Top Podcast Tracking Services by Episode Share (May 2025)

Now that we have a good idea of which podcast hosts are producing new podcast episodes, let’s turn our attention to third-party podcast analytics services.

These services are typically provided by a company that is not the podcast host, but can provide tracking and analytics by being specified as the underlying media file url, which then redirects back to the host. Sometimes, these services are implemented as custom prefixes (taking the original media url and adding a prefix to it), but not always.

By intercepting every episode media file request, these analytics services can provide a view that is potentially larger than what the underlying podcast host analytics can provide.

Podtrac, one of the most popular services, released some interesting data about their US download figures for September 2021.

But how representative of the entire podcast world is this data? How many podcasters use services like these?

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We already did the work of analyzing every single new podcast episode published (about 1.8 million in May 2025), identifying which podcast hosting company it belongs to.

We used the actual media file url (past any tracking redirects) to identify the host instead of the feed url domain, which can often undercount hosts that offer custom domains.

Let’s now take a look at the tracking services themselves. Of the new episodes that were published in May, how many of them included one or more of these tracking services? Some episodes had as many as nine of these redirecting trackers!

Note we can only observe “client-side” trackers. There are other podcast analytics services such as Triton Digital that receive private request logs directly from partner hosts. Like first-party podcast host analytics, the reach of these services is not measurable in a public way, and thus not included in this analysis. Some services like Podtrac provide both client-side and log-based measurement, only their client-side prefix-based measurement is available for public observation here.

First, a quick chart of the top podcast tracking services over time, based on share of new episodes every month.

Podtrac and Chartable are the clear top two trackers of new podcast episodes.

Now let’s graph the same data again, excluding them to see the others more clearly.

Overall

At least one tracker was found on 18.45% of new episodes in May, growing 2.07% from last month.

For episodes that used at least one tracker, here are the top underlying podcast hosts:

1. Spreaker 42.70%
2. Megaphone 10.62%
3. Simplecast 10.42%
4. Omny Studio 6.45%
5. Blubrry 3.69%
6. Libsyn 2.27%
7. Audioboom 2.08%
8. Transistor 1.36%
9. ART19 1.28%
10. Buzzsprout 1.20%

Individual Service Rankings

And now, the full list of individual podcast analytics services ordered by new episodes published during the month of May 2025.

1. Podtrac

Podtrac was found on 12.48% of new episodes in May, growing 1.03% from last month.

Of these, 10.63% had one other tracker, 7.60% had 2 other trackers, 1.39% had 3 other trackers, 1.36% had 4 other trackers, 0.93% had 5 other trackers, 0.45% had 6 other trackers, 0.20% had 7 other trackers, and 0.02% had 8 other trackers.

8.86% also included Podsights, 6.41% also included Adswizz, 6.09% also included Podscribe, 5.36% also included Chartable, 3.12% also included Podroll, 2.27% also included Spotify, 2.23% also included Magellan AI, 1.54% also included Swap.fm, 1.31% also included Podcorn, 1.25% also included Claritas, 1.25% also included Blubrry, 1.21% also included OP3, 0.97% also included ArtsAI, 0.71% also included Audiotakes, 0.55% also included Gumshoe, 0.53% also included Podder, 0.42% also included Veritonic, 0.08% also included CoHost Prefix, 0.05% also included United Podcasters, 0.04% also included Feedpress, 0.02% also included Podkite, 0.01% also included Médiamétrie, 0.01% also included AdBarker, and <0.01% also included Zencastr.

For episodes that used Podtrac, here are the top underlying podcast hosts:

1. Spreaker 62.99%
2. Megaphone 8.91%
3. Omny Studio 6.05%
4. Simplecast 5.14%
5. Audioboom 3.04%
6. Libsyn 2.29%
7. Transistor 1.60%
8. Soundcloud 1.03%
9. Futuri Media 0.83%
10. Cesky rozhlas 0.64%

2. Adswizz by Pandora

Adswizz was found on 2.97% of new episodes in May, shrinking 0.01% from last month.

Of these, 15.39% had 2 other trackers, 14.38% had one other tracker, 8.25% had 3 other trackers, 2.28% had 4 other trackers, 1.09% had 5 other trackers, 0.62% had 6 other trackers, 0.31% had 7 other trackers, and 0.04% had 8 other trackers.

26.96% also included Podtrac, 14.47% also included Podscribe, 12.26% also included Magellan AI, 11.87% also included Podroll, 8.76% also included Audiotakes, 3.59% also included Podsights, 2.44% also included Swap.fm, 2.37% also included Spotify, 2.09% also included Claritas, 1.23% also included Blubrry, 1.17% also included ArtsAI, 1.06% also included Chartable, 0.89% also included Podder, 0.61% also included OP3, 0.50% also included Veritonic, 0.24% also included Podcorn, 0.09% also included Gumshoe, and 0.05% also included United Podcasters.

For episodes that used Adswizz, here are the top underlying podcast hosts:

1. Simplecast 61.64%
2. Futuri Media 5.57%
3. StreamGuys 5.46%
4. Podigee 5.42%
5. SoundStack 5.37%
6. NRJ-Group 3.75%
7. Omny Studio 3.42%
8. Castos 2.11%
9. podcaster.de 1.39%
10. WNYC 0.86%

Spotify (Chartable, Podsights, and Ad Analytics)

At least one Spotify tracker was found on 2.60% of new episodes in May, growing 4.52% from last month.

