Vietnamese text-to-speech API
TTS API for real-time Vietnamese speech generation in voice agents, IVR, and narration. With voice cloning, character-level timestamps, and language mixing between Vietnamese and 60+ supported languages.
$0.70/hour of generated audio
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Vietnamese speech synthesis for production voice apps
Vietnamese is spoken by more than 95 million people in Vietnam and around the world. If your voice agent, IVR, or narration product speaks to them, text-to-speech has to get the details right: phone numbers and codes read exactly as written, names pronounced the way Vietnamese speakers expect, and text that mixes Vietnamese with English spoken in one voice.
Soniox TTS generates Vietnamese speech over a real-time WebSocket, starting audio from the first few words, or with a single REST request, through one multilingual API built for 60+ languages. Every voice speaks Vietnamese, you can clone your own voice, mix languages in one sentence, and get character-level timestamps.
Exceptional quality in Vietnamese
Hear the same voice deliver natural, expressive speech in Vietnamese and across 60+ languages with consistent quality, identity, and pronunciation.
Hallucination-free Vietnamese speech generation
The Vietnamese text you send is exactly what gets spoken. No invented words, dropped content, or unexpected substitutions.
Lịch hẹn của bạn đã được xác nhận vào 9:45 sáng ngày 3 tháng 6.
Lịch hẹn của bạn đã được xác nhận vào 9:45 sáng ngày 3 tháng 6.
Alphanumerics spoken correctly in Vietnamese
Email addresses, phone numbers, addresses, IDs, and codes spoken clearly and precisely in Vietnamese.
cộngmộtbốnmộtnămnămnămnămkhôngmộtbahai
Names pronounced naturally in Vietnamese
Handle person names, place names, brand names, and borrowed words with the pronunciation Vietnamese speakers expect.
bee · YON · say
Streaming Vietnamese speech before the sentence ends
Start generating Vietnamese speech from the first few words, before the full sentence is available, for low-latency voice agents and live systems.
Chắc chắn rồi, tôi có thể giúp bạn đổi lịch đặt chỗ. Ngày nào sẽ thuận tiện hơn cho bạn?
Precise timing for every character
Character-level timestamps let applications synchronize Vietnamese text and audio, stop cleanly during interruptions, and continue from the correct point.
Seamless language switching with Vietnamese mid-sentence
Speak mixed-language text naturally in a single utterance, switching between Vietnamese and other languages with the right flow and pronunciation.
VietnameseEstimate your Vietnamese text-to-speech API cost
Set your monthly generated speech volume to estimate your Soniox API cost for text-to-speech.
Pricing calculator
Vietnamese text-to-speech API pricing
1,000 hours of speech / month
Pricing assumptions
Based on public pay-as-you-go pricing. Enterprise discounts and committed-use contracts may differ. Some providers charge separately for certain features. The calculator uses the public price for the provider configuration that most closely matches Soniox.
Speech infrastructure for massive scale
Build on one API and deploy in your region
Use the same models and API everywhere, with in-region processing to meet latency, data residency, and regulatory requirements.
Available: US, EU, Japan, India
Coming soon: Korea, Australia, Canada, Saudi Arabia, UK, Brazil
Run mission-critical systems with confidence
- 99.9% uptime
Production-hardened infrastructure with monitoring and redundancy. - low-latency streaming
Process speech in real time with low latency for responsive voice applications. - Priority support
Severity-based incident response with direct access to the Soniox team.
"Before Soniox, our international users always had a noticeably different experience. Now accuracy and responsiveness match across all regions…it feels like one system instead of five."
Alon Yair CTO of Onvego
Vietnamese text-to-speech use cases
Soniox TTS is built for Vietnamese voice applications where latency, accuracy, and reliability matter as much as voice quality.
Voice agents
Streaming Vietnamese replies that start before the LLM finishes and stop cleanly when the user interrupts.
Enterprise IVR and customer support
Read Vietnamese account data, verification codes, and addresses exactly as written, at scale.
Multilingual communication
Speak Vietnamese mixed with other languages in one voice, with foreign names pronounced correctly.
Accessibility and assistive voice tools
Dependable Vietnamese voice output for reading assistants and communication tools.
Media and content production
Vietnamese narration and audio content at scale, with names and technical terms pronounced correctly.
Video voiceover
Vietnamese voiceovers for product, training, and marketing videos, in a built-in or cloned voice.
Start generating Vietnamese speech from $0.70 per hour of generated audio.
Go global with one API
Get production-ready text-to-speech in 60+ languages.
Also for Vietnamese: Vietnamese speech-to-text API for voice input, and the Vietnamese voice AI platform for enterprise deployment.
Privacy and compliance, built right in
Never stored, never saved.
Audio stays in memory, everything is processed in real-time.
Built for privacy-critical use cases.
Adhering to leading global security, privacy, and compliance standards.
Trusted where privacy matters most.
Used in industries where speech is sensitive, from healthcare to enterprise.
Frequently asked questions
Does Soniox support text-to-speech for Vietnamese?
How natural does Soniox sound in Vietnamese?
How much does the Vietnamese text-to-speech API cost?
Which TTS model does Soniox use for Vietnamese?
tts-rt-v2, one model for all 60+ supported languages. See TTS models.Which SDKs can I use?
Can I clone a voice for Vietnamese?
How does Soniox TTS handle alphanumerics in Vietnamese?
Can Soniox TTS handle mixed-language text with Vietnamese?
How does Soniox TTS pronounce names and foreign words in Vietnamese?
Is Soniox TTS fast enough for real-time Vietnamese voice agents?
Where is Vietnamese speech data processed, and is it used for training?
Is Soniox TTS ready for production Vietnamese workloads?
How do I get started?
Get started with the Soniox API
Create an account instantly, or contact us to design a custom package for your business.
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Pricing details