English speech-to-text transcription and translation
Designed for real-world English conversations
English is spoken by over 1.5 billion people worldwide — across United States, United Kingdom, Canada, Australia, New Zealand, Ireland, South Africa, and beyond. But most speech-to-text solutions struggle with real-world English, which comes with regional accents, fast speech, background noise, or mixed languages.
Understand how English is really spoken.
Accents, slang, fast speech, code-switching, and overlapping dialogue? No problem. Soniox handles the English used in real conversations with ease.
Transcribe and translate instantly - in one call.
Use a single API call to transcribe or translate English as it's being spoken. Get token-level output in mere milliseconds.
Industry-leading accuracy in any condition.
Get top-tier accuracy on English audio with a Word Error Rate of just 6.5% — even in challenging conditions with multiple speakers, overlapping speech, and real-world noise.
Built for production and scale.
Supports real-time (streaming) and asynchronous (batch/file) English transcription, structured JSON output, low latency, and reliable back end.
Use Soniox anywhere English is spoken
Build English-speaking agents and assistants
Power fast and responsive voice agents that understand, transcribe, and respond to English.
Capture clinical conversations in English
Securely transcribe medical conversations and generate structured notes in English.
Generate live English captions and translations
Turn English podcasts, interviews, and videos into ready-to-publish subtitle files and live captions.
Transcribe and translate English on wearable devices
Power hands-free voice features on smartwatches, glasses, and fitness devices.
Built-in tools for English speech-to-text
Everything you need for real-time English transcription and translation - built right into the Soniox API.
- Real-time streaming and async support
- On the fly language detection
- Speaker-aware diarization with punctuation
- JSON formatted and production-ready
- Translate between English and 60 other languages
English transcription with industry-leading accuracy
Never miss a word in English, even when it's fast, messy, accented, or hard to hear. That accuracy means fewer errors, better UX, and apps people can trust.
- Streams fluent, full-sentence output in real time
- Handles regional English accents, noise, and overlapping speech
- Built to perform across real-world conditions
Soniox outperforms other providers for English accuracy (async model):
| Provider | English WER |
|---|---|
| Soniox | 6.5% |
| OpenAI | 10.5% |
| 18.2% | |
| AWS | 11.4% |
| Azure | 9.4% |
| Deepgram | 9.9% |
| AssemblyAI | 9.3% |
| Speechmatics | 9.3% |
| ElevenLabs | 11.1% |
Don't take our word for it. Use your own English audio to compare Soniox against other providers live.
Compare nowBenchmark reportFor developers
Build fast, accurate English voice features - live agents, subtitles, notes - all in one API. It's easy to add English voice capabilities to any app, bot, or tool.
Get API key For everyone
Transcribe, translate, and summarize English conversations on the go. Record live audio and get instant results - perfect for meetings, travel, or everyday conversations.
Get the App Frequently asked questions
How is Soniox different from other English speech APIs?
Most speech APIs are designed for lab conditions and struggle with real-world English speech and conversations, which can include fast talkers, messy audio, regional accents, interruptions, and more. Soniox is speaker-aware and can deliver live, fluent, and organized output with incredible accuracy. Use our live compare tool to test us against other providers.
Is Soniox just for transcription, or can I use Soniox to translate English speech as well?
You can transcribe and translate English in real time with a single API call, even when there are multiple languages being spoken at once. Perfect for multilingual meetings, support conversations, travel, or accessibility tools.
What types of apps can I build with Soniox?
Anything that needs to quickly and accurately understand English speech. Think: voice agents, call centers, media transcription, meeting assistants, wearable tools, medical note systems, and more.
What does the output look like?
You get structured JSON with words, timestamps, speakers, and optional translation. All ready to use in production. Check out our API docs.
How fast is Soniox?
Soniox streams transcription in milliseconds, with token-level updates and sentence-level fluency.
How much does Soniox cost?
For most use cases, it's simple: $0.10/hour for async (file uploads) and $0.12/hour for real-time (streaming). For advanced use cases with translation, custom context, or fine-grained control, pricing is based on token usage. See more on our pricing page.
Go global with one API
Get production-ready speech-to-text recognition, transcription, and translation in 60+ languages.