Retell AI vs Vapi

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

Retell AI

🟡Low Code

Voice AI

Retell AI is an end-to-end platform for building, deploying and monitoring voice AI agents that handle phone calls at production scale.

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Starting Price

$0.07/min
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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
Full ReviewVisit Site

Feature Comparison

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FeatureRetell AIVapi
CategoryVoice AIVoice AI
Pricing Plans76 tiers185 tiers
Starting Price$0.07/min$0.05/minute + provider costs
Key Features
  • • Latency-tuned conversational engine with natural turn-taking and interruption handling
  • • No-code conversation flow editor plus full SDK access
  • • Phone-number provisioning in 50+ countries with bring-your-own carrier
  • • Build and deploy phone and conversational voice agents
  • • Real-time monitoring and enterprise-grade configurability
  • • Support for customer support, lead qualification, and appointment scheduling

Retell AI - Pros & Cons

Pros

  • ✓Compliance posture (SOC 2 Type II, HIPAA, PCI) is genuinely turnkey for regulated industries.
  • ✓No-code flow editor lets ops teams own the agent without engineering tickets.
  • ✓Latency tuning is audibly better than rolling your own STT-LLM-TTS pipeline.

Cons

  • ✗Per-minute pricing can spike on unbounded outbound campaigns without budget caps.
  • ✗Knowledge base ingestion is simpler than dedicated RAG platforms.
  • ✗Deep customisation still requires the SDK and engineering work.

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

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🔒 Security & Compliance Comparison

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Security FeatureRetell AIVapi
SOC2✅ Yes✅ Yes
GDPR✅ Yes✅ Yes
HIPAA✅ Yes✅ Yes
SSO🏢 Enterprise🏢 Enterprise
Self-Hosted❌ No❌ No
On-Prem❌ No❌ No
RBAC🏢 Enterprise🏢 Enterprise
Audit Log🏢 Enterprise✅ Yes
Open Source❌ No❌ No
API Key Auth✅ Yes✅ Yes
Encryption at Rest✅ Yes✅ Yes
Encryption in Transit✅ Yes✅ Yes
Data Residency——
Data Retentionconfigurableconfigurable
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Read the full reviews to make an informed decision

Review Retell AIReview Vapi