Build once. Reach billions.

Name: Soniox API
Brand: Soniox Inc

Instantly transcribe and translate speech with the fluency of a native speaker – across every language. Meet the world's first and only universal speech API.

Get API Key Explore the docs

Speech, (mis)understood.

For years, speech-to-text has fallen short, failing at fundamentals like accurate and reliable recognition, multiple languages, and alphanumerics. It converted audio into words, but the words lacked meaning and context.

Until now. Soniox reimagined everything speech-to-text got wrong. You can speak naturally, switch languages mid-sentence, spell out codes and names, or ask for instant translation, all in real-time. Soniox doesn’t just transcribe speech – it understands it.

Get every word right, in every language

Understand speech with native-speaker fluency.

Unlike providers that only perform well in English, Soniox captures every word precisely, with proven lowest error rates, across 60+ languages – including dialects, accents, and mixed phrases.

"We tried a dozen speech-to-text and translation services. Soniox is the best, so that's what we use."

Cayden Pierce,
CEO/CTO at Mentra

Mix languages, not mistakes.

In the real world, people often blend languages within a sentence or phrase. A user might say “오늘 delivery status 알려주세요”, mixing Korean and English. Only Soniox keeps up, instantly recognizing every word in the right language.

"It’s the first model we’ve used that actually understands Hinglish. Switching mid-sentence just works."

Prakash N,
Co-Founder & Director at Tevatel

See it in action here

Every number, every code, every time.

As the leading provider of voicebots for automotive dealerships in Germany, we’ve faced significant challenges recognizing license plates accurately. Soniox has solved this problem with exceptional recognition of alphanumeric sequences, resulting in a much higher acceptance rate for our voicebot.

"As the leading provider of voicebots for automotive dealerships in Germany, we’ve faced significant challenges recognizing license plates accurately. Soniox has solved this problem with exceptional recognition of alphanumeric sequences, resulting in a much higher acceptance rate for our voicebot."

Dr. Steven Zielke,
Founder & CEO of mobilApp

“It just gets the words right — any language, any accent, any context. That’s what accuracy is supposed to look like.”

Tony Wang,
Cofounder & Chief Revenue Officer at Agora

Real time, word by word

Transcribe at the speed of speech.

Soniox captures speech in real-time with unmatched precision, transcribing every word the moment it’s spoken. While other systems lose accuracy or lag, Soniox stays sharp, delivering low-latency recognition that’s precise, natural, and always in sync with live conversation.

"It’s so fast, captions appear before people even finish talking. Zero lag. No buffering. Nothing."

Dag-Inge Aas,
Head of AI at Tana

Speaking Super Fast in Italian – Soniox still translated every word into English

Instantly translate any language to any other.

Soniox delivers the world’s first true real-time, any-to-any speech translation – translating as people speak, not after they finish. Unlike other systems that wait for full sentences or support only one-way pairs, Soniox streams mid-sentence translations continuously between 60+ languages, in every possible combination. The result is low-latency, high-quality translation that sounds natural and immediate.

"Live multilingual meetings finally sound natural, Soniox translates fluidly, in real-time."

VP of engineering at leading AI assistant company

Domain intelligence, built in

More about context here

Speak any industry’s language.

Soniox instantly adapts to your domain – whether it’s healthcare, law, finance, or media – with just a few simple details like domain, topic, or participant names. These hints guide the AI to use the right terminology, phrasing, and context for your field.

"Soniox's ability to accurately transcribe complex medical terminology means our physician-customers spend significantly less time editing. This allows them to finalize their notes faster and focus on what matters most: patient care."

Max Malyk,
Vice President at DeliverHealth

Understand every conversation in context.

Soniox understands context beyond the moment – it can draw from prior conversations, notes, or reference documents to stay aligned with the full story. By carrying forward what’s already been discussed, it delivers more accurate, consistent, and context-aware recognition across every interaction.

"It just gets the context — and when we add our own domain knowledge, it feels completely customized to us."

Mark Boyce,
CEO at MediLogix

More about context here

wand_shine

Get every term right, every time.

Soniox delivers unmatched accuracy for specialized language, ensuring every technical term, brand name, or uncommon phrase is transcribed exactly as spoken. Simply provide your custom terms – from “SOFR” to “force majeure” – and Soniox captures them flawlessly in real-time.

translate

Stay true in every translation.

Define exactly how key terms and phrases are translated – from medical terminology to brand names and idioms. Control whether “MRI” becomes “RM” or “Silicon Valley” stays the same, preserving both precision and meaning across languages.

Keep up with Conversational intelligence

Follow every voice in real-time.

Soniox accurately identifies and separates speakers in real time across 60+ languages, ensuring transcripts always capture who said what. Conversations stay organized, searchable, and clear, even when voices overlap or switch rapidly.

"Soniox knows who’s speaking and when each thought ends. The real-time transcripts read like true dialogue, not data dumps."

Adam Strom,
Co-Founder & President at Mobius MD

Know when to call it quits.

Soniox goes beyond basic timing and silence detection — using advanced endpoint detection that reads tone, meaning, and conversational flow to know when someone is truly finished speaking. The result: smoother, faster, and more natural responses.

"Soniox gives us live transcriptions we can trust — fast, accurate, and natural. It’s why our users trust the experience and keep coming back."

Sidhant Bendre,
Co-Founder at Oleve

Global by default

One API. Every language.

Build in your language and automatically deploy in all of the others. Soniox powers global apps seamlessly, from Tokyo to São Paulo, with the accuracy of a native speaker. Unlike providers that rely on separate models and integrations, Soniox gives you a single API that scales around the world with no extra work.