Deepgram Inc. · Tools

Deepgram

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At a glance

Price
Pricing on request
Vendor
Deepgram Inc.

Specifications & properties

Key decision factors

Pricing model
Freemium 1
Audio functions
  • Speech-to-text
  • Text-to-speech
1
GDPR / EU hosting
EU option available 1
Supported languages
45 languages 1

Pricing

Free tier
Yes 1

Integration

API available
Yes 1
Streaming API
Yes 1

Compliance

SOC 2
Yes 1
Report data / suggest a correction

Metrics vs. the category

Supported languages
45 languages Category max 100 languages (12 with data)
Latency (real-time audio)
n/a

Developer voice AI platform for speech to text (Nova models), text to speech (Aura) and voice agents. Pay-as-you-go pricing per minute (Nova-3 streaming from $0.0048/min) instead of monthly plans, with $200 in free credits to start.

Profile

Deepgram is a developer-focused voice AI API covering speech-to-text transcription, text-to-speech (Aura), and a combined Voice Agent API for building real-time conversational products. It's built for engineering teams shipping production features — transcription for call centers and meetings, voice bots for support and sales, or narration for apps — rather than for solo creators editing one file. Pricing is entirely usage-based: pay-as-you-go rates per minute or per 1,000 characters, a prepaid "Growth" tier at a discount, custom Enterprise deals, and $200 in free credit to start.

Who builds it

Deepgram was founded in 2015 by CEO Scott Stephenson and a co-founder who met doing machine learning research (including waveform analysis for a dark matter detector) before turning to speech technology. The company is remote-first, with staff across 20+ U.S. states and 5+ countries, and describes itself as a research-driven, foundational AI company focused on voice technology. In January 2026 it raised a $130 million Series C, pushing its valuation to $1.3 billion.

Core features

  • Nova-3 — production speech-to-text model supporting 50+ languages, with monolingual and multilingual pricing tiers
  • Flux — real-time conversational speech recognition built for voice agents, with built-in turn detection; currently covers English, Spanish, German, French, Hindi, Russian, Portuguese, Japanese, Italian and Dutch
  • Aura-2 and Aura-1 — text-to-speech models with 40+ English voices spanning US, Australian and Philippine accents, built for sub-200ms streaming in voice-agent use cases
  • Voice Agent API — bundles STT, an LLM, and TTS into one low-latency pipeline, billed on websocket connection time
  • Add-ons: speaker diarization and PII/text redaction, priced per minute on top of base transcription
  • Industry-tuned model variants for healthcare, legal and finance vocabulary, plus public cloud, private cloud and on-premises deployment options

Pricing

  • Speech-to-text (pay-as-you-go, per minute): Flux English $0.0065–$0.0077; Nova-3 Monolingual $0.0048–$0.0077; Nova-3 Multilingual $0.0058–$0.0092; diarization/redaction add-ons +$0.0020/minute
  • Text-to-speech (per 1,000 characters): Aura-2 $0.030 pay-as-you-go / $0.027 on Growth; Aura-1 $0.015 pay-as-you-go / $0.0135 on Growth
  • Voice Agent API: roughly $0.050–$0.163/minute depending on tier and configuration
  • Growth plan: prepaid annual credits at up to ~20% off pay-as-you-go rates (about 13% lower on most STT models)
  • Enterprise: custom volume pricing and terms
  • New accounts get $200 in free credit, no credit card required to start; check the current pricing page as rates can change

Who it's for

Deepgram fits engineering teams building transcription, voice agents, or TTS narration directly into a product, where usage-based per-minute pricing and low-latency streaming matter more than a point-and-click editor. The $200 free credit and pay-as-you-go tier suit prototyping and small apps; the Growth and Enterprise tiers make sense once volume is predictable enough to prepay for the discount, or once a team needs private-cloud/on-prem deployment and custom contract terms.

Frequently asked questions

What does Deepgram cost?

Deepgram is fully usage-based: speech-to-text runs from about $0.0048 to $0.0092 per minute depending on the model (Nova-3, Flux) and whether it's monolingual or multilingual, text-to-speech (Aura) costs $0.015–$0.030 per 1,000 characters, and the Voice Agent API runs roughly $0.050–$0.163 per minute of connection time. A prepaid Growth plan discounts these rates by up to ~20%, and Enterprise customers get custom volume pricing. Check the current pricing page, as rates can change.

Is Deepgram free?

Deepgram gives new accounts $200 in free credit with no credit card required, which can be spent on any of its speech-to-text, text-to-speech, or Voice Agent API usage at pay-as-you-go rates. There's no permanent free tier beyond that starting credit — once it's used up, usage is billed per minute or per 1,000 characters.

What languages does Deepgram support?

Deepgram's core speech-to-text models (Nova-3 and others) support 50+ languages, with dedicated documentation pages for 40+ of them, including Arabic, Bengali, Cantonese, Mandarin, Korean, Thai and Vietnamese. Flux, its newer real-time conversational model for voice agents, currently supports a smaller set — English, Spanish, German, French, Hindi, Russian, Portuguese, Japanese, Italian and Dutch — and Aura's text-to-speech voices are English-only today, spanning US, Australian and Philippine accents.

Does Deepgram have an API?

Yes — Deepgram is an API-first product. It exposes REST and streaming endpoints for speech-to-text (Nova-3, Flux), text-to-speech (Aura-2, Aura-1), and a combined Voice Agent API that chains STT, an LLM, and TTS into one low-latency pipeline, plus a browser playground at playground.deepgram.com for testing before writing code. Deployment options include public cloud, private cloud, and on-premises via its Enterprise Runtime.

Can I use Deepgram commercially?

Deepgram is sold as a commercial API product: its Pay As You Go, Growth and Enterprise plans, and its industry-tuned models for healthcare, finance and contact centers, are explicitly built for production business use. That said, Deepgram's public website Terms of Service mainly cover the marketing site itself and don't spell out detailed content/output ownership terms — those live in Deepgram's Master Service Agreement, so teams with strict compliance needs should review that contract directly rather than relying on the general terms page.

Deepgram vs AssemblyAI — how do they compare?

Both are usage-based speech-to-text APIs aimed at developers, but their pricing and free-credit shapes differ: Deepgram gives $200 in free credit versus AssemblyAI's $50, while AssemblyAI's per-hour rates ($0.15/hour on Universal-2, $0.21/hour on Universal-3.5 Pro for pre-recorded audio) work out cheaper than Deepgram's Nova-3 per-minute pricing (roughly $0.0048–$0.0092/minute, i.e. about $0.29–$0.55/hour) at face value, though exact costs depend on language, add-ons and volume discounts on either side. Deepgram differentiates with its bundled Voice Agent API and Aura text-to-speech in the same platform, while AssemblyAI leans on broad language coverage (100+ languages via its translation add-on) and its own all-inclusive voice agent pricing at $4.50/hour.