What Is a Podcast Network?
A podcast network is a company that brings many podcasts under one commercial roof, chiefly to sell advertising across them, and often to produce, promote and distribute them as well.
The term covers two different businesses, and the clearest definitions come from Podtrac, which ranks them. Its ranking page defines a podcast publisher as “An entity or individual which owns, creates and publishes podcasts,” adding that a publisher “may or may not sell advertising in their podcasts.” A sales network is “An entity which sells advertising in an aggregated network of podcasts which they may or may not own, create and publish” (Podtrac). In everyday use, “network” can mean either. iHeartMedia, for example, appears in Podtrac's list twice: as iHeartPodcasts, the publisher, and as iHeart Audience Network, a sales network.
Edison Research's quarterly network ranker uses the advertising view: networks are “ranked by the reach of the network that represents the advertising for the show” (Edison Research at SSRS). That is the practical test. The network that matters to an advertiser is the one that sells the show's ads, whoever made it.
Podcast Networks at a Glance
| Question | Answer | Source |
|---|---|---|
| Types | Publisher (owns and makes shows) and sales network (sells ads, may not own shows) | Podtrac |
| Main revenue | Advertising; more than 95% of group revenue at Acast | Acast |
| How creators are paid | A pre-agreed share of ad spend; sometimes a minimum revenue guarantee | Acast |
| Other services | Commercial, distribution, marketing and production services | Audioboom |
| Largest in Podtrac, Sept 2026 | iHeart Audience Network, 57,562,000 U.S. unique monthly audience | Podtrac |
| Largest in Triton, Aug 2026 | iHeart Audience Network, 65.9 million average weekly downloads | Triton Digital |
| Largest by survey reach, Q2 2026 | Spotify, then SiriusXM Podcast Network, then iHeartPodcasts | Edison Research |
How Podcast Networks Work
Networks bundle four services. Not every network offers all of them, and terms are set show by show.
- Ad sales. The core service. A network gives advertisers one place to buy across many shows, and gives shows a sales team they could not afford alone. Acast says its business is “predominantly based on advertising sales, representing more than 95% of the group revenue,” delivered as pre-produced ads, sponsorships and branded content. Buying can be direct or programmatic: SiriusXM Media offers a direct insertion order or programmatic buying through a demand-side platform (SiriusXM Media).
- Revenue share and guarantees. Acast says creators “receive a pre-agreed share of advertising spend.” Its annual report adds that “minimum revenue guarantees are common” in the industry, describing them as a guaranteed income in the form of monthly payments or an advance, offered “to attract and retain leading podcast creators” (Acast Annual Report 2025). Acast reports paying creators more than half a billion dollars since it began. Individual splits are rarely published.
- Production. Some networks make shows in-house. Amazon's Wondery built a narrative studio known for “Dr. Death” and “American Scandal”; in August 2025 Amazon said that studio “will be incorporated into Audible” (TheWrap).
- Distribution and promotion. Audioboom describes providing “commercial, distribution, marketing and production services” to its network of shows (Audioboom). In our observation, promotion inside a network usually means trailers or ads for one show running in another; Podtrac's site offers “Podcast-to-Podcast Promo Attribution” to measure such swaps.
Hosting companies can act as networks too. Libsyn, a podcast host, ranks fourth in Podtrac's September 2026 list as a sales network, with 620 active shows.
Podcast Network Examples
Six networks named often in the trade, with facts from their own pages, filings or reporting we read today:
| Network | Owner and model | Verified detail |
|---|---|---|
| iHeartPodcasts | iHeartMedia; Podtrac lists it as a publisher (iHeartPodcasts) and, separately, a sales network (iHeart Audience Network) | Describes itself as “the #1 podcast publisher globally”; its page cites 162,301,000 monthly downloads from Podtrac's September 2026 ranking (iHeartMedia) |
| SiriusXM Podcast Network | SiriusXM; ads sold by SiriusXM Media | Lists shows such as Conan O'Brien Needs a Friend and Call Her Daddy; ranked No. 2 by reach in Edison's Q2 2026 ranker (SiriusXM Media; Edison) |
| Wondery | Amazon, which announced the deal in December 2020 | In August 2025 its narrative studio moved into Audible; creator-led shows such as New Heights and Armchair Expert kept the Wondery brand under Amazon's Talent Services; about 110 jobs affected (TheWrap; iMore) |
| NPR | Public broadcaster; sponsorship sold by National Public Media | NPM calls itself “the sponsorship subsidiary of NPR”; it also became sole podcast sales representative for This American Life from August 1, 2024 (NPM; NPM) |
| Audioboom | AIM-listed company; sales network and marketplace | 2025 revenue of about US$80.4 million, of which its Showcase ad marketplace was about US$30.4 million (Audioboom) |
| Acast | Nasdaq Stockholm-listed; hosting and ad marketplace | Hosts more than 140,000 podcasts and works with more than 4,000 advertisers; 2025 net sales SEK 2,516.9 million and 4,436 million listens (Acast; Acast year-end report) |
How Networks Appear in Podcast Rankers
Three rankers publish network lists in the U.S., and they measure different things.
