisher?
iHeartPodcasts is the #1 podcast publisher globally according to Podtrac, with more than 35 million monthly audience members and nearly 177 million monthly downloads.

Where can advertisers buy podcast ads?
Advertisers can work with podcast networks and publishers to buy campaigns across individual shows or larger audiences. The iHeartPodcast Network gives brands access to premium podcast inventory, audience targeting, multiple advertising formats and measurement within a single network.

Where are iHeartPodcasts available?
iHeartPodcasts are distributed across all major podcast platforms, including the iHeartRadio app, allowing audiences to listen on the services they already use.

Can podcast advertising be targeted and measured?
Yes. Podcast campaigns can use audience and content strategies to reach relevant listeners, while measurement can connect campaigns to objectives including awareness, consideration, purchase intent, website activity and sales outcomes.

Ready to put the reach of the world’s #1 podcast publisher to work for your brand? Connect with our team to build a podcast advertising strategy designed around the audiences and outcomes that matter to your business.