Retell AI vs Vapi

Comparing the features of Retell AI to Vapi

Feature
Retell AI
Vapi

Capability Features

A/B Experiments
Agent Builder
Agent Testing
AI Guardrails
API Access
API Configurability
4.2K+ configuration points
API-First Architecture
Appointment Scheduling
Auto-Sync Knowledge Base
Automated Test Execution
Automatic Scalability
Millions of concurrent calls
Millions of calls
Batch Calls
Branded Caller ID
Bring Your Own Models
Call History
Call Monitoring
Call Transfer Options
Community Support
13000
Custom Phone Number
Dedicated Deployment Engineer
Documentation
Edge Case Handling
Enterprise Compliance
SOC2HIPAAPCI
Global Reach
Inbound Calls
Industry Compliance
SOC 2 Type 1&2HIPAAGDPR
LLM-Powered
Low Latency
500ms latency
Multi-language Support
18+ languages
100+ languages
Multiple Deployment Channels
AI phone callsWeb callsSMSChat
Natural Language Conversations
Navigate Through IVR
No Concurrency Limits
No-code/Low-code Workflow
Outbound Calls
Platform Uptime
99.99% uptime
Prebuilt Templates
1000s
Tool Calling
Ultra-low Latency
Sub-500ms
Uptime SLA
99.99% uptime
Verified Phone Numbers
Voicemail Detection

Integration Features

Client SDK
React (web SDK)
CRM/Automation Integrations
Cal.comn8nGoHighLevelTwilioVonageOpenAI
Downloadable SDK ZIP
Github Repository
Integrates with Any CRM
Integrates with Any Telephony
Integrates with Automation Platforms
Integrates with Databases
Integrations Information
40+ apps
OpenAI Integration
openaigpt-4o
Server SDKs
TypeScriptPythoncURL
Telephony Integration
TwilioVonageTelnyxPlivoRingCentral

Limitation Features

No Built-in Telephony Provider Mentioned
No Desktop App Mentioned
No Explicit Pricing Details
No Explicit Usage Quotas Listed
No File Format Support Listed
No Mentioned Self-hosting
No Public Pricing Listed

Pricing Features

Free Tier
Pricing Plan Details