Soniox vs Deepgram speech-to-text
Compare the Soniox and Deepgram speech-to-text APIs on your own audio — accuracy, real-time streaming, built-in translation, and pricing.
Soniox vs Deepgram pricing, side by side
Deepgram and most speech-to-text APIs charge extra for diarization, translation, and multilingual support, so the headline rate hides the real bill. Soniox is one flat rate with all of it included. Set your monthly hours below to calculate your all-in cost per hour and see how Soniox compares to Deepgram, side by side.
Pricing calculator
Stop overpaying for speech AI
1,000 hours of audio / month
Pricing assumptions
Based on public pay-as-you-go pricing. Enterprise discounts and committed-use contracts may differ. Some providers charge separately for certain features. The calculator uses the public price for the provider configuration that most closely matches Soniox.
Why teams choose Soniox over Deepgram
Engineered for real-world accuracy.
Soniox delivers production-grade accuracy in every language, not just English. It understands fast, informal, accented speech, and handles mixed-language phrases, spoken codes, and alphanumerics with precision that others miss.
“It just gets the words right, any language, any accent, any context. That’s what accuracy is supposed to look like.”
Deepgram’s accuracy is strongest in English and can degrade on heavy accents and real-world inputs like spelled-out names or numbers.
Unmatched speed and precision.
Soniox streams every word in real time – accurate from the first sound, fluent to the last. Captions stay in sync, assistants respond instantly, and nothing gets lost mid-sentence.
“It’s so fast, captions appear before people even finish talking. Zero lag. No buffering. Nothing.”
Soniox streams refined token-level updates in milliseconds; Deepgram's interim results are coarser and revise less smoothly mid-sentence.
Understand the rhythm of real speech
Soniox knows when someone’s speaking, when they’ve stopped, and who’s talking, with built-in speaker separation, sentence boundary detection, and turn-taking awareness.
“Soniox knows who’s speaking and when each thought ends. The real-time transcripts read like true dialogue, not data dumps.”
Deepgram has no built-in translation — multilingual conversations still need a separate translation service bolted on.
One API. Everything built in.
Transcription, any-to-any translation, speaker separation, mixed-language support – all from a single model, endpoint, and call. Production-ready from day one.
Deepgram has no built-in translation in any model — you must bolt on a separate translation service.
Instant domain intelligence.
Soniox catches product names, acronyms, technical terms, and can be guided with your terminology — so output fits your users, product, and industry.
“Soniox captures complex medical terminology with high accuracy, helping physicians finalize notes faster and focus on patient care.”
Deepgram offers keyterm prompting but no built-in translation or translation control.
Trusted by teams building global voice products
Developers choose Soniox for accurate, global-ready speech
Deepgram is popular with developers and makes it easy to get started with transcription. But accuracy falls off in real-world audio, streaming lags, and translation isn't included. With Soniox, one API works for 8 billion people across 60+ languages – delivering transcription and translation with higher accuracy and smoother real-time performance. It's built for production apps that need to work worldwide.
Trusted accuracy
Soniox outperforms Deepgram on real-world speech, with fewer errors to fix. Soniox hits 1.25% WER vs 1.71% for Deepgram.
Faster streaming
Token-level updates appear in milliseconds, so conversations feel live and apps stay fluid. Captions flow naturally and assistants respond instantly.
Translation built in
One API delivers transcription and two-way translation across 60+ languages. Your app works for 8 billion people worldwide with no extra services required.
Soniox surpasses Deepgram in any language
Get the most accurate, real-time speech-to-text transcription and translation in 60+ languages
Frequently asked questions about Soniox vs Deepgram
Is Soniox cheaper than Deepgram?
Does Deepgram support translation?
How does Soniox streaming compare to Deepgram?
Does Deepgram support diarization and timestamps?
Can Soniox handle multiple languages in one stream?
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