Of these, 56.09% also included Podtrac, 28.86% also included Podscribe, 13.95% also included Magellan AI, 7.87% also included Claritas, 7.84% also included Adswizz, 7.42% also included Swap.fm, 5.93% also included ArtsAI, 4.82% also included Audiotakes, 3.15% also included Podcorn, 3.14% also included Gumshoe, 2.89% also included Podroll, 2.85% also included OP3, 2.39% also included Veritonic, 1.58% also included Podder, 0.42% also included Blubrry, 0.32% also included United Podcasters, 0.26% also included CoHost Prefix, 0.07% also included Feedpress, 0.03% also included Podkite, 0.02% also included Firstory, 0.01% also included Zencastr, and <0.01% also included AdBarker.

For episodes that used at least one Spotify tracker, here are the top underlying podcast hosts:

1. Megaphone 57.08%
2. Omny Studio 17.75%
3. Simplecast 6.79%
4. ART19 2.94%
5. Transistor 2.58%
6. Audioboom 1.88%
7. Soundcloud 1.56%
8. Libsyn 1.37%
9. Spreaker 1.15%
10. WNYC 0.98%

3. Podsights by Spotify

Podsights was found on 1.74% of new episodes in May, growing 5.80% from last month.

Of these, 35.43% had one other tracker, 22.48% had 2 other trackers, 10.78% had 4 other trackers, 9.19% had 3 other trackers, 6.76% had 5 other trackers, 2.83% had 6 other trackers, 1.07% had 7 other trackers, and 0.11% had 8 other trackers.

63.70% also included Podtrac, 40.86% also included Chartable, 30.44% also included Podscribe, 15.87% also included Magellan AI, 9.38% also included Swap.fm, 6.69% also included Claritas, 6.14% also included Adswizz, 5.67% also included ArtsAI, 5.31% also included Audiotakes, 4.73% also included Spotify, 4.14% also included Podcorn, 3.91% also included Gumshoe, 3.90% also included OP3, 3.11% also included Veritonic, 2.96% also included Podroll, 2.10% also included Podder, 0.44% also included Blubrry, 0.35% also included CoHost Prefix, 0.34% also included United Podcasters, 0.11% also included Feedpress, 0.03% also included Podkite, and 0.01% also included Zencastr.

For episodes that used Podsights, here are the top underlying podcast hosts:

1. Megaphone 61.71%
2. Omny Studio 21.58%
3. Simplecast 3.72%
4. Transistor 3.67%
5. Audioboom 2.01%
6. ART19 1.48%
7. RedCircle 1.27%
8. Libsyn 1.20%
9. WNYC 1.14%
10. Spreaker 0.61%

4. Podscribe

Podscribe was found on 1.61% of new episodes in May, growing 4.74% from last month.

Of these, 24.32% had 3 other trackers, 19.58% had one other tracker, 16.06% had 4 other trackers, 12.81% had 2 other trackers, 9.40% had 5 other trackers, 4.02% had 6 other trackers, 1.53% had 7 other trackers, and 0.12% had 8 other trackers.

47.35% also included Podtrac, 42.51% also included Magellan AI, 32.92% also included Podsights, 26.75% also included Adswizz, 24.57% also included Audiotakes, 16.66% also included Chartable, 15.95% also included Spotify, 14.20% also included Claritas, 11.18% also included ArtsAI, 8.10% also included Swap.fm, 4.81% also included Podcorn, 4.23% also included Gumshoe, 4.18% also included Podroll, 3.76% also included OP3, 3.55% also included Veritonic, 3.33% also included Podder, 0.40% also included United Podcasters, 0.38% also included CoHost Prefix, 0.25% also included Blubrry, 0.06% also included AdBarker, 0.01% also included Podkite, and 0.01% also included Zencastr.

For episodes that used Podscribe, here are the top underlying podcast hosts:

1. Megaphone 39.12%
2. Simplecast 24.99%
3. Libsyn 8.71%
4. Omny Studio 5.76%
5. ART19 4.74%
6. Audioboom 3.68%
7. Transistor 3.08%
8. RedCircle 2.96%
9. Spreaker 2.33%
10. WNYC 1.58%

5. Blubrry

Blubrry was found on 1.40% of new episodes in May, growing 11.00% from last month.

Of these, 15.07% had one other tracker, 0.62% had 2 other trackers, 0.15% had 3 other trackers, 0.13% had 4 other trackers, 0.04% had 5 other trackers, and 0.02% had 6 other trackers.

11.18% also included Podtrac, 2.60% also included Adswizz, 1.34% also included Feedpress, 0.54% also included Podsights, 0.48% also included OP3, 0.29% also included Podcorn, 0.28% also included Podscribe, 0.21% also included Swap.fm, 0.21% also included Podder, 0.17% also included Chartable, 0.12% also included Spotify, 0.11% also included Magellan AI, 0.04% also included ArtsAI, 0.04% also included Podkite, 0.01% also included Audiotakes, and 0.01% also included Veritonic.