- Podtrac publishes a monthly ranking of top U.S. publishers and networks by U.S. Unique Monthly Audience, which counts a listener once however many of a publisher's shows they hear. It also shows U.S. downloads and streams and active shows. “Ranking data only includes publishers that participate in Podtrac measurement for the full month” (Podtrac; Podtrac methodology).
- Triton Digital publishes a monthly U.S. Top Sales Network report “ranked by Average Weekly Downloads in accordance with v2.2 of the IAB Podcast Technical Measurement Guidelines” (Triton Digital). Its rankers site says “Reported companies must opt-in to the public release of their metrics” (Triton Rankers).
- Edison Research publishes a quarterly ranking by weekly reach, based on a survey, here of 5,006 weekly podcast consumers aged 13 and older for Q2 2026. It ranks networks by the company that sells the show's ads, and its text lists Spotify first, SiriusXM Podcast Network second and iHeartPodcasts third (Edison Research at SSRS).
U.S. unique monthly audience, people
Source: Podtrac, “Top US Podcast Publishers and Networks, US Audience: September 2026.” Read October 11, 2026.
Only publishers that use Podtrac measurement for the full month are included, so SiriusXM, Spotify, Audioboom, Acast and Wondery do not appear as entries. Sales networks can include shows also counted under a publisher, so the bars should not be added together.
The rankers disagree on order because they measure different things and include different companies. iHeart leads both download-based lists. Audioboom is second in Triton but absent from Podtrac. Spotify and SiriusXM lead Edison's survey and appear in neither of the other two. Podtrac's older methodology page says ad and content networks “are not included,” while its current ranking lists sales networks with an asterisk; the current ranking page is the one to rely on. For why download totals are hard to compare at all, see why podcast download numbers mislead and what changed in the podcast download rules. Network rankers are also separate from app charts such as Apple's; see how podcast charts work.
Why Podcast Networks Matter in PR
For guest booking, the network is often a door to several shows. A network's show list tells you which producers share a parent company, which shows share an audience, and which shows carry paid placements sold by a central team. Our observations:
- Editorial and commercial are separate desks. Booking a guest goes through the show's producer. Buying an ad or a sponsored segment goes through the network's sales team. Mixing the two in one email slows both. See how to pitch yourself as a podcast guest.
- Network size is not show fit. A network with tens of millions of listeners still has shows with small, specific audiences. Pick the show, then check the network.
- Paid appearances need disclosure. Some networks sell branded content and sponsored segments. If an appearance is paid, the FTC says the connection should be disclosed clearly (FTC); our comparison of podcast guesting vs podcast advertising covers the grey zone, and what a podcast guest appearance costs covers pricing.
- Ad buyers buy reach through networks. A network buy can run across many shows at once, programmatically or by insertion order. Ask which ranker and metric any audience claim comes from, and which month.
For B2B buyers, our report on which podcasts work for B2B advertisers looks at audience fit beyond network size.
