Vapi vs Deepgram

Detailed side-by-side comparison to help you choose the right tool

Vapi

🔴Developer

Voice AI

Voice AI platform for building phone-calling agents that sound human and integrate with any business system.

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Starting Price

$0.05/minute + provider costs
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Deepgram

🔴Developer

Speech AI

Voice AI platform with a fast, low-cost speech-to-text engine (Nova), a natural-sounding text-to-speech engine (Aura), and a Voice Agent API for building end-to-end voice assistants.

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Starting Price

Free
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Feature Comparison

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FeatureVapiDeepgram
CategoryVoice AISpeech AI
Pricing Plans3 listed plans5 listed plans
Starting Price$0.05/minute + provider costsFree
Key Features
  • • Build and deploy phone and conversational voice agents
  • • Real-time monitoring and enterprise-grade configurability
  • • Support for customer support, lead qualification, and appointment scheduling
  • • Speech-to-text APIs for streaming and prerecorded audio
  • • Flux conversational STT for real-time voice agents with turn detection and interruption handling
  • • Text-to-speech through Aura voices

Vapi - Pros & Cons

Pros

  • ✓Combines telephony, streaming speech, models, tools, and transfers in one developer platform
  • ✓Supports multiple LLM, speech, voice, and carrier providers
  • ✓Function calling enables real business-system actions during calls
  • ✓Usage-based entry point supports small pilots

Cons

  • ✗Base platform fee excludes model, speech, and telephony charges
  • ✗Live calls introduce consent, recording, outbound-contact, and privacy obligations
  • ✗Quality depends on several providers plus prompt and tool design

Deepgram - Pros & Cons

Pros

  • ✓Nova speech-to-text with 30+ languages and word-level timestamps. This directly supports the primary workflow.
  • ✓Real-time streaming transcription with very low latency.
  • ✓Aura text-to-speech with sub-300ms first audio.
  • ✓Voice Agent API bundling STT + LLM + TTS over one WebSocket.

Cons

  • ✗At least one tier requires a sales quote, preventing a complete public budget calculation.
  • ✗Features and limits can change by plan, billing interval, region, and release; verify current documentation.
  • ✗No native MCP support is documented in this record, so agent workflows may require API work or another integration layer.
  • ✗A representative pilot is necessary because a feature list does not establish reliability or operational fit.

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🔒 Security & Compliance Comparison

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Security FeatureVapiDeepgram
SOC2✅ Yes✅ Yes
GDPR✅ Yes✅ Yes
HIPAA✅ Yes❌ No
SSO🏢 Enterprise✅ Yes
Self-Hosted❌ No—
On-Prem❌ No✅ Yes
RBAC🏢 Enterprise✅ Yes
Audit Log✅ Yes✅ Yes
Open Source❌ No❌ No
API Key Auth✅ Yes✅ Yes
Encryption at Rest✅ Yes✅ Yes
Encryption in Transit✅ Yes✅ Yes
Data Residency—US
Data Retentionconfigurableconfigurable
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Review VapiReview Deepgram