AssemblyAI vs Retell AI

Comparing the features of AssemblyAI to Retell AI

Feature
AssemblyAI
Retell AI

Capability Features

Agent Builder
Agent Testing
API Access
Appointment Scheduling
Auto-Language Detection
Auto-Sync Knowledge Base
Automatic Scalability
Millions of concurrent calls
Batch Calls
Branded Caller ID
Call History
Call Monitoring
Call Transfer Options
Edge Case Handling
Global Reach
Industry Compliance
SOC 2 Type 1&2HIPAAGDPR
Industry Leading Accuracy
Keyterms Prompting
LLM-Powered
Low Latency
500ms latency
Multi-language Support
18+ languages
Multiple Deployment Channels
AI phone callsWeb callsSMSChat
Natural Language Conversations
Navigate Through IVR
No Concurrency Limits
No-Code Playground
Platform Uptime
99.99% uptime
Preferred by End Users
Preferred by 73% of end users
Reduced Hallucinations
Up to 30% less
Scalable Platform
Smart Formatting
Speaker Diarization
Speech Understanding
Speech-to-Text
Supported Audio Types
Pre-recorded and streaming audio
Verified Phone Numbers
Voicemail Detection

Integration Features

API Integrations
CRM/Automation Integrations
Cal.comn8nGoHighLevelTwilioVonageOpenAI
Integrates with Any CRM
Integrates with Any Telephony
Integrates with Automation Platforms
Integrates with Databases
Platform Integrations
API
Telephony Integration
TwilioVonageTelnyxPlivoRingCentral

Limitation Features

No Desktop App Mentioned
No Explicit Feature Limits
No Mentioned Self-hosting
No Public Pricing Listed
No Throttling

Pricing Features

Free API Trial
Free Tier
No Contracts
Pay as you go pricing
Pricing Plan Details