vioscale
Comparison

Retell AI vs Vapi

No clear leader: Retell AI (78.0) and Vapi (75.9) are within the 5-point margin; treat as a tie. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.

Retell AI full profile →Vapi full profile →
Machine formatsJSONMarkdownGraphQLor send Accept: application/json
Retell AI78
Vapi76
Score
Vioscale score
Retell AI78 / 100medium · 54%updating
Vapi76 / 100high · 75%updating
Pricing
Free tier
Retell AI✓
Vapi✗
Model
Retell AIfreemium
Vapicommercial
Price level
Retell AIlow
Vapilow
Starting price
Retell AI$2
Vapi$10
Transparent
Retell AI✓
Vapi✓
Integrations
Count
Retell AI35
Vapi14
Security
Gdpr
Retell AI✓
Vapi–
Hipaa
Retell AI✓
Vapi✓
Pci
Retell AI–
Vapi✓
Soc2
Retell AI✓
Vapi✓
Reliability
Sla pct
Retell AI–
Vapi99.9
Status page
Retell AI–
Vapi✓
Market
Availability

Capabilities

Feature-by-feature on the axes that matter for voice ai agents. “-” means undocumented, not absent.

Capabilities
Deployment model
Retell AINo code saas platform
VapiDeveloper API endpoint
Sub second latency and interruption barget in handling
Retell AI✗
Vapi✓
Dynamic mid call API function execution
Retell AI✓
Vapi✓
Live human handoff and call transfer logic
Retell AI✓
Vapi✓
Emotion prosody and custom voice cloning
Retell AI✓
Vapi✓
Inbound reception and ivr routing replacement
Retell AI✓
Vapi✓
Outbound dialing and campaign management
Retell AI✓
Vapi-
Post call transcription and CRM sync
Retell AI✓
Vapi-
Voicemail detection and answering machine drops
Retell AI✓
Vapi✓
Twilio vonage bring your own carrier byoc support
Retell AI✓
Vapi✓
SOC2 type ii
Retell AI✓
Vapi✓
HIPAA compliance for medical appointment setting
Retell AI✓
Vapi✓
Pricing model
Retell AIPer minute usage based
VapiPer minute usage based

What each one is

The product in its own terms, so the numbers below have context.

Retell AI

An AI voice platform that handles phone calls autonomously, managing appointment booking, order status checks, lead qualification, and customer service interactions. It integrates with existing CRM systems and telephony infrastructure to maintain customer context and automatically log outcomes.

Independently observed

Vapi

A developer-focused platform for building, deploying, and managing AI-powered voice agents that handle customer interactions including support, callbacks, and notifications. Supports both API-first and UI-based workflows with enterprise-grade reliability and compliance.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Retell AI

from $2/moUsage-basedFree tier

From $0.07–$0.31/minute for AI voice agents. $10 free credit. Enterprise plans available with HIPAA and SOC2 Type II compliance.

  • Pay-as-you-go$0.07–$0.31/minute for AI voice agents; $0.002+/message for chat agents. $10 free credit on signup.
    • Voice agents for inbound/outbound calls
    • Call transfer and routing
    • CRM integration (Salesforce, HubSpot)
    • Post-call transcription and logging
    • Custom LLM models
    • +4 more
  • EnterpriseContact sales
    • HIPAA/BAA compliance
    • Single Sign-On (SSO)
    • Custom MSA agreement
    • Custom Data Processing Agreement (DPA)
    • Dedicated concurrency allocation
    • +1 more
as of verify ↗

Vapi

from $10/line/moHybrid

Usage-based pricing starting at $0.05/minute. Enterprise annual contracts with volume discounts available.

  • Build$0.05/minute for calls, $0.005 per message, $10/additional concurrent line/month
    • Usage-based call minutes
    • SMS/Chat messaging
    • 10 call concurrency included
    • Custom voices and model access
    • Email and Discord community support
    • +3 more
  • ScaleContact sales
    • Fixed platform fee plus committed volume
    • Volume-based per-minute pricing
    • Enterprise-grade uptime SLA
    • SOC2, HIPAA, PCI compliance
    • SSO and OAuth2 integration
    • +6 more
as of verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platforms
Web
Retell AI✓
Vapi✓
iOS
Retell AI✓
Vapi✓
Android
Retell AI✓
Vapi✓
CLI
Retell AI✓
Vapi✗
Deployment
Cloud / SaaS
Retell AI✓
Vapi✓
Self-hosted
Retell AI✗
Vapi✓
Hybrid
Retell AI✗
Vapi✓

Integrations

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

In common (3)
  • Twilio
  • ElevenLabs
  • OpenAI

Retell AI

34 total - 31 not shared
  • Vonage
  • Telnyx
  • Salesforce
  • HubSpot
  • Zoho CRM
  • Zapier
  • n8n
  • Make
  • viaSocket
  • Zendesk
  • Talkdesk
  • RingCentral
  • ServiceTitan
  • Nice
  • Workable
  • Go High Level
  • OpenDental
  • Slack
  • Monday.com
  • Smartsheets
  • Shopify
  • Stripe
  • Xero
  • Supabase
  • +7 more
Independently observed

Vapi

14 total - 11 not shared
  • Google Business Messages / RCS
  • Anthropic
  • Groq
  • Google Cloud
  • Azure
  • Custom LLM providers
  • Custom TTS providers
  • Custom STT providers
  • Webhook integrations
  • REST API
  • MCP (Model Context Protocol)
Independently observed

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