Audiobooks
Free AI Narration Voices You Can Actually Sell Audiobooks With
Twenty-six free AI voice models checked for one thing: can you sell the audiobook you make with them? The safe list, the ones with strings attached, and the ones to leave alone.
You finally have the finished book. The audiobook quotes came back at four figures. And somewhere in your feed, someone said “just use a free AI voice.” Before you do, there is one question worth five minutes of your time.
Can you sell what it makes?
Plenty of free voice models sound wonderful. Quite a few of them are licensed for research or personal use only, which means the audiobook you spent a fortnight producing could be one you are not allowed to put on sale. Nobody tells you that on the demo page. It sits in a licence file most of us never open.
So we opened them. All twenty-six voice models used by today’s popular free audiobook tools, checked for one thing: whether an independent author can sell the result.
The short answer
About a third are clear for commercial audiobooks. Another third come with conditions you can live with if you know them. The rest are non-commercial, and a couple of the best-known names are in that last group.
One rule for every model below: only clone your own voice, or a voice you have written permission to use. Several licences demand it, the law in most places backs it up, and readers deserve to know who they are listening to.
Clear for commercial audiobooks
These carry permissive licences (Apache-2.0 or MIT) on the model itself, so the audio you make is yours to sell.
| Voice model | Why authors like it | What you need |
|---|---|---|
| MOSS-TTS | Built for long narration, 31 languages, voice cloning. | A graphics card; the large model can run in a low-memory mode on 8 GB. |
| Qwen3-TTS | Ten languages, nine ready-made voices, or clone your own from a few seconds of audio. | A graphics card. |
| Chatterbox | A fast English model and a 23-language model. Every file carries an inaudible watermark, which quietly marks it as AI-made. | Small models; a modest graphics card is plenty. |
| dots.tts | Some of the clearest English in its class. Its makers ask you to label the audio as AI-generated. | A graphics card with 6–10 GB. |
| ZONOS2 | Strong English and a mode designed for long-form reading. | An NVIDIA graphics card (a slower CPU version exists). |
| Kokoro | Fifty-four ready-made voices. No cloning, but it runs on an ordinary laptop with no graphics card at all. | Any modern computer. |
| AuK | Brand new from Tencent, with English and Chinese shown so far. | A powerful graphics card (around 25 GB). |
If you only try three, try MOSS-TTS, Qwen3-TTS and Chatterbox. If your computer has no graphics card, start with Kokoro.
Allowed, with strings attached
Higgs Audio V3
Its licence names audiobooks and lets you earn from them, which is lovely. The catch: every title has to carry a credit line to the company that made it. Some authors won’t mind. If you keep your credits page clean, look elsewhere.
IndexTTS2
Commercial use is allowed for anyone below a very large size threshold, but a separate disclaimer contains a clause about selling synthesised voices that is hard to read clearly. Use it only with your own voice.
Pocket TTS
Tiny and quick, runs on an ordinary computer, and fine to sell with if you credit its maker. Some of its included voices are non-commercial, so check which voice you pick.
GLM-TTS
The licence is generous. The voice is trained mainly in Chinese, so test your English chapters carefully before committing a whole book to it.
Bark
Permissively licensed and wonderfully expressive in short bursts, but no longer maintained and wobbly over long passages. Fine for a trailer, tiring for a novel.
Piper
A favourite for running on modest machines. Each voice has its own licence card, and one of the most popular English voices (“lessac”), along with voices built from it, is non-commercial. Check the card for the exact voice you choose.
Leave these alone for books you sell
- Fish Speech S2-Pro and S1-mini: research licence only. A paid commercial licence is available from the maker.
- XTTS-v2: non-commercial, and the company behind it has closed, so there is no licence to buy. It is still the default in some free audiobook tools.
- OmniVoice: non-commercial because of its training data. It is the default engine in at least one popular desktop app.
- VibeVoice: withdrawn by Microsoft after misuse, and it speaks an audible “generated by AI” notice into every file.
- MiraTTS, Facebook’s MMS voices, YourTTS and VCTK FastPitch: all non-commercial.
Check the default before you press go
The free audiobook apps themselves are usually fine to use. The trouble is the voice they load first. Two well-loved tools open on a non-commercial voice by default, so a book made without changing that setting is not one you can sell. Open the settings, choose a model from the clear list above, and you are on solid ground.
A gentle checklist
- Pick a model from the “clear” list.
- Use your own voice, or a voice you have written permission to use.
- Say on your book page that the narration is AI-generated. Many stores now ask for it, and readers appreciate knowing.
- Keep a note of the model and version you used, in case a store asks.
- Re-check the licence when a model releases a new version. Licences can change between versions.
A finished audiobook is a beautiful thing to hand a reader. Choosing the right voice at the start means it stays yours to sell.
Licences checked 1 October 2026 from each model’s official repository and model card. This is a plain-English summary, not legal advice; licences can change, so confirm the current terms before you publish.