AssemblyAI vs Deepgram
AssemblyAI is Speech-to-text API with speaker diarization, sentiment analysis, and topic detection, while Deepgram is AI speech-to-text API with real-time transcription and custom model training. The biggest difference up front: Deepgram is free, while AssemblyAI starts at $0.37/hr. AssemblyAI is built for developers wanting transcription and audio intelligence apis, whereas Deepgram targets developers who need fast, accurate, real-time speech-to-text at scale.
| Feature | AssemblyAI | Deepgram |
|---|---|---|
| Free tier available | ✓ | ✓ |
| Open source | — | — |
| Custom models | — | ✓ |
| Low latency | — | ✓ |
| Multi-language | — | ✓ |
| Real-time transcription | — | ✓ |
| Sentiment | ✓ | — |
| Speaker Labels | ✓ | — |
| Speech-to-text API | — | ✓ |
| Summarization | ✓ | — |
| Transcription API | ✓ | — |
Pricing: Deepgram is completely free ($200 free credit to start), which makes it the obvious pick if budget is the top concern. AssemblyAI starts at $0.37/hr, but Free for 100 hrs. That cost buys you a more polished or feature-rich experience, so it comes down to whether the extras justify the spend.
Feature gaps: AssemblyAI offers Sentiment, Speaker Labels and Summarization that Deepgram lacks. Deepgram brings Custom models, Low latency and Multi-language that AssemblyAI does not have.
Where each tool shines: AssemblyAI's biggest strengths are: includes transcription api as a core feature, purpose-built for transcription & ai audio workflows. includes speaker labels as a core feature, purpose-built for transcription & ai audio workflows. Deepgram's biggest strengths are: extremely fast real-time transcription with low latency. custom model training for domain-specific accuracy.
Watch out for: With AssemblyAI, users commonly note that free plan exists but key features are locked behind the paid upgrade. With Deepgram, the main complaint is that api-only — no consumer-facing product.
choose AssemblyAI if
- Your profile matches its sweet spot: developers wanting transcription and audio intelligence apis
- You specifically need Sentiment and Speaker Labels
- You care about includes speaker labels as a core feature, purpose-built for transcription & ai audio workflows
- The free tier works for you: free for 100 hrs
choose Deepgram if
- Your profile matches its sweet spot: developers who need fast, accurate, real-time speech-to-text at scale
- Budget is a hard constraint — Deepgram is free, AssemblyAI is not
- You specifically need Custom models and Low latency
- You care about custom model training for domain-specific accuracy
- The free tier works for you: $200 free credit to start
frequently asked
What is the difference between AssemblyAI and Deepgram?
AssemblyAI is Speech-to-text API with speaker diarization, sentiment analysis, and topic detection, while Deepgram is AI speech-to-text API with real-time transcription and custom model training. The biggest difference up front: Deepgram is free, while AssemblyAI starts at $0.37/hr. AssemblyAI is built for developers wanting transcription and audio intelligence apis, whereas Deepgram targets developers who need fast, accurate, real-time speech-to-text at scale.
Should I use AssemblyAI or Deepgram?
Deepgram is the free option; AssemblyAI charges $0.37/hr but may offer more polish. Here is how they compare.
When should I choose AssemblyAI over Deepgram?
Choose AssemblyAI if Your profile matches its sweet spot: developers wanting transcription and audio intelligence apis; You specifically need Sentiment and Speaker Labels; You care about includes speaker labels as a core feature, purpose-built for transcription & ai audio workflows; The free tier works for you: free for 100 hrs.
When should I choose Deepgram over AssemblyAI?
Choose Deepgram if Your profile matches its sweet spot: developers who need fast, accurate, real-time speech-to-text at scale; Budget is a hard constraint — Deepgram is free, AssemblyAI is not; You specifically need Custom models and Low latency; You care about custom model training for domain-specific accuracy; The free tier works for you: $200 free credit to start.
related comparisons
Otter.ai vs AssemblyAI · Descript vs AssemblyAI · Whisper vs AssemblyAI · AssemblyAI vs Riverside · AssemblyAI vs ElevenLabs · Otter.ai vs Deepgram · Descript vs Deepgram · Whisper vs Deepgram