Soniox vs Speechmatics speech-to-text
Compare the Soniox and Speechmatics speech-to-text APIs on your own audio — accuracy, real-time streaming, built-in translation, and pricing.
Soniox vs Speechmatics pricing, side by side
Speechmatics 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 Speechmatics, 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 Speechmatics
Get every word right, in every language.
Soniox delivers native-speaker accuracy across 60+ languages, with proven performance on noisy audio, overlapping speakers, dialects, and mid-sentence language switches. No model tuning required; it just works in the real world.
“It just gets the words right, any language, any accent, any context. That’s what accuracy is supposed to look like.”
Speechmatics supports 50+ languages; Soniox covers 60+ with native-speaker accuracy and handles noisy audio, overlapping speakers, and mid-sentence language switches.
Fast. Precise. Always in sync.
Soniox transcribes and translates speech as it’s spoken, with token-level updates and near-zero latency. Transcripts stay in sync. Assistants respond naturally. Nothing gets lost in the stream.
“It’s so fast, captions appear before people even finish talking. Zero lag. No buffering. Nothing.”
Speechmatics supports streaming but lags behind. No token-level control or early finalization, so transcripts jump or fall out of sync, especially with fast speakers or frequent interruptions.
Understand conversations, not just words.
Real conversations aren’t clean or scripted. Soniox handles rapid speaker turns, overlaps, pauses, and mixed-language exchanges, all in real time. With built-in diarization and smart endpoint detection, it keeps up with natural dialogue as it happens.
“Soniox knows who’s speaking and when each thought ends. The real-time transcripts read like true dialogue, not data dumps.”
Speechmatics offers real-time diarization, but Soniox pairs it with token-level streaming and endpoint detection for tighter handling of rapid turns and overlaps.
Built-in domain intelligence.
Soniox adapts to your domain in real time, recognizing technical terms, product names, acronyms, and industry phrasing. You can even steer translations and enforce the vocabulary that matters most.
“Soniox captures complex medical terminology with high accuracy, helping physicians finalize notes faster and focus on patient care.”
Speechmatics offers a static per-job custom dictionary; Soniox steers vocabulary and translations on the fly, in real time.
All features. One API. Global by default.
Soniox includes transcription, any-to-any translation, speaker separation, language detection, and domain control. All in one stream, one call, and no stitching required.
Soniox delivers transcription plus two-way, any-to-any translation across 60+ languages in one stream; Speechmatics translates only to/from English, up to five targets per job.
Trusted by teams building global voice products
Developers choose Soniox for real-time fluency worldwide
Speechmatics provides multilingual transcription with customization features like entity formatting and vocabulary controls. It's a capable transcription service, and for some use cases, that can be a good fit.
But when you need accuracy that holds up in real conversations, streaming that feels live, and translation built in, Soniox is the stronger choice. With one API covering 60+ languages, Soniox is designed for production apps that need to work everywhere.
Leading accuracy
Soniox delivers cleaner transcripts on real conversations, not just controlled audio. Benchmarks show 1.25% WER vs 1.40% for Speechmatics.
Zero delay
Token-level updates keep captions flowing and assistants responsive. Speechmatics streams word-level results; Soniox adds token-level non-final → final refinement for tighter real-time control.
Unified API
Soniox handles both transcription and two-way translation across 60+ languages in the same call. Speechmatics translates only to/from English; Soniox covers any-to-any across 60+ languages.
Soniox surpasses Speechmatics in any language
Get the most accurate, real-time speech-to-text transcription and translation in 60+ languages
Frequently asked questions about Soniox vs Speechmatics
Is Soniox cheaper than Speechmatics?
Does Speechmatics support translation?
How does Soniox streaming compare to Speechmatics?
Does Speechmatics support diarization and timestamps?
Can Soniox handle multiple languages in one stream?
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