For episodes that used Blubrry, here are the top underlying podcast hosts:

1. Blubrry 48.70%
2. OnePlace.com 4.92%
3. Amazon S3 3.64%
4. Libsyn 2.67%
5. LightSource 2.48%
6. Soundcloud 1.72%
7. Spreaker 1.33%
8. Internet Archive 1.06%
9. Megaphone 0.70%
10. Feedpress 0.60%

6. Chartable by Spotify

Chartable was found on 1.31% of new episodes in May, growing 2.11% from last month.

Of these, 34.28% had 2 other trackers, 22.25% had one other tracker, 7.49% had 4 other trackers, 7.13% had 3 other trackers, 3.40% had 5 other trackers, 2.36% had 6 other trackers, 0.24% had 7 other trackers, and 0.02% had 8 other trackers.

54.24% also included Podsights, 51.12% also included Podtrac, 20.45% also included Podscribe, 10.66% also included Spotify, 10.14% also included Swap.fm, 9.75% also included Magellan AI, 4.41% also included Claritas, 2.77% also included Podroll, 2.40% also included Adswizz, 1.68% also included Podder, 1.52% also included Veritonic, 1.16% also included ArtsAI, 1.09% also included Gumshoe, 0.90% also included Podcorn, 0.90% also included Audiotakes, 0.78% also included OP3, 0.44% also included CoHost Prefix, 0.37% also included United Podcasters, 0.18% also included Blubrry, 0.14% also included Feedpress, 0.05% also included Firstory, 0.02% also included Zencastr, 0.02% also included Podkite, and 0.01% also included AdBarker.

For episodes that used Chartable, here are the top underlying podcast hosts:

1. Megaphone 85.26%
2. Simplecast 3.80%
3. Soundcloud 3.08%
4. Google Cloud 0.53%
5. Fireside 0.50%
6. Spreaker 0.50%
7. Futuri Media 0.38%
8. Triton Digital 0.30%
9. WideOrbit 0.29%
10. Squarespace 0.23%

7. Magellan AI

Magellan AI was found on 0.95% of new episodes in May, growing 5.92% from last month.

Of these, 29.86% had 3 other trackers, 17.58% had 4 other trackers, 9.85% had 5 other trackers, 7.00% had 2 other trackers, 5.98% had 6 other trackers, 5.54% had one other tracker, 2.37% had 7 other trackers, and 0.13% had 8 other trackers.

71.61% also included Podscribe, 38.18% also included Adswizz, 33.39% also included Audiotakes, 29.22% also included Podtrac, 28.92% also included Podsights, 19.40% also included Claritas, 13.70% also included Spotify, 13.39% also included Chartable, 11.31% also included ArtsAI, 8.42% also included Swap.fm, 5.43% also included Veritonic, 4.21% also included Podroll, 2.37% also included Podder, 1.27% also included Gumshoe, 0.82% also included OP3, 0.28% also included United Podcasters, 0.17% also included Blubrry, 0.08% also included Podcorn, and 0.02% also included CoHost Prefix.

For episodes that used Magellan AI, here are the top underlying podcast hosts:

1. Simplecast 35.13%
2. Megaphone 23.38%
3. ART19 13.15%
4. Omny Studio 7.66%
5. Triton Digital 6.79%
6. Libsyn 4.36%
7. Spreaker 3.34%
8. WNYC 2.55%
9. American Public Media 1.45%
10. RedCircle 1.09%

8. Podcorn by Audacy/Entercom

Podcorn was found on 0.64% of new episodes in May, shrinking 5.84% from last month.

Of these, 11.96% had one other tracker, 6.46% had 2 other trackers, 6.16% had 5 other trackers, 2.73% had 4 other trackers, 1.87% had 3 other trackers, 0.83% had 6 other trackers, 0.11% had 8 other trackers, and 0.07% had 7 other trackers.

25.45% also included Podtrac, 12.23% also included OP3, 12.02% also included Podscribe, 11.20% also included Podsights, 8.02% also included Gumshoe, 2.16% also included Podroll, 1.84% also included Chartable, 1.47% also included Spotify, 1.35% also included Podder, 1.11% also included Adswizz, 0.64% also included Blubrry, 0.21% also included Swap.fm, 0.18% also included United Podcasters, 0.16% also included AdBarker, 0.12% also included Feedpress, 0.11% also included Magellan AI, 0.07% also included Podkite, 0.06% also included CoHost Prefix, 0.05% also included Zencastr, and 0.04% also included Audiotakes.

For episodes that used Podcorn, here are the top underlying podcast hosts:

1. Buzzsprout 22.09%
2. Podomatic 12.77%
3. Libsyn 11.96%
4. Transistor 11.13%
5. Podbean 7.79%
6. Captivate 6.95%
7. Spreaker 6.19%
8. WideOrbit 4.14%
9. Megaphone 3.08%
10. Podhome 2.33%

9. Spotify Ad Analytics

Spotify was found on 0.46% of new episodes in May, growing 5.46% from last month.

Of these, 31.55% had 2 other trackers, 14.79% had 4 other trackers, 9.05% had 5 other trackers, 8.86% had 6 other trackers, 7.77% had 3 other trackers, 7.73% had one other tracker, 4.20% had 7 other trackers, and 0.33% had 8 other trackers.

