Overview

Authors can upload PDF, EPUB, or TXT files, paste text, or import a public URL. Audibloom detects narrator and character dialogue and assigns distinct voices, a practical advantage for dialogue-heavy books that need more than one reading voice. Chapters can be edited and rendered independently, so a revision can stay confined to the affected section.

Import processing is designed around book layouts. For PDFs, it removes repeated headers, footers, and page numbers and restores paragraph flow across page breaks. EPUB 2 and EPUB 3 imports preserve chapter order and the table of contents. Paid plans accept PDF uploads up to 100 MB.

Key features

Voice and chapter control

The multi-voice workspace makes Audibloom more suited to producing character-led books than a basic single-voice conversion tool. Free comes with six starter voices; Creator expands the selection to 20+ standard voices and includes multi-character narration. Author Pro adds voice cloning and a pronunciation dictionary; Studio includes three cloned voices.

Exports and rights

Current exports are MP3s organized by chapter. That works for creators who can use chapter files or package them separately, but anyone who needs a single chaptered M4B file will need another workflow: M4B packaging is planned, not currently available. Author Pro adds WAV chapters, and Per-book Pack provides an MP3 ZIP export. Paid plans include commercial distribution rights, with authors keeping 100% of royalties and no revenue share.

Pricing

The Free plan costs 0.00 USD per free, billed $0 forever. Its 5 minutes of generated audio per month, six starter voices, and watermarked MP3s make it a preview tier, not a realistic route to completing a book.

Creator costs 15.00 USD per month, billed $15/ month. It provides 2 hours/month, 20+ standard voices, no-watermark MP3, and multi-character narration. This is the entry paid plan for authors producing shorter titles or testing a workflow, but the monthly quota can constrain longer books.

Per-book Pack costs 29.00 USD per once, billed $29/ book. It includes up to 12 hours/book and MP3 ZIP export, with no subscription or monthly cap. It is the clearest fit for occasional releases; authors producing repeatedly may prefer a monthly plan, while those needing WAV or voice cloning will need Author Pro.

Author Pro costs 39.00 USD per month, billed $39/ month, for 10 hours/month, MP3 ZIP and WAV chapters, voice cloning, and a pronunciation dictionary. It suits authors who need those production controls and have recurring projects within the quota. Studio costs 99.00 USD per month, billed $99/ month, and raises the allowance to 30 hours/month; it also includes three cloned voices, five parallel books, a priority render queue, a dedicated Slack channel, and weekly office hours. That tier is aimed at small presses or higher-throughput teams. Author Pro includes standard email support.

There is no free trial. Paid tiers are monthly subscriptions except for the one-time Per-book Pack; compare the monthly audio allowance with the length and frequency of your projects before committing.

Platforms

Audibloom runs on the web, making it a fit for browser-based production rather than a dedicated mobile or desktop workflow.

Who it's for

Indie authors, KDP publishers, and small presses are the intended audience. It is strongest for creators who need distinct character voices, book-aware imports, and chapter-level revision. It is less suitable for anyone who requires chaptered M4B output now, or whose monthly production exceeds the chosen plan's allowance.

Pros and cons

Pros

Detects narrator and character dialogue for distinct voices, which supports full-cast-style narration.
Independent chapter editing and rendering keep revisions focused instead of requiring a full-book rerender.
PDF cleanup and EPUB structure preservation address formatting problems common in manuscript imports.
Paid plans grant commercial distribution rights without taking a share of royalties.
The one-time Per-book Pack avoids a subscription and has no monthly cap, up to 12 hours per book.

Cons

Only chapter-level MP3 export is currently available; chaptered M4B packaging remains planned.
The free tier's five minutes per month and watermarked downloads limit it to previewing.
Creator's two-hour monthly quota may not cover longer audiobook projects.
Studio's 99.00 USD per month price is a substantial step up for users who need its higher allowance and production support.

Alternatives

Browse AI Audiobook Generators to compare other tools in the category.

AudioPod AI is another freemium web option, also available on iOS and through an API, with a credits-based free tier for text-to-speech and music.
Bindery by Infinite Library is a web alternative with a free starting point, including a no-account tryout and watermarked proofs.
Musely Audiobook Generator offers a web-based free tier with daily text generations and multimedia credits, a different fit for users comparing generation limits.
StoryVox offers a free account measured in credits and one-time credit packs, an alternative for those who prefer credit purchases.
AudioBookByMe is a web alternative with a free audiobook conversion each month and a free trial of voice cloning.
Narrated Novels provides a free monthly character allowance and is also accessible by API.
BookHive is another web option with a free Writers plan, AI narration, and PDF, EPUB, and TXT support.
Castory is a web alternative with advertised free use.

Verdict

Audibloom is a strong choice for indie authors and small publishing teams who want multi-character narration, careful manuscript imports, and chapter-level control without giving up royalties. Choose it when MP3 chapter exports and the plan's audio allowance suit your publishing workflow; look elsewhere if chaptered M4B delivery is a requirement.

	Audibloom	Castory
Free plan	Yes	Yes
Free trial	No	No
Paid from	$15/mo	Free
Open source	No	No
Platforms	Web	Web
Free plan	Yes	Yes
Paid from	15 /mo	—
Chapter handling	Yes	Yes
Audiobook export	Yes	Yes
Voice cloning	Yes	—
Commercial rights	included	included

Audibloom vs Castory

Audibloom

Castory