vioscaleAI
Comparison

AssemblyAI vs Deepgram

On the evidence we track, AssemblyAI leads this comparison with a composite score of 78/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

AssemblyAI full profile →Deepgram full profile →
Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.
★AssemblyAI78
Deepgram62
Score
vioscaleAI score
AssemblyAI78 / 100medium · 73%
Deepgram62 / 100medium · 55%
Pricing
Free tier
AssemblyAI✓
Deepgram✓
Model
AssemblyAIfreemium
Deepgramfreemium
Price level
AssemblyAIlow
Deepgramhigh
Starting price
AssemblyAI$0.45
Deepgram$4,000
Transparent
AssemblyAI✓
Deepgram✓
Integrations
Count
AssemblyAI8
Deepgram6
Security
Certifications
Disclosure policy
AssemblyAI✓
Deepgram–
Gdpr
AssemblyAI✓
Deepgram✓
Hipaa
AssemblyAI✓
Deepgram✓
Pci
AssemblyAI✓
Deepgram✓
Soc2
AssemblyAI✓
Deepgram✓
Trust center
Reliability
Sla pct
AssemblyAI99.9
Deepgram–
Status page
AssemblyAI✓
Deepgram–
Market
Availability
Content
Faq
AssemblyAI7 items
Deepgram7 items

Capabilities

Feature-by-feature on the axes that matter for speech to text. “-” means undocumented, not absent.

Capabilities
Real time streaming
AssemblyAI✓
Deepgram✓
Speaker diarization
AssemblyAI✓
Deepgram✓
Custom vocabulary
AssemblyAI✓
Deepgram✓
Fine tuning
AssemblyAI-
Deepgram✓
Word timestamps
AssemblyAI✓
Deepgram-
Punctuation formatting
AssemblyAI✓
Deepgram✓
Pii redaction
AssemblyAI✓
Deepgram✓
Vertical model
AssemblyAI-
Deepgram✓
Offline on device
AssemblyAI-
Deepgram-
Open source
AssemblyAI-
Deepgram-

What each one is

The product in its own terms, so the numbers below have context.

AssemblyAI

Leader

A hosted service offering speech-to-text transcription across 99 languages with real-time and batch processing, speaker identification, sentiment analysis, and infrastructure for building voice agents.

Independently observed

Deepgram

A platform providing real-time speech-to-text, text-to-speech, and voice agent APIs with native support for understanding turn-taking, interruptions, and multi-speaker scenarios. Supports 45+ languages with features like speaker identification, smart formatting, and keyword recognition for enterprise and developer use cases.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

AssemblyAI

Leader
from $0.45/hourHybridFree tier

Free tier with limited hours; pay-as-you-go from $0.45/hr

  • FreeFree
  • Pay-as-you-go$0.45 per hour
  • EnterpriseContact sales
as of verify ↗

Deepgram

from $4000/yrUsage-basedFree tier

From $0.0042/min STT. Free $200 credit on signup. Growth plan $4,000+/year with higher limits.

  • Pay As You GoFrom $0.0042/min STT or $0.045/1k chars TTS. Free $200 credit included.
    • Real-time and batch processing
    • 45+ languages
    • Speaker diarization
    • PII redaction
    • Smart formatting
    • +1 more
  • Growth$4,000+/year
    • All public model endpoints
    • Higher concurrency limits
  • EnterpriseContact sales
as of verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platforms
Web
AssemblyAI✓
Deepgram✓
CLI
AssemblyAI✗
Deepgram✓
Deployment
Cloud / SaaS
AssemblyAI✓
Deepgram✓
Self-hosted
AssemblyAI✓
Deepgram✓
On-premise
AssemblyAI✗
Deepgram✓

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

AssemblyAI

Leader
13 total
  • Semantic Kernel .NET
  • Vercel AI SDK
  • OpenAI GPT-5.6 Luna
  • OpenAI GPT-5.6 Terra
  • Google Gemini
  • Semantic Kernel
  • LangChain
  • Twilio
  • OpenAI
  • Fireworks
  • AWS Bedrock
  • MiniMax
  • Google Cloud Storage
Independently observed

Deepgram

9 total
  • Zapier
  • Genesys
  • Cisco
  • Avaya
  • Nuance
  • UniMRCP
  • Y Combinator
  • TensorFlow.js
  • AudioCodes VoiceAI Connect
Independently observed
Still deciding?

AssemblyAI or Deepgram: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.