61.63% also included Podtrac, 55.78% also included Podscribe, 30.37% also included Chartable, 28.43% also included Magellan AI, 26.24% also included Claritas, 17.90% also included ArtsAI, 17.87% also included Podsights, 15.36% also included Adswizz, 9.88% also included Audiotakes, 5.08% also included Veritonic, 3.39% also included Podroll, 3.15% also included Gumshoe, 2.39% also included Swap.fm, 2.17% also included OP3, 2.06% also included Podcorn, 1.33% also included Podder, 0.36% also included Blubrry, 0.32% also included United Podcasters, and 0.04% also included CoHost Prefix.

For episodes that used Spotify, here are the top underlying podcast hosts:

1. Megaphone 40.16%
2. Omny Studio 18.90%
3. Simplecast 14.32%
4. ART19 11.67%
5. Libsyn 3.61%
6. Audioboom 3.13%
7. Spreaker 2.86%
8. Transistor 1.64%
9. WNYC 1.25%
10. Buzzsprout 1.01%

10. Podroll

Podroll was found on 0.46% of new episodes in May, shrinking 5.04% from last month.

Of these, 72.78% had 2 other trackers, 7.74% had one other tracker, 6.63% had 4 other trackers, 3.86% had 3 other trackers, 3.56% had 6 other trackers, 2.33% had 5 other trackers, 0.76% had 7 other trackers, and 0.15% had 8 other trackers.

85.03% also included Podtrac, 77.07% also included Adswizz, 14.68% also included Podscribe, 11.25% also included Podsights, 8.77% also included Magellan AI, 7.91% also included Chartable, 5.95% also included Swap.fm, 4.57% also included Audiotakes, 3.99% also included Claritas, 3.40% also included Spotify, 3.03% also included Podcorn, 1.39% also included OP3, 0.96% also included ArtsAI, 0.91% also included Gumshoe, 0.84% also included United Podcasters, 0.47% also included Podder, 0.36% also included CoHost Prefix, and 0.35% also included Veritonic.

For episodes that used Podroll, here are the top underlying podcast hosts:

1. Simplecast 77.14%
2. Megaphone 12.01%
3. Spreaker 3.43%
4. Omny Studio 2.88%
5. PRX 1.74%
6. Transistor 0.94%
7. ART19 0.85%
8. Buzzsprout 0.38%
9. CoHost 0.26%
10. Podbean 0.20%

11. Audiotakes

Audiotakes was found on 0.40% of new episodes in May, shrinking 2.55% from last month.

Of these, 65.46% had 3 other trackers, 19.46% had 4 other trackers, 7.06% had 5 other trackers, 5.22% had 2 other trackers, 1.50% had 6 other trackers, 0.52% had one other tracker, and 0.14% had 7 other trackers.

99.09% also included Podscribe, 79.93% also included Magellan AI, 65.32% also included Adswizz, 23.16% also included Podsights, 22.39% also included Podtrac, 13.76% also included ArtsAI, 11.39% also included Spotify, 5.25% also included Podroll, 2.96% also included Chartable, 2.18% also included Swap.fm, 2.08% also included Veritonic, 1.09% also included Gumshoe, 0.91% also included Podder, 0.44% also included OP3, 0.35% also included United Podcasters, 0.13% also included Claritas, 0.06% also included Podcorn, and 0.03% also included Blubrry.

For episodes that used Audiotakes, here are the top underlying podcast hosts:

1. Simplecast 65.79%
2. Megaphone 13.66%
3. Audioboom 10.98%
4. Libsyn 3.88%
5. Omny Studio 2.72%
6. ART19 1.33%
7. Spreaker 0.76%
8. Captivate 0.44%
9. RedCircle 0.37%
10. Substack 0.07%

12. OP3 (the Open Podcast Prefix Project)

OP3 was found on 0.39% of new episodes in May, growing 15.57% from last month.

Of these, 19.66% had one other tracker, 10.31% had 5 other trackers, 8.53% had 2 other trackers, 3.66% had 4 other trackers, 3.23% had 3 other trackers, 1.51% had 6 other trackers, 0.53% had 7 other trackers, and 0.10% had 8 other trackers.

38.52% also included Podtrac, 19.99% also included Podcorn, 17.27% also included Podsights, 15.36% also included Podscribe, 14.15% also included Gumshoe, 4.65% also included Adswizz, 2.58% also included Chartable, 2.54% also included Spotify, 1.98% also included Magellan AI, 1.71% also included Blubrry, 1.71% also included Podder, 1.62% also included Podroll, 1.25% also included Swap.fm, 0.82% also included Claritas, 0.56% also included ArtsAI, 0.44% also included Audiotakes, 0.34% also included CoHost Prefix, 0.30% also included Podkite, 0.16% also included United Podcasters, 0.11% also included Feedpress, and 0.06% also included Zencastr.

For episodes that used OP3, here are the top underlying podcast hosts:

1. Transistor 23.41%
2. Amazon CloudFront 18.23%
3. Captivate 6.40%
4. Podhome 4.74%
5. Buzzsprout 4.45%
6. Houston Public Media 4.00%
7. Megaphone 3.37%
8. Spreaker 2.94%
9. Simplecast 2.66%
10. SoundStack 1.64%

13. Swap.fm

Swap.fm was found on 0.33% of new episodes in May, growing 10.09% from last month.

Of these, 27.73% had 2 other trackers, 17.25% had 4 other trackers, 16.63% had 3 other trackers, 16.09% had one other tracker, 12.11% had 5 other trackers, 1.85% had 6 other trackers, 1.50% had 7 other trackers, and 0.09% had 8 other trackers.

