Fish Audio is a voice platform with a 2,000,000+ voice library, emotion tags, voice cloning and an API for developers. Narration Box focuses on directed narration with 1500+ narrators and an audiobook creator for EPUB, PDF and DOCX files. Choose Fish Audio for variety and API use, and Narration Box for producing audiobooks and long narration.
Fish Audio lets you generate speech from a library of 2M+ voices and direct delivery with inline emotion and special tags such as whispering, laughing, sighing or a pause. It clones voices from a short sample, supports 30+ languages, and adds Story Studio for audiobooks, speech-to-text, a voice changer, audio translation, an avatar lip-sync feature, a voice agent solution, MCP and a low-latency API.
Narration Box offers 1500+ narrators across 80+ languages and accents, style instructions and inline expression tags in its Enbee V2 voices, and voice cloning from about 30 seconds of audio. Its audiobook creator imports EPUB, PDF or DOCX, splits chapters, lets you assign narrators and regenerate passages, and exports chapter audio. The company also sells done-for-you audiobook production.
| Fish Audio | Narration Box | |
|---|---|---|
| Voice library | 2M+ community and model voices | 1500+ narrators |
| Languages | 30+ | 80+ languages and accents |
| Emotion control | Inline emotion and special tags | Style instructions and inline tags |
| Voice cloning | From a short sample (about 15 seconds) | From about 30 seconds of audio |
| Developer API | Yes, plus voice agent and MCP | Not a focus |
| Free option | 8,000 credits a month, personal use | 1,000 words, watermarked export |
| Paid price | Plus $15 list (first-year $66 annual) | Plus $15, Pro $30, Scale $75 a month |
| Main drawback | Credits reset monthly; free tier personal only | Word allowances; team features coming soon |
Pros: huge voice library; emotion and special tags; cloning; Story Studio, speech-to-text, API, voice agent and MCP; free tier with no card.
Cons: the Free tier is limited to 7 minutes, 500 characters per generation and personal use; credits do not roll over, and a minute costs about 600-625 credits; cloning needs consent and rights.
Pricing: Free; Plus $15/mo listed (first year 50% off at $66 billed annually); Pro $100/mo ($450 annually); Max $999/mo ($4,494 annually).
Best for: creators, game and animation teams, and developers who want expressive voices and an API.
Pros: audiobook workflow from manuscript to chapter files; large narrator set across 80+ languages; voice cloning; commercial rights on paid plans; done-for-you production option.
Cons: free plan covers only 1,000 words with watermarked, low-quality export; long audiobooks need top-ups ($10 per 10,000 words on Scale); team features are marked Coming Soon.
Pricing: Free; Plus $15/mo (20,000 words); Pro $30/mo (45,000); Scale $75/mo (100,000); annual plans are shown as 50% off.
Best for: authors, course builders and podcasters producing narration or full audiobooks.
Pick Fish Audio if you want a huge library of voices, strong emotion control and an API to build voice into a product. Pick Narration Box if your main job is turning a manuscript into audiobook chapters or producing long, multilingual narration. If you only need occasional voiceovers, test the free tier of each on the same script and compare how names and jargon are pronounced.
Skip both if you need a human performance for emotionally sensitive or regulated material. Skip voice cloning unless you own the voice or have written permission to use it. And skip paid plans until you have tested pronunciation on your own script, since credits and word allowances depend on regenerations.
For voice with talking avatars and dubbing, see DupDub. For pay-per-character voiceovers, see VoiceOverMaker. Browse the Best AI Voice & Music Generation Tools and Best AI Tools With a Developer API collections.
Which has more voices? Fish Audio lists 2M+ voices. Narration Box lists 1500+ narrators across 80+ languages and accents.
Which is better for audiobooks? Narration Box has an audiobook creator for EPUB, PDF and DOCX. Fish Audio also has Story Studio with chapter-level control and ACX-ready audio.
Do they have an API? Fish Audio offers a low-latency API for paid subscribers. Narration Box is not positioned around an API.
Can I use the audio commercially? Both allow commercial use on paid plans for voices you own or have rights to. Check each plan's terms.
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Paul
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Paul is an experienced Human Resources professional with a background in applying technology, data analytics, and workflow optimization to HR management. Outside his corporate HR career, he's a seasoned content creator and digital entrepreneur: he built a YouTube channel to 60,000+ subscribers over 10 years, ran a print-on-demand e-commerce business on platforms like GearBubble, and actively uses AI tools and automation in both his own projects and enterprise work — the hands-on experience behind AIFind's tool research and reviews.
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