Most advanced real-time translation

Built for the hardest parts of speech translation

Speech translation breaks when systems wait too long, mistranscribe speech, or only work well for a few major languages.

Real conversations are messy. People speak with accents, switch languages, say names, addresses, emails, phone numbers, IDs, and domain-specific terms. In live conversation, every second of delay makes the experience feel broken.

Soniox speech translation is built for this reality. It combines native-speaker speech recognition, real-time streaming translation, and high-fidelity text-to-speech into one platform for production speech translation across 60+ languages and 3,600 language pairs.

A breakthrough in real-time speech translation

config.json

{
  "model": "stt-rt-v5",
  "translation": {
    "type": "one_way",
    "target_language": "en"
  }
}

Translate before the sentence ends

Soniox streams translation while speech is still happening, so users see or hear meaning immediately.

3,600 language pairs

Translate between any supported languages across 60+ languages, not just English-centric workflows.

High quality across languages

High-quality translation across 60+ languages, including historically underserved languages.

Built on native-speaker STT accuracy

Accurate translation starts with accurate recognition across accents, multilingual speech, and language switching.

Handles names, numbers, and domain terms

Soniox preserves critical details, including names, phone numbers, emails, IDs, and domain-specific terminology.

Translate into text or speech in real time

Use Soniox STT alone to stream translated text alongside the transcript, or combine STT and TTS to speak the translation in the target language. Both run on the same real-time pipeline.

Live Transcription

SpanishTranscript

EnglishTranslation

Speech-to-text translation

Translate live speech into written text using the Soniox STT API. Enable real-time translation with a simple configuration change — Soniox streams transcripts and translated text as speech happens.

Use it for captions, subtitles, meeting translation, agent assist, accessibility tools, and multilingual transcription.

Realtime Translator

HarutoJapanese

Speaking

EmmaEnglish

Speech-to-speech translation

Build full spoken translation by combining Soniox STT and Soniox TTS. Soniox recognizes speech, translates it in real time, and speaks the output in the target language with low latency.

Use it for live interpreters, bilingual voice agents, travel assistants, customer support, and real-time multilingual communication.

One-way or two-way translation

One-way translates every speaker into a single target language. Two-way runs a live bilingual conversation between two languages, so each side speaks naturally and hears the other in their own.

YouTube

One-way translation

Translate speech from any supported language into target language.

Ideal for live captions, multilingual meetings, broadcasts, lectures, events, customer calls, and products where many speakers need to be understood in one language.

More about one-way translation

Live Conversation

Sofía

Two-way translation

Translate between two languages for live bilingual conversation.

Soniox supports real-time two-way translation between any two supported languages, so both sides can speak naturally and understand each other instantly.

More about two-way translation

Translate between all supported languages

Real-time speech translation across 3,600 language pairs including support for mixed-language speech and language switching in conversation.

Estimate your speech translation cost

Start translating live audio streams from ~$0.18/hour. Translation is built into Soniox Speech-to-Text API. Choose real-time or async translation and set your monthly volume below.

Frequently asked questions