- ABC Publishing
- Ascent Audio
- Atria Books/Beyond Words
- Authors Republic
- Balzer + Bray
- Beacon Press
- Berrett-Koehler Publishers
- Big Finish Productions
- Biography In Sound
- Blackstone Audiobooks
- BN Publishing
- BookBox
- Books Should Be Free
- Bookwire
- Brilliance Audio
- Broken Sea
- Caedmon
- Christianaudio.com
- Common Sense Atheism
- Darker Projects
- Dreamscape Media
- Dreamscape Media,LLC
- Ejunto
- Escape Pod
- Fate Core System
- Findaway Voices
- G&D Media
- GraphicAudio
- Hachette Book Group USA
- HarlequinAudio
- HarperAudio
- HarperCollins
- HarperCollins Leadership
- HarperCollins Publishers
- HarperCollins Publishers UK
- HarperStudio
- HarperTeen
- HighBridge Company
- HuffDuffer
- Internet Archive
- Katherine Tegen Books
- Learn25
- LibriVox
- Listening Library (Audio)
- Little Brown Book Group UK
- LLC
- Macmillan Audio
- Naxos Audiobooks
- New World Library
- Novel Audio
- Oasis Audio
- Pan Macmillan
- Pear Press
- Penguin Audio
- Penguin Books LTD
- Random House (Audio)
- Random House Canada
- Recorded Books
- Scholastic Inc.
- Simon & Schuster Audio
- Simon & Schuster Audio UK
- Speak the Speech
- Tantor Media
- The Jim Moran Foundation
- Thomas Nelson
- Thought Audio
- Twerp Online
- Twilight Zone Radio Media
- W.F. Howes
- Wavesound Audiobooks
- Whole Story QUEST
- Zondervan Publishing Company