Soniox vs Deepgram
for Bulgarian speech-to-text
Higher accuracy in real-world Bulgarian, 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
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 for Bulgarian
Engineered for real-world accuracy in Bulgarian.
Soniox delivers production-grade accuracy in Bulgarian and 60+ languages. It understands fast, informal, accented speech in Bulgarian, 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
Unmatched speed and precision in Bulgarian.
Soniox streams every Bulgarian 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
Understand the rhythm of real Bulgarian 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
One API. Everything built in.
Bulgarian transcription, any-to-any translation, speaker separation, mixed-language support – all from a single model, endpoint, and call. Production-ready from day one.
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
In-region performance for Bulgarian.
Soniox provides true in-region processing and storage for Bulgarian audio across multiple global deployments. Same model, same Bulgarian accuracy, same real-time performance.
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 reportTrusted by teams building global voice products
Developers choose Soniox for accuracy in Bulgarian speech
Bulgarian is spoken by 8 million people worldwide — primarily in Bulgaria, with speakers around the world. Soniox delivers production-ready transcription and translation for Bulgarian, handling regional accents, code-switching, and real-world audio conditions. Deepgram lists Bulgarian 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 Bulgarian 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 Bulgarian (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 Bulgarian speech, so there's less to fix later. Soniox hits 1.25% WER vs 1.71% for Deepgram.
Faster streaming in Bulgarian
Apps feel smooth and human with token-level updates, refinements, and full transcript control in Bulgarian.
Bulgarian translation built in
One API delivers transcription and two-way translation across 60+ languages, including Bulgarian. 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 Bulgarian 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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