Soniox vs Deepgram
for Welsh speech-to-text

Higher accuracy in real-world Welsh, real-time features, and in-stream translation that Deepgram can't match.

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

SonioxvsDeepgram

1,000 hours of audio / month

1025501002505001k2.5k5k10k100k

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 for Welsh

Engineered for real-world accuracy in Welsh.

Soniox delivers production-grade accuracy in Welsh and 60+ languages. It understands fast, informal, accented speech in Welsh, 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."

Tony Wang,
Cofounder & Chief Revenue Officer at Agora

Deepgram’s accuracy drops outside of English, and it struggles with Welsh accents, code-switching, and real-world inputs like spelled-out names or numbers.

Unmatched speed and precision in Welsh.

Soniox streams every Welsh 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."

Dag-Inge Aas,
Head of AI at Tana

Deepgram streams by the sentence, not the word, which causes lag and loss of nuance in live applications.

Understand the rhythm of real Welsh 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."

Adam Strom,
Co-Founder & President at Mobius MD

Deepgram lacks true conversational intelligence, and doesn’t support diarization in multilingual settings.

One API. Everything built in.

Welsh transcription, any-to-any translation, speaker separation, mixed-language support – all from a single model, endpoint, and call. Production-ready from day one.

Deepgram splits features across models, with no multilingual or translation support in a single stream.

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."

Max Malyk,
Vice President at DeliverHealth

Deepgram lacks domain intelligence, and doesn’t support vocab customization or translation control.

In-region performance for Welsh.

Soniox provides true in-region processing and storage for Welsh audio across multiple global deployments. Same model, same Welsh accuracy, same real-time performance.

Deepgram offers EU endpoints, but most processing remains centralized. Additional regions usually require dedicated enterprise deployments, and Welsh model parity can vary.

SONIOX VS DEEPGRAM AT A GLANCE

The benchmarks back it up

In a 2025 study across 60 languages and real-world YouTube audio, Soniox reached 1.25% WER vs 1.71% for Deepgram.

View benchmark report

Feature	Sonioxstt-rt-v5	Deepgramnova-3
Single Multilingual Model
Language Hints
Language Identification
Speaker Diarization
Customization
Timestamps
Confidence Scores
Translation One Way
Translation Two Way
Endpoint Detection		?
Manual Finalization
Sovereign Cloud		?

Trusted by teams building global voice products

Developers choose Soniox for accuracy in Welsh speech

Welsh is spoken by 900 thousand people worldwide — primarily in United Kingdom, with speakers around the world. Soniox delivers production-ready transcription and translation for Welsh, handling regional accents, code-switching, and real-world audio conditions. Deepgram lists Welsh as supported, but benchmark results show far higher error rates compared to Soniox.

Developers often like Deepgram for getting started quickly but often have to sacrifice accuracy, streaming speed, and key features. In real-world Welsh audio, which can include accents, rapid speech, and overlapping speakers, errors increase, streaming lags, and translation isn't included. Soniox offers one API that transcribes and translates Welsh (and 60+ others) with higher accuracy and smoother real-time performance, so your app instantly works worldwide.

Trusted accuracy

Soniox outperforms Deepgram on real-world Welsh speech, so there's less to fix later. Soniox hits 1.25% WER vs 1.71% for Deepgram.

Faster streaming in Welsh

Apps feel smooth and human with token-level updates, refinements, and full transcript control in Welsh.

Welsh translation built in

One API delivers transcription and two-way translation across 60+ languages, including Welsh. 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?

Yes. Soniox costs ~$0.10–0.12/hr, while Deepgram Nova-3 with comparable add-ons costs ~$0.39–0.55/hr. That's 4–5x less expensive.

Does Deepgram support Welsh translation?

No. Deepgram only provides transcription. Soniox includes two-way, in-stream translation across 60+ languages in the same API call.

How does Soniox streaming compare to Deepgram?

Soniox streams token by token in milliseconds, with refinements, manual finalization, and endpoint detection. Deepgram streams by the sentence, creating lag and jumpy transcripts.

Does Deepgram support diarization and timestamps?

Yes, but Soniox provides them faster and in real-time.

Can Soniox handle multiple languages in one stream?

Yes. Soniox detects language shifts mid-conversation. Deepgram requires a single language per request.

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