Podcast Host Rankings by Episode Share (December 2021)

One of the ways to measure the health of the current podcast ecosystem is to measure the number of new episodes published in a given period.

We looked at every single new podcast episode published (about 1.5 million in December 2021) and identified which podcast hosting company it belongs to.


We use the actual media file url (ignoring any non-host tracking redirects) to identify the host. It is not based on the feed url domain, which can often undercount hosts that offer custom domains.

In cases where a retail podcast host uses another podcast host to serve the audio, we credit the first host. In cases where a podcast migrates from one host to new host, we credit the new host. In general, the intent is to identify the podcast host the podcaster would say they are dealing with.


There are many market share numbers floating around out there for the various podcast hosting companies, but it’s often difficult to compare apples to apples - especially when considering inactive shows. Looking at only new episodes is one fairly objective way to compare each platform, at least by sheer amount of new output.

Below is the ranking of podcast hosters ordered by new episodes published during the month of December 2021.

A percentage of episode share is also included if > 0%.


  1. Anchor 24.4%
  2. Buzzsprout 9.5%
  3. Spreaker 7.0%
  4. Libsyn 5.1%
  5. Soundcloud 4.9%
  6. Podbean 4.8%
  7. Omny Studio 4.3%
  8. iVoox 2.9%
  9. Megaphone 2.2%
  10. Captivate 2.1%
  11. Simplecast 1.7%
  12. Triton Digital 1.6%
  13. Blubrry 1.3%
  14. Acast 1.3%
  15. RSS Podcasting 1.3%
  16. Transistor 1.2%
  17. Akamai CDN 1.1%
  18. SermonAudio 1.1%
  19. Audioboom 1.0%
  20. Amazon S3
  21. PromoDJ
  22. Radio France
  23. Podigee
  24. ART19
  25. Squarespace
  26. Audiostart
  27. SoundOn
  28. Ximalaya
  29. RedCircle
  30. Google Cloud
  31. Podtrac
  32. Podomatic
  33. Whooshkaa
  34. Subsplash
  35. StreamGuys
  36. Voice of America English News
  37. NPR
  38. Castbox
  39. Radiotalk
  40. RTVE
  41. Amazon CloudFront
  42. iono.fm
  43. Futuri Media
  44. Internet Archive
  45. Castos
  46. BBC
  47. Deutschlandradio
  48. podcaster.de
  49. WideOrbit
  50. Nox Solutions
  51. Sveriges Radio
  52. Radio Free Europe and Radio Liberty
  53. Audiomeans
  54. Blog Talk Radio
  55. Pinecast
  56. Kabbalah Media
  57. Adventist World Radio
  58. Rackspace Storage
  59. OnePlace.com
  60. Wasabi Cloud Storage
  61. Podcast.co
  62. Atresmedia
  63. Streamakaci
  64. Sermon.net
  65. Feedpress
  66. Europe 1
  67. hearthis.at
  68. Sounder
  69. Fireside
  70. PodServe.fm
  71. Canstream Internet Radio
  72. Cesky rozhlas
  73. Nobex Partners
  74. lizhi.fm
  75. Chartable
  76. CBS Radio News
  77. Hubhopper
  78. RTP
  79. SRF
  80. Vatican News
  81. Aragon Radio CARTV
  82. Seesaa
  83. LIVEBOX
  84. WordPress
  85. Voxnest
  86. Substack
  87. COPE
  88. SpokenLayer
  89. mave
  90. LetsCast.fm
  91. Jewish Podcasts
  92. PodPoint
  93. Podspace
  94. DAR.fm
  95. CCMA
  96. ABC Australia
  97. LSM.lv
  98. Freecaster
  99. CacheFly CDN
  100. Sharpstream
  101. Kajabi
  102. DigitalOcean Spaces
  103. msk.ru
  104. bCast
  105. Podty
  106. Podcastics
  107. podcasts.com
  108. Microsoft Azure Blob Storage
  109. JustCast
  110. PodBoxx
  111. Zeno.FM
  112. Zencast
  113. Talkshoe
  114. RAC1
  115. PRX
  116. podCloud
  117. Enacast
  118. Flumotion
  119. Backblaze B2 Cloud Storage
  120. Podster.fm
  121. Adori Labs
  122. Lightcast
  123. Cast
  124. Hipcast
  125. Podetize
  126. Securenet Systems
  127. Dropbox
  128. Springcast
  129. WNYC
  130. (all others)
  131. BoxCast
  132. Djpod
  133. Octopus
  134. Cogeco Media
  135. Wistia
  136. Julep Hosting
  137. Play.ht
  138. DAX
  139. JW Player
  140. Soundwise
  141. Backtracks
  142. American Public Media
  143. ShoutEngine
  144. Ausha
  145. Megafono
  146. Typlog
  147. This Is Distorted
  148. AdBarker
  149. Podcorn
  150. Podbbang
  151. Supporting Cast
  152. Linode Object Storage
  153. Cuonda
  154. Casted
  155. Hello Audio
  156. Breaker
  157. PodCloud
  158. WavPub
  159. The Washington Post
  160. BackdoorPodcasts
  161. MediaFire File Storage
  162. Podsights
  163. Messy
  164. Podcast Your Sermons
  165. Graffiti Urban Radio

Analysis by John Spurlock

Thanks to the Podcast Index for crawling every podcast, and giving us a signal of when to check for new episodes.

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


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

Updated 2022-01-02, with data for the month of December 2021. Now filtering out episodes with the same media file url across multiple feeds (e.g. in aggregate category feeds), and filtered out dynamic search feeds from archive.org (they do not represent “shows” for any meaningful definition of the term). Universe shrank by 10.6% with these new filters. After that, December’s universe was still 6.8% smaller than November’s, presumably due to the holiday season.

Updated 2021-12-02, with data for the month of November 2021.

Updated 2021-11-11, tweaked the host identification algorithm: in cases where one known host performs a temporary redirect (302, 307) to another known host as part of a single request chain, we credit the redirecting host, not the target. For permanent redirects (301), we credit the target.

Updated 2021-11-11, added a new footer link to last month’s version.

Updated 2021-11-10, with data for the month of October 2021.

Updated 2021-10-09, to clarify the universe and identification scheme, added an overall episode count, and replaced short domains with hosting company names.


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