OmniVoice:
AI Voice Generator in 646 Languages
OmniVoice lets you generate natural speech, clone voices from short audio samples, and create custom voices from text across 646 languages.
Everything You Need for AI Voice Generation
Natural Text to Speech in 646 Languages
Type your text and OmniVoice generates clear, natural-sounding audio in seconds. It supports 646 languages with a single unified model — no language switching and no extra setup.
Zero-Shot Voice Cloning
Upload a 3–25 second audio sample. OmniVoice captures the speaker's tone, accent, and rhythm — then replicates it across any language. No training required.
AI Voice Design From Text
No recording needed. Describe the voice you want — such as age, pitch, accent, and style — and OmniVoice creates a matching speaker from text alone.
Expressive Speech With Emotions
Add [laughter] or [sigh] inline in your script. OmniVoice renders non-verbal sounds naturally — the way people actually speak.
OmniVoice Text to Speech
One model. Every language.
- ✓Supports 646 languages with one unified model
- ✓Natural prosody across major and low-resource languages
- ✓Pronunciation controls for English and Japanese
- ✓Adjustable speaking speed from 0.5× to 2.0×
Clone Any Voice — Zero Training Required
Reference in, voice out.
- ✓Reference clips as short as 3 seconds
- ✓Automatic transcription with Whisper ASR
- ✓Cross-lingual Voice Cloning in 646 languages
- ✓Robust performance with noisy or imperfect recordings
No Microphone Needed. Just Describe the Voice.
Popular Use Cases for OmniVoice
Audiobook Narration
Long-form narration for books and stories
NPC Dialogue
Dynamic character voices for games
Podcast Intro
Branded intros and promo audio
Language Tutor
Clear pronunciation for language learning
Customer Support
Conversational voices for support workflows
News Anchor
Professional delivery for news and announcements
Why OmniVoice Stands Out
646 Languages With One Unified Model
ElevenLabs supports 32 languages. PlayHT covers 132. OmniVoice covers 646 — including hundreds of low-resource languages the major platforms have never touched.
Lower Word Error Rate
In a 24-language benchmark, OmniVoice achieved 2.85% word error rate — compared to 10.95% for ElevenLabs. More accurate speech means fewer re-generations and better listener experience.
Source: arXiv 2604.00688, Table 3
Higher Speaker Similarity
OmniVoice scores 0.830 on speaker similarity (SIM-o) across multilingual benchmarks, vs. 0.655 for ElevenLabs. Your cloned voices sound like the person — not a rough approximation.
Source: arXiv 2604.00688, Table 3
Production-Ready Speed
OmniVoice runs at RTF 0.022 on batch inference — generating a 60-second audio file in roughly 1.3 seconds. Fast enough for real-time applications, scalable enough for large batch jobs.
Cross-Lingual Voice Cloning
Clone a voice from an English recording and generate speech in Japanese, Arabic, or Swahili — in the same voice. No per-language samples needed.
Single-Stage Architecture
Most TTS systems use a two-stage pipeline (text → semantic → audio), which compounds errors. OmniVoice maps text directly to audio in a single pass — simpler, faster, and more consistent.
OmniVoice vs. the Competition
| Feature | OmniVoice | ElevenLabs | PlayHT |
|---|---|---|---|
| Languages | 646 | 32 | 132 |
| Multilingual WER | 2.85% | 10.95% | — |
| Speaker Similarity | 0.830 | 0.655 | — |
| Price | Free | $5–$1,320/mo | $31–$99/mo |
| Open Source | Yes | No | No |
| Voice Design (text-only) | Yes | No | No |
| Cross-Lingual Cloning | Yes | Limited | No |
| Inference Speed | ~45× RT | — | — |
* WER and SIM-o data: OmniVoice arXiv paper 2604.00688, Table 3, 24-language evaluation.
OmniVoice Pricing Plans for TTS, Voice Cloning, and Voice Design
Start with transparent credit-based pricing for Text to Speech, Voice Cloning, and Voice Design, then choose the plan that fits your usage.
- 99 credits included
- $0.10 per credit
- All 646 supported languages
- Zero-Shot Voice Cloning
- MP3 & WAV download
- Commercial use license
- Standard queue speed
- Email support
- 350 credits included
- $0.085 per credit
- All 646 supported languages Zero-Shot
- Voice cloning with MP3 & WAV download
- Commercial use license
- Priority queue speed
- Priority support
- 600 credits included
- $0.083 per credit
- All 646 supported languages
- Zero-Shot Voice Cloning
- Batch processing
- MP3 & WAV download
- Commercial use license
- Fastest queue + up to 5 concurrent jobs
- Priority support
Choose one-time credits or subscription • Flexible billing options
Frequently Asked Questions
OmniVoice is a free, open-source AI voice generator that supports 646 languages. It converts text to natural-sounding speech, clones voices from a short audio sample (zero-shot Voice Cloning), or creates a voice from a text description alone (Voice Design). Developed by the k2-fsa research team and trained on 581,000 hours of open-source speech data.
Yes. OmniVoice is released under Apache 2.0 — free for personal and commercial use, with no subscription fee, no character limits, and no hidden costs.
OmniVoice supports 646 languages — one of the broadest language coverages available in zero-shot TTS. This includes major languages like English, Japanese, Spanish, and Arabic, as well as hundreds of low-resource languages most TTS tools don't support.
Voice cloning in OmniVoice is zero-shot: provide a 3–25 second audio reference, and OmniVoice immediately extracts the speaker's voice profile to generate new speech — no model training required. It also works cross-lingually: clone a voice from an English recording and synthesize it in any other supported language.
In an independent 24-language benchmark, OmniVoice achieved 2.85% word error rate vs. ElevenLabs' 10.95%, and higher speaker similarity (0.830 vs. 0.655). OmniVoice also supports 646 languages vs. ElevenLabs' 32, and is free and open source vs. $5–$1,320/month.
Voice Design lets you create a voice without any audio reference — just describe it in text: 'female, low pitch, British accent, calm.' OmniVoice generates a matching speaker voice from the description. This feature is unique to OmniVoice and not available in ElevenLabs or PlayHT.
Yes. Apache 2.0 explicitly permits commercial use. OmniVoice was also trained exclusively on open-source datasets, so there are no hidden licensing risks.
OmniVoice supports NVIDIA GPU (CUDA 12.8), Apple Silicon, and CPU. For production use, a GPU is recommended — on an H20 GPU it runs at ~45× real-time speed.