58.99% also included Podtrac, 49.84% also included Podsights, 40.58% also included Chartable, 39.82% also included Podscribe, 24.54% also included Magellan AI, 22.20% also included Adswizz, 9.95% also included ArtsAI, 8.33% also included Podroll, 6.33% also included Claritas, 3.36% also included Spotify, 2.66% also included Audiotakes, 1.50% also included OP3, 1.41% also included United Podcasters, 1.33% also included Gumshoe, 0.91% also included Blubrry, 0.67% also included Veritonic, 0.41% also included Podcorn, 0.34% also included Podder, and 0.03% also included Zencastr.

For episodes that used Swap.fm, here are the top underlying podcast hosts:

1. Megaphone 57.71%
2. Simplecast 22.20%
3. Omny Studio 9.52%
4. ART19 5.69%
5. PRX 4.55%
6. WNYC 0.17%
7. Transistor 0.14%
8. Audioboom 0.02%

14. Claritas

Claritas was found on 0.24% of new episodes in May, growing 0.80% from last month.

Of these, 30.73% had 4 other trackers, 23.74% had 5 other trackers, 21.47% had 6 other trackers, 9.00% had 7 other trackers, 8.33% had 3 other trackers, 3.75% had 2 other trackers, 1.53% had one other tracker, and 0.52% had 8 other trackers.

96.54% also included Podscribe, 78.26% also included Magellan AI, 66.24% also included Podtrac, 51.01% also included Spotify, 49.18% also included Podsights, 40.37% also included ArtsAI, 26.29% also included Adswizz, 24.41% also included Chartable, 17.87% also included Veritonic, 8.76% also included Swap.fm, 7.73% also included Podroll, 1.57% also included Podder, 1.36% also included OP3, 0.93% also included Gumshoe, 0.52% also included CoHost Prefix, 0.38% also included United Podcasters, and 0.21% also included Audiotakes.

For episodes that used Claritas, here are the top underlying podcast hosts:

1. Megaphone 38.20%
2. Simplecast 26.15%
3. ART19 22.21%
4. Libsyn 6.94%
5. Omny Studio 5.42%
6. Spreaker 0.21%
7. Buzzsprout 0.21%
8. Substack 0.19%
9. SoundStack 0.17%
10. Podbean 0.14%

15. Podder

Podder was found on 0.22% of new episodes in May, shrinking 32.22% from last month.

Of these, 16.25% had 2 other trackers, 12.11% had one other tracker, 8.02% had 3 other trackers, 6.85% had 4 other trackers, 3.76% had 5 other trackers, 0.89% had 6 other trackers, and 0.18% had 8 other trackers.

30.05% also included Podtrac, 24.28% also included Podscribe, 16.56% also included Podsights, 12.01% also included Adswizz, 10.25% also included Magellan AI, 9.97% also included Chartable, 3.94% also included Podcorn, 3.04% also included OP3, 2.76% also included Spotify, 1.69% also included Claritas, 1.64% also included Audiotakes, 1.53% also included Gumshoe, 1.33% also included Blubrry, 0.97% also included Podroll, 0.59% also included ArtsAI, 0.51% also included Swap.fm, 0.28% also included United Podcasters, 0.18% also included CoHost Prefix, and 0.10% also included Podkite.

For episodes that used Podder, here are the top underlying podcast hosts:

1. Omny Studio 44.29%
2. Megaphone 17.81%
3. Simplecast 12.88%
4. Spreaker 8.36%
5. Transistor 3.58%
6. ART19 3.58%
7. Buzzsprout 3.50%
8. Captivate 2.96%
9. Blubrry 0.77%
10. Podbean 0.72%

16. ArtsAI

ArtsAI was found on 0.20% of new episodes in May, growing 1.12% from last month.

Of these, 36.27% had 4 other trackers, 23.95% had 5 other trackers, 10.70% had 7 other trackers, 8.92% had 6 other trackers, 8.89% had 2 other trackers, 7.62% had 3 other trackers, 2.86% had one other tracker, and 0.63% had 8 other trackers.

91.89% also included Podscribe, 61.80% also included Podtrac, 55.19% also included Magellan AI, 50.40% also included Podsights, 48.82% also included Claritas, 42.07% also included Spotify, 28.04% also included Audiotakes, 17.80% also included Adswizz, 16.65% also included Swap.fm, 16.07% also included Veritonic, 7.76% also included Chartable, 2.25% also included Podroll, 1.13% also included OP3, 0.66% also included Podder, 0.46% also included United Podcasters, 0.32% also included Blubrry, 0.26% also included Gumshoe, and 0.20% also included CoHost Prefix.

For episodes that used ArtsAI, here are the top underlying podcast hosts:

1. Megaphone 29.60%
2. ART19 27.58%
3. Simplecast 17.66%
4. Omny Studio 13.04%
5. Audioboom 9.09%
6. Libsyn 2.31%
7. Spreaker 0.26%
8. SoundStack 0.20%
9. Substack 0.14%
10. Buzzsprout 0.12%

17. Feedpress

Feedpress was found on 0.13% of new episodes in May, shrinking 0.75% from last month.

Of these, 19.43% had one other tracker, and 1.42% had 2 other trackers.

