The new frontier in text-to-speech
Create extraordinary voice experiences in 60+ languages with expressive control, exceptional precision, instant voice cloning, and low-latency streaming.
$0.70 per generated hour.
Trusted by teams building global voice products
A new standard for AI speech
Natural, expressive, and multilingual speech with unprecedented control over how every voice sounds and performs.
Direct every performance
Audio tags let you direct emotion, delivery, and vocal reactions, from whispers, laughter, and hesitation to excitement, tension, and reassurance.
Speech that feels human
Soniox generates speech with natural rhythm, pacing, emphasis, and expression, adapting its delivery to the meaning of the text.
Natural and expressive
I thought I knew exactly how the evening would unfold. Then the phone rang. For a moment, I considered letting it go to voicemail—but something told me to answer.
Conversational
Absolutely. I found three flights that arrive before noon. The first is the least expensive, but the second gives you a much shorter connection. Would you like me to compare them?
Storytelling
By the time we reached the top of the hill, the sun was already beginning to set. We stopped for a moment, looked back at the road behind us, and realized the entire valley had turned gold.
Exceptional quality in 60+ languages
Hear the same voice deliver natural, expressive speech across 60+ languages with consistent quality, identity, and pronunciation.
Mix languages naturally
Soniox handles foreign names, technical terminology, and language changes naturally within one continuous utterance.
English and Spanish
Your reservation is confirmed. Cuando llegues al hotel, muestra este código en recepción: ES-4928.
English and French
The meeting has been moved to Tuesday. Merci de confirmer votre disponibilité avant la fin de la journée.
English and Korean
To enable the new feature, open Settings and select 음성 복제, then tap Continue.
English and Japanese
Your order is ready for pickup. 店頭で注文番号 A-7392 をお見せください.
English and German
The deployment completed successfully. Bitte prüfen Sie jetzt die Produktionsumgebung und bestätigen Sie, dass alles funktioniert.
English and Portuguese
Your payment was received. O recibo foi enviado para o seu endereço de e-mail.
English and Hindi
Your appointment is confirmed for Monday at 11 a.m. कृपया दस मिनट पहले पहुँचें.
English and Slovenian
Your table is reserved for seven o’clock. Ko pridete, povejte ime Novak na recepciji.
English with multilingual names and places
Your meeting with Nguyễn Minh Anh is scheduled for 3 p.m. at our office near Place de la République in Paris.
English with international product terms
Open the Soniox Developer Console, select Text-to-Speech, and set the output to 24-kilohertz PCM before deploying on Kubernetes.
Clone any voice from seconds of audio
Create a high-fidelity voice clone that preserves the speaker’s identity, accent, rhythm, personality, and expressive range.
From everyday recording to studio-quality speech
Record anywhere. Soniox removes background noise, echo, and recording artifacts to create a clean, faithful voice clone.
Original noisy recording
Clean cloned voice
More than imitation
Generate entirely new speech that sounds natural, expressive, and unmistakably like the original speaker.
Emma
Conversational voice agent
Exact speech
Complex terminology, names, numbers, and structured information spoken clearly and precisely.
Built for every domain
From medicine and science to law, finance, and engineering, Soniox accurately pronounces specialized terminology across fields of human knowledge.
Alphanumerics spoken correctly
Phone numbers, email addresses, verification codes, prices, dates, addresses, and identifiers are spoken clearly and precisely.
Phone number
You can reach our support team at +1 415 682 9074.
Email address
Send the completed form to alex.chen+support@example.com.
Verification code
Your verification code is 7Q4M9B. I repeat: 7Q4M9B.
Postal address
Your delivery is going to 1427 North St. Andrews Place, Apartment 6B, Los Angeles, California 90028.
Account identifier
Your case number is CX-8047-A19, and the affected device is model XR-12 Pro.
Price
Your total is $1,284.37, including tax and delivery.
Date and time
Your appointment is scheduled for October 21, 2026, at 8:45 a.m.
Names pronounced naturally
Soniox uses language and context to pronounce people, places, brands, and organizations naturally and accurately.
Person name
Your appointment with Siobhan O’Connor is confirmed.
Person name
Nguyễn Minh Anh will be joining the meeting shortly.
Place
Our Asian engineering office is located in Guangzhou.
Place
Your hotel is located near the historic center of Aix-en-Provence.
Technical term
The application is deployed on Kubernetes across several regions.
Product name
The workload runs on NVIDIA H100 GPUs.
Built for real-time conversation
low-latency streaming with precise control over what has already been spoken.
Speech starts before the sentence ends
Start playback while text is still streaming, without waiting for the full message.
Incoming textStreaming
Absolutely, I can help you change your reservation. What date would work better?
