vioscale
Comparison

AssemblyAI vs Deepgram

On the evidence we track, AssemblyAI leads this comparison with a composite score of 80/100. 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 formatsJSONMarkdownGraphQLor send Accept: application/json
★AssemblyAI80
Deepgram68
Score
Vioscale score
AssemblyAI80 / 100medium · 60%updating
Deepgram68 / 100low · 43%updating
Pricing
Free tier
AssemblyAI✓
Deepgram✓
Model
AssemblyAIfreemium
Deepgramfreemium
Price level
AssemblyAIlow
Deepgramlow
Starting price
AssemblyAI$0.37
Deepgram–
Transparent
AssemblyAI✓
Deepgram✓
Integrations
Count
AssemblyAI5
Deepgram7
Security
Disclosure policy
AssemblyAI✓
Deepgram–
Gdpr
AssemblyAI✓
Deepgram✓
Hipaa
AssemblyAI✓
Deepgram✓
Pci
AssemblyAI✓
Deepgram✓
Soc2
AssemblyAI✓
Deepgram✓
Reliability
Sla pct
AssemblyAI99.9
Deepgram–
Status page
AssemblyAI✓
Deepgram–
Market
Availability

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 platform providing speech-to-text APIs for both pre-recorded and live audio, voice agent capabilities, and audio analysis features like speaker identification and sentiment analysis. Serves millions of developers with focus on accuracy and scalability.

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 $0.37/hourUsage-basedFree tier

From $0.37/hour for async transcription. Free tier available.

  • Async Speech-to-Text$0.37/hour
  • Real-time Speech-to-Text$0.47/hour
  • Sync Speech-to-Text$0.45/hour
as of verify ↗

Deepgram

Usage-basedFree tier

From $0.0048/min for speech-to-text, $0.015/1k characters for text-to-speech. Free tier with $200 credit.

  • Pay As You GoFree
    • Speech-to-text (45+ languages)
    • Text-to-speech
    • Voice Agent API
    • Speaker diarization
    • Smart formatting
    • +4 more
  • EnterpriseContact sales
    • Custom trained models
    • On-premises or private cloud deployment
    • Dedicated support
    • HIPAA Business Associate Agreement
    • Data Processing Agreement
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✓

Integrations

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

AssemblyAI

Leader
5 total
  • Semantic Kernel .NET
  • Vercel AI SDK
  • OpenAI GPT-5.6 Luna
  • OpenAI GPT-5.6 Terra
  • Google Gemini
Independently observed

Deepgram

7 total
  • Zapier
  • Genesys
  • Cisco
  • Avaya
  • Nuance
  • UniMRCP
  • Y Combinator
Independently observed

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