14.29% also included Blubrry, 4.20% also included Podtrac, 1.42% also included Podsights, 1.42% also included Chartable, 0.60% also included Podcorn, and 0.34% also included OP3.

For episodes that used Feedpress, here are the top underlying podcast hosts:

1. Feedpress 55.21%
2. Libsyn 10.77%
3. Blubrry 6.05%
4. NPR 4.38%
5. Spotify for Creators 3.00%
6. Megaphone 2.92%
7. RSS.com 2.57%
8. Podbean 1.67%
9. iVoox 1.50%
10. Spreaker 1.29%

18. Gumshoe

Gumshoe was found on 0.12% of new episodes in May, shrinking 5.06% from last month.

Of these, 33.24% had 5 other trackers, 14.64% had 4 other trackers, 14.45% had one other tracker, 9.20% had 2 other trackers, 7.08% had 3 other trackers, 5.54% had 6 other trackers, 1.35% had 7 other trackers, and 0.34% had 8 other trackers.

58.38% also included Podtrac, 58.04% also included Podsights, 58.04% also included Podscribe, 47.50% also included OP3, 44.03% also included Podcorn, 12.38% also included Spotify, 12.19% also included Chartable, 10.36% also included Magellan AI, 3.71% also included Audiotakes, 3.71% also included Swap.fm, 3.56% also included Podroll, 2.89% also included Podder, 2.55% also included CoHost Prefix, 2.22% also included Adswizz, 1.88% also included Claritas, 1.54% also included Veritonic, 0.82% also included United Podcasters, and 0.43% also included ArtsAI.

For episodes that used Gumshoe, here are the top underlying podcast hosts:

1. Transistor 49.23%
2. Megaphone 22.01%
3. ART19 20.38%
4. Spreaker 2.94%
5. Simplecast 2.55%
6. RedCircle 1.73%
7. Omny Studio 0.58%
8. Audioboom 0.19%
9. Podbean 0.19%
10. Buzzsprout 0.10%

19. Veritonic

Veritonic was found on 0.07% of new episodes in May, shrinking 13.08% from last month.

Of these, 29.00% had 7 other trackers, 27.24% had 6 other trackers, 19.53% had 5 other trackers, 12.41% had 3 other trackers, 5.03% had 4 other trackers, 1.84% had 8 other trackers, 0.75% had 2 other trackers, and 0.34% had one other tracker.

84.66% also included Podscribe, 80.39% also included Podsights, 78.54% also included Podtrac, 76.95% also included Magellan AI, 62.78% also included Claritas, 46.69% also included ArtsAI, 34.70% also included Spotify, 29.59% also included Chartable, 22.13% also included Adswizz, 12.32% also included Audiotakes, 3.27% also included Swap.fm, 2.68% also included Gumshoe, 2.35% also included Podroll, 0.50% also included United Podcasters, 0.34% also included CoHost Prefix, and 0.17% also included Blubrry.

For episodes that used Veritonic, here are the top underlying podcast hosts:

1. Megaphone 67.81%
2. Simplecast 21.96%
3. Omny Studio 3.52%
4. ART19 3.02%
5. Audioboom 2.10%
6. Libsyn 0.42%
7. Buzzsprout 0.34%
8. Podbean 0.34%
9. Soundcloud 0.25%
10. This American Life 0.08%

20. RSS Insight

RSS Insight was found on 0.05% of new episodes in May, growing 54.19% from last month.

For episodes that used RSS Insight, here are the top underlying podcast hosts:

1. Akamai CDN 100.00%

21. Firstory

Firstory was found on 0.04% of new episodes in May, shrinking 2.98% from last month.

Of these, 1.54% had one other tracker.

1.54% also included Chartable.

For episodes that used Firstory, here are the top underlying podcast hosts:

1. SoundOn 99.72%
2. Soundcloud 0.28%

22. Médiamétrie

Médiamétrie was found on 0.02% of new episodes in May, growing 22.35% from last month.

Of these, 8.94% had one other tracker.

8.94% also included Podtrac.

For episodes that used Médiamétrie, here are the top underlying podcast hosts:

1. Ausha 100.00%

23. United Podcasters

United Podcasters was found on 0.02% of new episodes in May, growing 8.08% from last month.

Of these, 29.20% had one other tracker, 20.80% had 3 other trackers, 14.60% had 4 other trackers, 11.68% had 6 other trackers, 8.39% had 5 other trackers, 4.38% had 2 other trackers, 1.82% had 8 other trackers, and 0.36% had 7 other trackers.

41.61% also included Podscribe, 40.51% also included Podtrac, 38.69% also included Podsights, 31.39% also included Chartable, 29.93% also included Swap.fm, 24.82% also included Podroll, 17.15% also included Magellan AI, 9.49% also included Spotify, 9.49% also included Adswizz, 9.12% also included Audiotakes, 7.30% also included Podcorn, 6.20% also included Gumshoe, 5.84% also included ArtsAI, 5.84% also included Claritas, 4.01% also included Podder, 4.01% also included OP3, 2.19% also included Veritonic, and 0.36% also included Zencastr.

