What does Speechmatics do?

Speechmatics provides speech technology and Voice AI for enterprises, offering accurate Speech-to-Text, Text-to-Speech, and Voice Agent solutions. Our models understand every voice and accent across 55+ languages, helping businesses unlock the full potential of voice data.

How accurate is Speechmatics Speech-to-Text?

Speechmatics delivers best-in-market accuracy, achieving up to 99% word accuracy and 96% medical keyword recall in industry benchmarks. Our models handle multiple accents, noisy environments, and multi speakers with ease.

What makes Speechmatics Text-to-Speech different?

Our low-latency Text-to-Speech (TTS) delivers lifelike, human-sounding voices with sub-150ms latency that is ideal for real-time conversations. Developers can stream natural speech in multiple voices and deploy it in the cloud, hybrid, or on-prem for privacy and control.

Can I build real-time voice agents with Speechmatics?

Our voice AI enables developers to build real-time voice agents that listen, understand, and respond naturally. Plug in fast with a flexible API and native integrations to power your AI voice agents.

Which industries use Speechmatics?

Speechmatics is trusted by organizations in media, healthcare, contact center, medical, finance, legal, education, and accessibility. Our technology powers transcription, translation, call analytics, and voice AI applications worldwide.

Speechmatics vs Deepgram: Which Speech-to-Text API Delivers?

See why developers are switching to Speechmatics for superior speech-to-text accuracy, industry-leading language support, and advanced speaker diarization.

[alt: Dark interface comparing speech-to-text tools with logos: VAPI, Pipecat, LiveKit. Features text demonstrations.]

Speechmatics named G2 Leader in 2026

See how Speechmatics compares vs Deepgram on your audio

Choose from live radio, your own voice, or sample audio to see side-by-side comparisons of Speechmatics vs Deepgram.

Why teams evaluate Speechmatics after trying Deepgram

Accuracy

Limited language and accent coverage

Built for the real world, Speechmatics delivers unmatched accuracy in noisy environments, across diverse dialects & accents. The most inclusive STT engine.

Languages

Broader language coverage

Deepgram offer fewer deployment options - global companies cannot use them. Speechmatics cover more, with accuracy in noisy environments.

Reliability

Data privacy trade-offs in standard pricing

No data logging by default. No surprise price hikes. With superior customer success, transparent terms, and production-grade reliability that scales.

Speechmatics vs Deepgram: A detailed comparison

A comprehensive comparison of features, accuracy, and capabilities.

Feature	Speechmatics ⭐	Deepgram
Supported Languages	55+ languages	36+ (expanding)
Flagship Model	Ursa 2 (1M+ hours training data)	Nova-3
WER (English-only)	1.07% WER	1.62% WER
Real-Time Transcription
Batch Transcription
Cloud Deployment
On-Premises Deployment		Limited
On-Device Deployment
Air Gapped
ISO 27001 Certified
SOC2 Type II		(Type I and II)
HIPAA Compliant
GDPR Compliant		(EU endpoint available)
Accent Coverage	Industry-leading across 55+ languages	Strong for English only; expanding globally
Pricing	From $0.24hr (standard)	From $0.46hr (Nova-3)
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Advanced Features

Feature	Speechmatics ⭐	Deepgram
Speaker Diarization	No extra charge	Extra charge
Multi-speaker Accuracy	Market-leading	Standard
Custom Dictionary	No extra charge	Extra charge
Custom Dictionary Word Count	1000 words	100 words only
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Public Reviews

Feature	Speechmatics ⭐	Deepgram
G2 Rating	4.8 out of 5	4.6 out of 5
Capterra	4.5 out of 5	Not applicable
Tech Radar	4.8 out of 5	Not applicable
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Where Speechmatics outperforms Deepgram

Real-Time ASR | Enterprise Differentiation | Competitive Positioning

Superior real-time accuracy

Consistently outperforms Deepgram in low-latency transcription, especially for non-English languages and challenging accents.

Broader language support

55+ languages vs. Deepgram’s 34; single model for all languages accents and dialects - covering over half the world's population.

Enterprise-grade security

ISO 27001, GDPR, HIPAA-compliant, SaaS, on-prem, private cloud options (vs. Deepgram’s cloud-first approach).

Custom Dictionary

Instant terminology tuning without retraining, unlike Deepgram’s domain-specific models which is complex and requires huge amounts of data.

Flexible pricing

Negotiable enterprise pricing and volume discounts; Deepgram appears cheaper but has hidden costs for premium features.

More than just speech-to-text

Use Speechmatic’s Voice AI stack to build powerful, fast, open-source AI Voice Agents with incredible low latency and seamless interactions.

Start building with Speechmatics today

1) 👤 Log in or signup to the Speechmatics Portal

2) 💳 Add a valid payment card (no charge until credit is used)

3) 🔑 Enter your code: SWITCH200

4) 🚀 Start building with $200 free credit

Frequently Asked Questions: Speechmatics vs Deepgram

Is Speechmatics more accurate than Deepgram?

Yes. Speechmatics achieves a 1.07% Word Error Rate (WER) for English, compared to Deepgram's 1.62%. It also outperforms Deepgram in real-time transcription, particularly for non-English languages and challenging accents.

Here are recent benchmarks from Daily (Pipecat), where Speechmatics were recognized as a top-tier provider for real-time voice agents, sitting firmly on the "Pareto frontier".

How many languages does Speechmatics support vs Deepgram?

Speechmatics supports 55+ languages with a single model covering all languages, accents, and dialects. Deepgram supports 36+ languages, with strong coverage primarily for English.

Can Speechmatics be deployed on-premises?

Yes — Speechmatics supports cloud, on-premises, on-device, and air-gapped deployments. Deepgram is primarily cloud-first with limited on-premises options.

Which is cheaper — Speechmatics or Deepgram?

Speechmatics starts from $0.24/hr versus Deepgram's $0.46/hr for Nova-3. Deepgram may appear cheaper upfront but charges extra for premium features like speaker diarisation and custom vocabulary, which Speechmatics includes at no extra cost.

How does custom vocabulary work in Speechmatics vs Deepgram?

Speechmatics allows instant terminology tuning via a custom dictionary of up to 1,000 words at no extra charge. Deepgram limits custom dictionaries to 100 words and charges additionally, with domain-specific models that are complex to set up and require large amounts of training data.

Is Speechmatics HIPAA compliant?

Yes, Speechmatics is HIPAA compliant, and also boasts ISO 27001 certification, SOC2 Type I and II, and GDPR compliance (with an EU endpoint available).

Can I switch from Deepgram to Speechmatics easily?

You are entitled to $200 in free credits with the code SWITCH200 for anyone looking to try Speechmatics, as well as benefitting from superior customer success support.

Ready to switch to superior speech-to-text?

Join thousands of developers building the future of voice with Speechmatics. Get $200 in free credits when you sign up today.

Resources for AI Voice Agents

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Voice Agents

Vapi and Speechmatics: Build agents that understand every voice

Ship Voice AI agents that stay readable in real time, even in noisy, multi-speaker calls.

SpeechmaticsEditorial Team

[alt: Livekit and Speechmatics partnership]

Voice Agents

Introducing real-time, speaker-aware Voice Agents with LiveKit + Speechmatics

Speechmatics brings speaker diarization to LiveKit agents - enabling them to understand not just what was said, but who said it.

Anthony PereraProduct Marketing Manager

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Pipecat and Speechmatics: Building Voice Agents that know exactly ‘Who’ said ‘What’

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SpeechmaticsEditorial Team

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