How to Get Your Audiobook on Chirp (BookBub)

Chirp is BookBub's audiobook retailer, where listeners buy audiobooks at deep discounts with no subscription. You cannot upload directly — Chirp pulls its catalogue from distribution partners. Distribute your finished audiobook through a Chirp partner and enable Chirp as a channel to qualify for listings and featured deals. For an AI-narrated file, the realistic route is Author's Republic.

Chirp matters for indie authors because it taps BookBub's audience of deal-seeking readers who buy audiobooks outright rather than borrowing them through a subscription. A featured Chirp deal places an audiobook in front of millions of BookBub subscribers at a steep discount, which can drive a large spike of sales in a single day. For authors building an audiobook catalogue, Chirp is one of the few discovery channels where price-sensitive listeners actively go looking for new titles to buy.

What is Chirp and who owns it?

Chirp is an audiobook store owned by BookBub, the book-promotion company best known for its daily ebook deals email. Chirp sells audiobooks à la carte — listeners pay once and own the file, with no monthly membership required. This à-la-carte model differs from Audible's subscription credits and appeals to listeners who want to buy specific titles at a discount rather than commit to a recurring fee.

Chirp's defining feature is the discounted deal. BookBub curates limited-time audiobook deals and promotes them through the Chirp app and a dedicated deals email, often pricing titles between $0.99 and $4.99 for a short window. Because BookBub has spent years building an audience of readers who open deal emails specifically to find cheap books, a Chirp deal reaches buyers who are already primed to purchase, which is why it can drive far higher daily volume than a standard storefront listing.

How does an audiobook get onto Chirp?

An audiobook gets onto Chirp through a distribution partner, not through a direct upload. Chirp does not operate a self-publishing portal where authors submit files themselves; it is fed by aggregators and distributors that opt titles into Chirp on the author's behalf. Several services list to Chirp, but the right one depends on how your audiobook was produced — and that is where AI-narrated titles need care.

For an externally produced AI audiobook — a finished file you generated outside the platform, such as a TomeVox deliverable — the realistic route is Author's Republic. Author's Republic explicitly accepts third-party AI narration and is a Chirp distribution partner, so it is the conduit that gets an external AI file in front of Chirp. Importantly, INaudio (formerly Findaway Voices) is not a route for an external AI file: INaudio accepts AI narration only when it was produced via Google Play Books, ElevenLabs, or Spoken Press, and rejects modified or externally produced AI audio. Routing a TomeVox file through INaudio to reach Chirp will not work.

The practical sequence is straightforward. First, you need a finished, distribution-ready audiobook — an M4B file with chapter markers plus per-chapter MP3 files meeting professional audio specifications. Then you create an Author's Republic account, upload the audiobook, disclose the AI/digital-voice narration in the metadata, and enable Chirp among the distribution channels. After the title is reviewed and approved, it appears in the Chirp catalogue and becomes eligible for both standard listing and featured deals. For a fuller picture of how wide distribution works, see the guide on where to sell an AI-narrated audiobook.

What is the difference between a Chirp listing and a Chirp deal?

A standard Chirp listing and a featured Chirp deal are two different things, and the distinction matters for planning. A standard Chirp listing happens automatically once your audiobook is live with a Chirp distribution partner (such as Author's Republic) with Chirp enabled — your title is buyable on Chirp at its regular price, but it is not actively promoted. A featured Chirp deal is a curated, time-limited promotion where BookBub discounts your audiobook and pushes it through the Chirp deals email to a large segment of subscribers.

The featured deal is the high-impact opportunity, and it is applied for and scheduled separately rather than granted automatically. Securing a featured Chirp deal involves submitting your title for consideration, agreeing to a promotional discount, and timing the deal to your launch or marketing calendar. The tactical mechanics of getting accepted — eligibility, discount pricing rules, timing, and optimisation — are covered in the dedicated walkthrough on how to submit your audiobook for a Chirp deal.

The key takeaway from the comparison above is that distributing through a Chirp partner gets you a standard Chirp listing for free, while the sales-driving featured deal is a separate, competitive promotion you have to apply for and pay for through a discount. Both depend on the same prerequisite: a finished audiobook already live with a distribution partner that feeds Chirp.

Does Chirp accept AI-narrated audiobooks?

Chirp itself has no separate policy that blocks synthetic-voice audiobooks — the constraint is the distribution partner you route through. Author's Republic accepts third-party AI narration, so a correctly disclosed AI title distributed through Author's Republic is eligible for Chirp listing and deals on the same terms as a human-narrated title. The one common mistake to avoid: do not try to reach Chirp via INaudio with an externally produced AI file. INaudio accepts AI narration only when it was generated via Google Play Books, ElevenLabs, or Spoken Press, and rejects modified or external AI audio — so it will not carry a TomeVox file to Chirp. The growing acceptance of AI narration across retailers is covered in more depth in the piece on whether listeners care about AI narration.

The practical requirement is quality and disclosure, plus choosing an AI-friendly conduit. An AI-narrated audiobook headed for Chirp must meet the same professional audio specifications as any other audiobook — 44.1 kHz sample rate, 192 kbps or higher MP3, peak no higher than -3 dBFS, and a low noise floor — and the AI/digital-voice narration must be disclosed accurately when you distribute through Author's Republic. Files that fail these specs or omit the disclosure are the ones that run into trouble, regardless of whether a human or an AI voice produced them.

Why does Chirp drive discovery for indie authors?

Chirp drives discovery because its audience comes to the platform specifically to find audiobooks to buy at a discount. Unlike a subscription service, where a listener's monthly fee covers whatever they happen to play, Chirp listeners make a deliberate purchase decision for each title. For an indie author, this means a Chirp buyer is a genuine sale and often a new reader who discovered the book through a deal rather than an existing fan. That discovery effect is hard to replicate on platforms where browsing is dominated by big-publisher catalogues.

Chirp also pairs well with a wide-distribution strategy rather than an exclusive one. Because reaching Chirp means distributing through a partner like Author's Republic, authors who choose Chirp are typically going wide at the same time — uploading directly to Google Play Books and Kobo, and reaching Apple Books and Spotify through an AI-friendly aggregator. This is the opposite of the exclusive route through ACX, where a title is locked to Audible for years; the trade-offs between the two approaches are laid out in the comparison of ACX versus AI audiobook production. For most indie authors building a catalogue, the wide route that includes Chirp keeps more options open.

What do you need before you can list on Chirp?

Before you can list on Chirp, you need a finished audiobook in distribution-ready formats. A Chirp distribution partner such as Author's Republic — and therefore Chirp — expects an M4B file with chapter markers plus per-chapter MP3 files that meet professional audio specifications, along with square cover art and accurate metadata that discloses AI/digital-voice narration. Without a produced audiobook in hand, there is nothing to distribute, so production is the real first step on the path to Chirp.

Production speed and cost shape this decision. Traditional human narration can take 6–12 weeks and cost $3,000–$8,000 per title, which makes it hard to justify chasing discount-driven Chirp deals. AI audiobook production through TomeVox delivers a distribution-ready M4B plus per-chapter MP3 files within 48 hours, at early bird pricing of $49–$99 depending on length, with full commercial distribution rights and no exclusivity, so you can distribute through Author's Republic to Chirp and go wide elsewhere. For a complete walkthrough from manuscript to finished files, see the AI audiobook production guide, and for a cost breakdown see how much it costs to make an audiobook.