What is Soniox?
Soniox is a multilingual voice AI platform that unifies speech-to-text, text-to-speech, and real-time translation through a single API. It supports over 60 languages and 3,600 language pairs, delivering native-speaker accuracy across the most challenging voice AI scenarios — including mid-sentence language switching, alphanumerics, foreign names, multi-speaker conversations, and high-noise environments. With sub-200ms latency for streaming transcription and the ability to start generating speech from the first few words, Soniox is designed for real-time, production-grade voice applications.
Who it's for
- Voice AI developers building voice agents, assistants, or speech-to-speech translation products that need low-latency, multilingual accuracy.
- Enterprise teams deploying voice solutions across call centers, meetings, and government projects where data residency and in-region processing are critical.
- Product builders creating live captioning, dictation, or wearable voice interfaces that demand seamless language switching and high-noise performance.
Key features
Speech-to-text with unmatched accuracy
Soniox delivers world-class recognition across languages, accents, numbers, names, and domain-specific vocabulary. It's engineered for fast, multi-speaker conversations and high-noise environments, so you get reliable transcription even in the toughest audio conditions.
Text-to-speech built for precision
Generate high-fidelity, hallucination-free speech in 60+ languages. The TTS engine handles the hardest production challenges — alphanumerics, foreign names, language switching, and ultra-low-latency streaming — without sacrificing naturalness or clarity.
Low-latency streaming for live interaction
Transcribe speech with sub-200ms latency and start generating audio from the first few words, before the full sentence is available. This makes Soniox ideal for real-time voice agents, live captions, and interactive voice experiences where every millisecond matters.
Real-time translation for multilingual conversation
Context-aware translation across 60+ languages and 3,600 language pairs, engineered for code-switching environments where speakers switch languages mid-sentence. No need to stitch together separate translation and speech providers.
What stands out
"It just gets the words right — any language, any accent, any context. That's what accuracy is supposed to look like."
Soniox was built from the ground up for multilingual accuracy, not as an English-first platform with other languages bolted on. This means it handles alphanumeric strings, foreign names, and rapid language switching with native-speaker precision — areas where most voice AI platforms fall short. Combined with sub-200ms streaming and a single API for speech-to-text, text-to-speech, and translation, it eliminates the complexity of stitching together multiple providers.
Worth checking out if…
You're building a voice product that needs to work reliably across multiple languages, handle real-time interaction, or operate in high-noise or multi-speaker environments. Whether it's a voice agent, live captioning tool, dictation system, or speech-to-speech translation app, Soniox gives you a unified speech layer trusted by Perplexity, Samsung, LG, and many others.