Precise timing for every character
Character-level timestamps let applications synchronize text and audio, stop cleanly during interruptions, and continue from the correct point.
Agent
Your reservation includes breakfast, late checkout, and airport—
User
Actually, can I change the dates?
Agent
Of course. What dates would work better?
Character timestamps
k7.30s
b7.53s
e7.54s
t7.55s
t7.77s
e7.79s
r7.81s
?7.85s
Faster, more responsive speech
Reduce pauses between sentences and punctuation while preserving natural, fluent delivery.
Standard pacing
Reduced silence
Estimate your text-to-speech cost
Set your monthly generated speech volume to estimate your Soniox API cost for text-to-speech.
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
Coming soon: Korea, Australia, Canada, India, 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
One model for every voice experience
Natural expression, precise speech, multilingual quality, voice cloning, and real-time performance in one model.
Voice agents
Build responsive agents that speak naturally, handle interruptions cleanly, and communicate names, numbers, and customer information accurately.
Customer support and enterprise IVR
Create reliable voice experiences for support, scheduling, account management, automated phone systems, and customer notifications.
Global products
Deliver consistent voice experiences across 60+ languages, including multilingual and mixed-language speech.
High-stakes speech
Read phone numbers, email addresses, verification codes, addresses, medical instructions, and technical information precisely.
Media, games, and entertainment
Generate expressive narration, character dialogue, localized content, voiceovers, and interactive experiences with built-in or cloned voices.
Accessibility and assistive tools
Build reading and communication tools where speech must remain clear, natural, and faithful to the source text.
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.
SOC 2 Type 2 · ISO/IEC 27001:2022 · HIPAA · GDPR
Frequently asked questions
Which languages does Soniox Text-to-Speech support?
Soniox Text-to-Speech supports 60+ languages with native-speaker fluency. This includes major global languages and many regional languages, with consistent quality across all of them.
Which voices are available?
Soniox offers 28 built-in studio-quality voices, including natural Spanish, British, Australian, and Indian accent variants. Every voice works with all 60+ supported languages, so one voice can carry your product across every market.
How does voice cloning work?
Upload a clean reference clip of
up to 20 seconds of audio through the Soniox Console or API. You get back a voice ID that you use exactly like a built-in voice, and the cloned voice works across all 60+ supported languages.
How does Soniox TTS handle phone numbers, emails, and other alphanumerics?
Soniox TTS renders alphanumerics exactly as written. Phone numbers, email addresses, IDs, PINs, and codes are spoken correctly and consistently, without scrambled digits or dropped characters.
What does "hallucination-free" mean for TTS?
It means what you send is what gets spoken. Soniox TTS does not invent words, drop content, or make unexpected substitutions. The output faithfully matches your input text.
Can Soniox TTS handle mixed-language text in a single utterance?
Soniox TTS pronounces
foreign names, borrowed words, and technical terms
naturally within a sentence. Native language mixing in a single request is rolling out; until then, split text by language and send a request per segment. Every voice speaks all 60+ languages, so the same voice keeps the speaker consistent across segments.
Does Soniox TTS provide timestamps?
Yes. The WebSocket API returns
character-level timestamps with start and end times for every character of spoken text, so you can highlight text in sync with the audio, stop cleanly on interruptions, and continue from the right point.
How much does Soniox Text-to-Speech cost?
Pricing is token-based: $4.00 per 1M input text tokens and $21.50 per 1M output audio tokens, which comes to
about $0.70 per hour of generated speech.
How does Soniox TTS pronounce names and foreign words?
Soniox TTS handles
person names, place names, brand names, and borrowed words
with the pronunciation users expect, even when they originate from a different language than the surrounding text.
Is Soniox TTS fast enough for real-time voice agents?
Yes. Soniox TTS supports streaming speech generation, starting audio output before the full sentence is available. This enables low-latency responses for voice agents and live conversational systems.
Is Soniox TTS suitable for production and enterprise workloads?
Yes. Soniox TTS is built for
high-concurrency production environments, offering:
- 99.9% uptime
- Scalable, production-hardened infrastructure
- Priority support with severity-based incident response
- Regional deployment for data residency compliance
How does Soniox handle privacy and data security?
Speech data is processed and stored
entirely within your selected region, supporting data residency and regulatory requirements. Soniox is designed with privacy, security, and enterprise compliance in mind.
How do I get started?
You can explore the API documentation to start building immediately, or contact Soniox for production and enterprise deployments.
Ready to get started?
Create an account instantly, or contact us to design a custom package for your business.
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See what you’ll pay
Pay only for what you use with our flexible pricing. Built to scale with you.