For episodes that used United Podcasters, here are the top underlying podcast hosts:

1. Megaphone 51.09%
2. ART19 12.41%
3. PRX 9.12%
4. Simplecast 8.76%
5. Libsyn 7.30%
6. RedCircle 2.92%
7. Spreaker 2.55%
8. Podbean 2.19%
9. Spotify for Creators 1.82%
10. Acast 1.46%

24. CoHost Prefix

CoHost Prefix was found on 0.01% of new episodes in May, shrinking 6.98% from last month.

Of these, 25.73% had one other tracker, 19.50% had 5 other trackers, 19.09% had 4 other trackers, 7.88% had 2 other trackers, 2.90% had 6 other trackers, 2.90% had 8 other trackers, 1.66% had 3 other trackers, and 1.66% had 7 other trackers.

74.27% also included Podtrac, 45.23% also included Podsights, 44.40% also included Podscribe, 42.32% also included Chartable, 21.99% also included Gumshoe, 12.03% also included Podroll, 9.96% also included OP3, 9.13% also included Claritas, 2.90% also included Podcorn, 2.90% also included Podder, 2.90% also included ArtsAI, 1.66% also included Magellan AI, 1.66% also included Veritonic, and 1.24% also included Spotify.

For episodes that used CoHost Prefix, here are the top underlying podcast hosts:

1. Megaphone 45.64%
2. Omny Studio 13.69%
3. Buzzsprout 9.54%
4. Captivate 6.22%
5. RedCircle 5.81%
6. Podbean 4.98%
7. Transistor 4.56%
8. Simplecast 2.49%
9. Spreaker 1.66%
10. ART19 1.24%

25. Podkite

Podkite was found on 0.01% of new episodes in May, growing 1.05% from last month.

Of these, 30.38% had one other tracker, 2.53% had 2 other trackers, 2.53% had 4 other trackers, and 2.53% had 5 other trackers.

21.52% also included Podtrac, 13.29% also included OP3, 5.70% also included Blubrry, 5.06% also included Podcorn, 5.06% also included Podsights, 2.53% also included Podscribe, 2.53% also included Chartable, and 2.53% also included Podder.

For episodes that used Podkite, here are the top underlying podcast hosts:

1. Buzzsprout 21.52%
2. Captivate 16.46%
3. Transistor 15.19%
4. Podbean 14.56%
5. Megaphone 8.23%
6. Pinecast 5.70%
7. Blubrry 5.70%
8. Simplecast 5.70%
9. Fireside 5.06%
10. Castos 1.27%

26. AdBarker

AdBarker was found on <0.01% of new episodes in May, growing 19.39% from last month.

Of these, 22.50% had 3 other trackers, and 15.00% had one other tracker.

35.00% also included Podtrac, 22.50% also included Podscribe, 22.50% also included Podcorn, and 2.50% also included Chartable.

For episodes that used AdBarker, here are the top underlying podcast hosts:

1. Libsyn 46.25%
2. AdBarker 18.75%
3. Captivate 11.25%
4. Buzzsprout 10.00%
5. Fireside 6.25%
6. Simplecast 5.00%
7. Megaphone 2.50%

27. Zencastr

Zencastr was found on <0.01% of new episodes in May, shrinking 13.82% from last month.

Of these, 12.99% had one other tracker, 5.19% had 2 other trackers, 1.30% had 6 other trackers, and 1.30% had 7 other trackers.

11.69% also included Podtrac, 7.79% also included Podcorn, 6.49% also included Chartable, 5.19% also included OP3, 2.60% also included Podscribe, 2.60% also included Swap.fm, 2.60% also included Podsights, and 1.30% also included United Podcasters.

For episodes that used Zencastr, here are the top underlying podcast hosts:

1. Buzzsprout 27.27%
2. Podbean 16.88%
3. RSS.com 15.58%
4. Pinecast 11.69%
5. Spreaker 9.09%
6. Simplecast 9.09%
7. Megaphone 6.49%
8. PodServe.fm 2.60%
9. Soundcloud 1.30%

Analysis by John Spurlock

Thanks to the Podcast Index and other sources, for giving us signals of when to check for new episodes in public podcasts.

And thanks to the Open Podcast Analytics Working Group for maintaining a list of media url patterns and analytics services patterns. We’ve incorporated these patterns along with some of our own to come up with the host and analytics service identification and metadata for this ranking.

Updated 2025-06-01, with data for the month of May 2025.

Updated 2025-05-01, with data for the month of April 2025.

Updated 2025-04-05, with data for the month of March 2025.

Updated 2025-03-01, with data for the month of February 2025.

Updated 2025-02-03, with data for the month of January 2025.

Updated 2025-01-02, with data for the month of December 2024.

Updated 2024-12-01, with data for the month of November 2024.

Updated 2024-11-06, with data for the month of October 2024.

Updated 2024-10-01, with data for the month of September 2024.

Updated 2024-09-01, with data for the month of August 2024.

Updated 2024-08-01, with data for the month of July 2024.

Updated 2024-07-01, with data for the month of June 2024.

Updated 2024-06-01, with data for the month of May 2024.

Updated 2024-05-01, with data for the month of April 2024.

Updated 2024-04-01, with data for the month of March 2024.

Updated 2024-03-02, with data for the month of February 2024.

Updated 2024-02-02, with data for the month of January 2024.

Updated 2024-01-01, with data for the month of December 2023.

Updated 2023-12-03, with data for the month of November 2023.