Podcast Network vs Related Terms
| Term | What it is | Relationship to a podcast network |
|---|---|---|
| Podcast publisher | A company or person that owns, creates and publishes podcasts | One kind of network; may or may not sell its own ads (Podtrac) |
| Sales network | A company selling ads across shows it may not own | The other kind of network; iHeart Audience Network and NPR Sales Network in Podtrac |
| Hosting platform | Stores audio and publishes the RSS feed | Some, like Libsyn and Acast, also sell ads; Libsyn ranks as a sales network in Podtrac |
| Podcast studio | A production company | Often part of a network, as Wondery's narrative studio was |
| Listening platform | An app such as Apple Podcasts or Spotify | Where shows are heard; Spotify also ranks as a network in Edison's survey |
| Contributor network | A publisher's pool of outside writers | Unrelated; see what a contributor network is |
Common Misconceptions About Podcast Networks
| Myth | What the sources say | Source |
|---|---|---|
| A network owns all its shows | A sales network sells ads for shows it “may or may not own, create and publish” | Podtrac |
| A ranker lists every network | Podtrac includes only publishers that measure with it; Triton's companies must opt in | Podtrac; Triton |
| All rankers agree on who is largest | Podtrac and Triton put iHeart first; Edison's survey puts Spotify first, with SiriusXM second | Edison |
| Creators are paid a flat fee | Acast pays a pre-agreed share of ad spend, sometimes with a minimum guarantee | Acast |
| A network's audience is one show's audience | Podtrac counts a listener once across all of a publisher's shows; a single show reaches a fraction | Podtrac |
Frequently Asked Questions
What is a podcast network in simple terms?
A company that groups many podcasts so it can sell their advertising together, and often produce, promote and distribute them too. Some own their shows; others only sell the ads.
How do podcast networks make money?
Mostly from advertising. Acast says ad sales are more than 95% of its revenue and that creators receive a pre-agreed share of ad spend, sometimes backed by a minimum revenue guarantee.
What is the largest podcast network?
It depends on the ranker. In Podtrac's September 2026 ranking and Triton's August 2026 ranking, iHeart Audience Network is first. Edison Research's Q2 2026 survey of weekly reach puts Spotify first and SiriusXM Podcast Network second.
Why is a big network missing from a ranker?
Rankers only include companies that take part. Podtrac lists publishers that use its measurement for the full month, and Triton lists companies that opt in to public release.
What is the difference between a podcast publisher and a sales network?
Podtrac defines a publisher as an entity that owns, creates and publishes podcasts, and a sales network as one that sells advertising across a group of podcasts it may or may not own.
Does a podcast network matter for guest booking?
Yes, as a map. It shows which shows share a parent and a sales team. Guest bookings still go through each show's producer, while ads and sponsored segments go through the network's sales team.
Sources and Methodology
This explainer is built from Podtrac's September 2026 publisher and network ranking and its methodology page, Triton Digital's August 2026 U.S. ranker release and rankers site, Edison Research's Q2 2026 network ranker, Acast's 2025 annual and year-end reports, Audioboom's January 2026 trading update, the networks' own pages and TheWrap and iMore reporting, all read on October 11, 2026. Company pages and filings describe their own businesses. The chart reproduces Podtrac's published figures; bar widths are our arithmetic. The PR observations are our synthesis. We did not obtain any network's private revenue-share terms, and no source we read publishes typical splits.
- vendor Podtrac, Top US Podcast Publishers and Networks, US Audience: September 2026. Definitions of publisher and sales network; participation rule. Read October 11, 2026.
- vendor Podtrac, About the Podcast Industry Audience Rankings. Unique Monthly Audience definition. Read October 11, 2026.
- vendor Triton Digital, Triton Digital Announces U.S. Podcast Ranker for August 2026, September 17, 2026. Read October 11, 2026.
- vendor Triton Digital, Triton Digital Podcast Rankers. Opt-in rule. Read October 11, 2026.
- vendor Edison Research at SSRS, The Top Podcast Networks Based on Reach, Q2 2026, August 3, 2026. Read October 11, 2026.
- official Acast AB (publ), Annual Report 2025, published April 17, 2026. Company filing. Read October 11, 2026.
- official Acast, Q4: Consistent execution and a strong fourth quarter, year-end report, February 11, 2026. Read October 11, 2026.
- official Audioboom Group plc, 2025 Trading Update, RNS, January 15, 2026. Read October 11, 2026.
- vendor iHeartMedia, iHeartPodcasts. Company page. Read October 11, 2026.
- vendor SiriusXM Media, Advertise on podcasts. Company page. Read October 11, 2026.
- vendor National Public Media, About, and National Public Media to become exclusive sales representative for This American Life podcast, July 10, 2024. Read October 11, 2026.
- regulator Federal Trade Commission, FTC's Endorsement Guides: What People Are Asking. Read October 11, 2026.
- trade press TheWrap, Wondery CEO Jen Sargent to Exit as Amazon Restructures Podcasting Studio, August 4, 2025. Read October 11, 2026.
- trade press iMore, Amazon acquiring Wondery as it launches itself into the podcast wars, December 31, 2020. Quotes Amazon's announcement. Read October 11, 2026.