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One platform for multilingual voice AI

Build real-time voice products with unmatched multilingual accuracy in 60+ languages.

Helping startups and enterprises ship real world voice apps

Speech in, speech out, one platform

Soniox Multilingual Speech-to-Text API

Soniox Speech-to-Text

Transcribe and translate speech in real time across 60+ languages, with native-speaker accuracy in multilingual, language-switching, and multi-speaker conversations.

Soniox Multilingual Text-to-Speech API

Soniox Text-to-Speech

Generate natural, high-fidelity speech in 60+ languages, with precise handling of alphanumerics, names, language switching, and ultra-low-latency applications.

The new standard for multilingual voice AI

Soniox unifies speech-to-text, text-to-speech, and translation in one platform, delivering lower latency, simpler architecture, and unmatched multilingual accuracy through a single API.

One API for the full voice stack

Use speech-to-text, text-to-speech, and translation through a single API and provider. Reduce integration complexity, simplify system design, and ship voice products faster.

Lower latency across every turn

Run transcription, translation, and speech generation on one real-time platform built for live interaction. Deliver faster turn-taking and more natural conversations.

Soniox API is built for low latency voice interactions

Voice agents with native-speaker accuracy

Build voice agents that recognize and generate speech with native-speaker accuracy across 60+ languages.

Soniox API is built for low latency voice interactions

Precise handling of alphanumerics

Capture and speak email addresses, phone numbers, addresses, IDs, and codes with the precision production voice agents require.

Built for the hardest parts of voice AI

Most voice platforms were built for English first. Soniox is built for high accuracy across 60+ languages, seamless language switching, alphanumerics, and low-latency interaction.

Native-speaker accuracy

Recognize speech across languages, accents, names, numbers, and domain-specific vocabulary with unmatched accuracy, even in noisy, multi-speaker conversations.

Soniox supports 60+ languages with native-speaker accuracy

Text-to-speech built for precision

Generate natural, high-fidelity speech in 60+ languages, built for alphanumerics, names, borrowed words, language switching, and other hard production TTS cases.

Soniox Text-to-Speech is built for production use cases that require precise handling of alphanumerics, names, and language switching

Low-latency streaming for live interaction

Transcribe, translate, and generate speech in real time with low-latency streaming built for voice agents, live conversations, and interactive products.

Soniox API is built for low-latency streaming in live voice interactions

Translation for multilingual conversations

Translate spoken content in real time across 60+ languages and 3,600+ language pairs, including conversations where speakers switch languages mid-sentence.

Soniox delivers real-time, context-aware translation across 60+ languages and 3,600+ language pairs, including code-switching environments

Speech infrastructure for massive scale

Soniox Text-to-Speech API performance and reliability

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

View data residency docsarrow_forward
Soniox Text-to-Speech API performance and reliability

Run mission-critical systems with confidence

  • 99.9% uptime
    Production-hardened infrastructure with monitoring and redundancy.
  • Ultra-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.
Onvego uses Soniox Text-to-Speech API for multilingual voice experiences

"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

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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.

Soniox is Soc 2 Type 2 compliant
Soniox is ISO 27001:2022 compliant
Soniox is HIPAA compliant
Soniox is GDPR compliant
SOC 2 Type 2 · ISO/IEC 27001:2022 · HIPAA · GDPR

Use Soniox in popular frameworks

Soniox integrates seamlessly with leading real-time communication platforms, AI frameworks, automation tools, and developer SDKs.

An open source framework and developer platform for building, testing, deploying, scaling, and observing agents in production.

Open source framework for voice and multimodal conversational AI.

Twilio is a cloud-based customer engagement platform (CPaaS) that provides APIs, allowing developers to integrate voice, messaging (SMS, WhatsApp), email, and authentication capabilities into applications.

Open-source development framework designed to build applications powered by large language models (LLMs).

The open-source AI toolkit designed to help developers build AI-powered applications and agents with React, Next.js, Vue, Svelte, Node.js, and more.

Open-source AI SDK with a unified interface across multiple providers. No vendor lock-in, no proprietary formats.

n8n is a powerful, low-code/pro-code workflow automation tool that connects various applications, APIs, and databases to automate tasks.

Compare Soniox side by side

Compare Soniox side by side with other providers across speech-to-text and text-to-speech. Live inputs. Transparent results.

Compare STT livearrow_right_altCompare TTS livearrow_right_alt

Frequently asked questions

What is the Soniox voice platform?arrow_downward
Soniox is a unified multilingual voice API that provides real-time speech-to-text, translation, and streaming text-to-speech in a single platform. One integration gives you access to all voice capabilities across 60+ languages.
Which languages does the Soniox platform support?arrow_downward
Soniox supports 60+ languages for both speech-to-text and text-to-speech, including major global languages and many regional languages, with native-speaker accuracy across accents and dialects.
Can I use speech-to-text and text-to-speech together in one integration?arrow_downward
Yes. The Soniox platform provides both STT and TTS through a single API, so you can transcribe, translate, and generate speech without managing separate services or providers.
How does Soniox handle real-time translation?arrow_downward
Soniox delivers real-time, context-aware translation across 3,600+ language pairs as the speaker is talking, not after they finish. It handles code-switching environments where speakers mix languages mid-sentence.
Is the Soniox platform fast enough for voice agents?arrow_downward
Yes. Soniox is engineered for live, low-latency voice interactions. Speech-to-text operates with sub-200ms latency, and text-to-speech begins streaming audio from the first few words, before the full sentence is available.
Can Soniox handle language switching mid-sentence?arrow_downward
Yes. Both STT and TTS support seamless language switching mid-sentence, accurately recognizing and generating mixed-language speech without manual configuration.
How does Soniox TTS handle alphanumerics and names?arrow_downward
Soniox TTS renders phone numbers, email addresses, IDs, and codes exactly as written, and pronounces person names, place names, and foreign words with the correct pronunciation, even across language boundaries.
Is the Soniox platform suitable for production and enterprise use?arrow_downward
Yes. Soniox is built for mission-critical production systems, offering:
- 99.9% uptime
- Scalable, production-hardened infrastructure
- Priority support with severity-based incident response
- Regional deployment for data residency and compliance
How does Soniox handle privacy and data security?arrow_downward
Speech data is processed and stored entirely within your selected region, supporting data residency and regulatory requirements. Soniox is SOC 2 Type 2 compliant, ISO 27001 certified, and supports HIPAA and GDPR compliance.
Can I deploy Soniox in my region?arrow_downward
Yes. Soniox supports in-region deployment with the same models and APIs worldwide. Currently available in the US, EU, and Japan, with more regions coming soon.
How do I get started?arrow_downward
You can explore the API documentation to start building immediately, or contact Soniox for production and enterprise deployments.
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