Updated 2023-11-02, with data for the month of October 2023. Improved accuracy in observing Spotify for Creators podcasts: more S4C new episodes leads to lower share of prefixed episodes overall.

Updated 2023-10-01, with data for the month of September 2023. Improved accuracy in observing Spotify for Creators podcasts: more S4C new episodes leads to lower share of prefixed episodes overall.

Updated 2023-09-01, with data for the month of August 2023.

Updated 2023-08-01, with data for the month of July 2023.

Updated 2023-07-01, with data for the month of June 2023. Includes new Spotify Ad Analytics prefix launched in June.

Updated 2023-06-01, with data for the month of May 2023.

Updated 2023-05-04, with data for the month of April 2023.

Updated 2023-04-01, with data for the month of March 2023.

Updated 2023-03-01, with data for the month of February 2023.

Updated 2023-02-01, with data for the month of January 2023.

Updated 2023-01-01, with data for the month of December 2022.

Updated 2022-12-01, with data for the month of November 2022.

Updated 2022-11-02, with data for the month of October 2022.

Updated 2022-10-03, with data for the month of September 2022.

Updated 2022-09-01, with data for the month of August 2022.

Updated 2022-08-01, with data for the month of July 2022.

Updated 2022-07-01, with data for the month of June 2022.

Updated 2022-06-01, with data for the month of May 2022.

Updated 2022-05-01, with data for the month of April 2022.

Updated 2022-04-05, RSS Podcasting is now known as RSS.com.

Updated 2022-04-03, with data for the month of March 2022 and a new graph.

Updated 2022-03-03, with data for the month of February 2022, added AdBarker.

Updated 2022-02-19, added new overall breakdowns of how many new episodes use at least one tracker, and how many use at least one Spotify-owned tracker.

Updated 2022-02-08, with data for the month of January 2022.

Updated 2022-01-10, was missing data for December 31, now fixed.

Updated 2022-01-07, with data for the month of December 2021.

Updated 2021-12-04, with data for the month of November 2021.

Updated 2021-11-18, added Backtracks.

Updated 2021-11-14, with data for the month of October 2021.

Updated 2021-10-21: Added Adswizz and tweaked the host identification to choose the last known host in the redirect chain instead of the first, in an attempt to better capture customer-driven host migrations.

Updated 2021-10-14: Added a section about how direct server-to-server analytics integrations are not publically visible, and thus out of scope.

Updated 2021-10-13: Removed Podtrac as a host under itself, even when it is the last media file url in the redirect chain.

Previous versions:

• Podcast Tracker Rankings by Episode Share (April 2025)
• Podcast Tracker Rankings by Episode Share (March 2025)
• Podcast Tracker Rankings by Episode Share (February 2025)
• Podcast Tracker Rankings by Episode Share (January 2025)
• Podcast Tracker Rankings by Episode Share (December 2024)
• Podcast Tracker Rankings by Episode Share (November 2024)
• Podcast Tracker Rankings by Episode Share (October 2024)
• Podcast Tracker Rankings by Episode Share (September 2024)
• Podcast Tracker Rankings by Episode Share (August 2024)
• Podcast Tracker Rankings by Episode Share (July 2024)
• Podcast Tracker Rankings by Episode Share (June 2024)
• Podcast Tracker Rankings by Episode Share (May 2024)
• Podcast Tracker Rankings by Episode Share (April 2024)
• Podcast Tracker Rankings by Episode Share (March 2024)
• Podcast Tracker Rankings by Episode Share (February 2024)
• Podcast Tracker Rankings by Episode Share (January 2024)
• Podcast Tracker Rankings by Episode Share (December 2023)
• Podcast Tracker Rankings by Episode Share (November 2023)
• Podcast Tracker Rankings by Episode Share (October 2023)
• Podcast Tracker Rankings by Episode Share (September 2023)
• Podcast Tracker Rankings by Episode Share (August 2023)
• Podcast Tracker Rankings by Episode Share (July 2023)
• Podcast Tracker Rankings by Episode Share (June 2023)
• Podcast Tracker Rankings by Episode Share (May 2023)
• Podcast Tracker Rankings by Episode Share (April 2023)
• Podcast Tracker Rankings by Episode Share (March 2023)
• Podcast Tracker Rankings by Episode Share (February 2023)
• Podcast Tracker Rankings by Episode Share (January 2023)
• Podcast Tracker Rankings by Episode Share (December 2022)
• Podcast Tracker Rankings by Episode Share (November 2022)
• Podcast Tracker Rankings by Episode Share (October 2022)
• Podcast Tracker Rankings by Episode Share (September 2022)
• Podcast Tracker Rankings by Episode Share (August 2022)
• Podcast Tracker Rankings by Episode Share (July 2022)
• Podcast Tracker Rankings by Episode Share (June 2022)
• Podcast Tracker Rankings by Episode Share (May 2022)
• Podcast Tracker Rankings by Episode Share (April 2022)
• Podcast Tracker Rankings by Episode Share (March 2022)
• Podcast Tracker Rankings by Episode Share (February 2022)
• Podcast Tracker Rankings by Episode Share (January 2022)
• Podcast Tracker Rankings by Episode Share (December 2021)
• Podcast Tracker Rankings by Episode Share (November 2021)
• Podcast Tracker Rankings by Episode Share (October 2021)
• Podcast Tracker Rankings by Episode Share (September 2021)

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