Deepgram vs Vapi

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

Deepgram

🔴Developer

Voice AI

Speech-to-text, text-to-speech and voice agent APIs with industry-leading latency, accuracy and per-language model quality.

Was this helpful?

Starting Price

Free
Full ReviewVisit Site

Vapi

🔴Developer

Voice AI

Vapi is the developer platform for voice AI agents — build, deploy, and scale phone agents with usage-based pricing and bring-your-own model keys.

Was this helpful?

Starting Price

$0.05/minute + provider costs
Full ReviewVisit Site

Feature Comparison

Scroll horizontally to compare details.

FeatureDeepgramVapi
CategoryVoice AIVoice AI
Pricing Plans104 tiers185 tiers
Starting PriceFree$0.05/minute + provider costs
Key Features
  • • 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
  • • Build and deploy phone and conversational voice agents
  • • Real-time monitoring and enterprise-grade configurability
  • • Support for customer support, lead qualification, and appointment scheduling

Deepgram - Pros & Cons

Pros

  • ✓Best-in-class word error rate via Nova-3 model across 30+ languages
  • ✓Aggressively priced per-minute: from $0.0043/min beats most rivals
  • ✓Voice Agent API unifies STT + LLM + TTS with server-side turn-taking
  • ✓Free $200 credit lets teams prototype end-to-end without commitment
  • ✓On-prem deployment supports HIPAA and air-gapped environments

Cons

  • ✗Aura TTS voice library smaller than ElevenLabs or Cartesia
  • ✗Documentation can feel dense for first-time integrators
  • ✗Some advanced features (diarisation tuning) require sales conversations
  • ✗Voice agent API still maturing relative to Vapi or Retell AI for high-level orchestration

Vapi - Pros & Cons

Pros

  • ✓Transparent usage pricing — $0.05/min plus BYO model keys is easy to forecast
  • ✓Sub-700ms turn-taking feels conversational, not robotic
  • ✓Provider-agnostic stack lets you pick best-of-breed STT, LLM, and TTS
  • ✓Developer surface is solid: SDKs, webhooks, custom function calls
  • ✓HIPAA and PCI options unlock healthcare and fintech use cases

Cons

  • ✗Not a no-code product; non-developers will need engineering support
  • ✗HIPAA at $2k/mo and ZDR at $1k/mo add up quickly for small teams
  • ✗10 concurrent lines is fine for most pilots but extra lines at $10/mo scale fast
  • ✗Model costs pass through, so a chatty agent on GPT-4 can be expensive
  • ✗Documentation around advanced routing and warm transfers is still maturing

Not sure which to pick?

🎯 Take our quiz →

🔒 Security & Compliance Comparison

Scroll horizontally to compare details.

Security FeatureDeepgramVapi
SOC2✅ Yes✅ Yes
GDPR✅ Yes✅ Yes
HIPAA❌ No✅ Yes
SSO✅ Yes🏢 Enterprise
Self-Hosted—❌ No
On-Prem✅ Yes❌ No
RBAC✅ Yes🏢 Enterprise
Audit Log✅ Yes✅ Yes
Open Source❌ No❌ No
API Key Auth✅ Yes✅ Yes
Encryption at Rest✅ Yes✅ Yes
Encryption in Transit✅ Yes✅ Yes
Data ResidencyUS—
Data Retentionconfigurableconfigurable
🦞

New to AI tools?

Read practical guides for choosing and using AI tools

Read Guides →
🔔

Price Drop Alerts

Get notified when AI tools lower their prices

Tracking 2 tools

We only email when prices actually change. No spam, ever.

Get weekly AI agent tool insights

Comparisons, new tool launches, and expert recommendations delivered to your inbox.

No spam. Unsubscribe anytime.

Ready to Choose?

Read the full reviews to make an informed decision

Review DeepgramReview Vapi