Hume AI vs Retell AI

Comparing the features of Hume AI to Retell AI

Feature
Hume AI
Retell AI

Capability Features

Agent Builder
Agent Testing
API Access
Appointment Scheduling
Auto-Sync Knowledge Base
Automatic Scalability
Millions of concurrent calls
Batch Calls
Branded Caller ID
Call History
Call Monitoring
Call Transfer Options
Conversational AI
Edge Case Handling
Emotion Instruction
Game and AI Character Use Case
Global Reach
High Quality Voice
Industry Compliance
SOC 2 Type 1&2HIPAAGDPR
Languages Supported
EnglishJapaneseKoreanSpanishFrenchPortugueseItalianGermanRussianHindiArabic
Latency
<200ms
LLM-Powered
LLM-Powered TTS
Low Latency
500ms latency
Media Creation Use Case
Multi-language Support
18+ languages
Multimodal AI
Multiple Deployment Channels
AI phone callsWeb callsSMSChat
Natural Language Conversations
Navigate Through IVR
No Concurrency Limits
Phone Call Use Case
Platform Uptime
99.99% uptime
Speech-to-Speech API
Text to Speech
Verified Phone Numbers
Voice Cloning
Voice Design
Voicemail Detection

Integration Features

API Integration With LLMs
HumeClaude Sonnet 4.5Grok 4 FastGPT 5+20 more
CRM/Automation Integrations
Cal.comn8nGoHighLevelTwilioVonageOpenAI
Developer SDKs
Python SDKTypescript SDKSwift SDKReact SDKC# SDK
Integrates with Any CRM
Integrates with Any Telephony
Integrates with Automation Platforms
Integrates with Databases
Telephony Integration
TwilioVonageTelnyxPlivoRingCentral

Limitation Features

No Desktop App Mentioned
No Mentioned Self-hosting
No Public Pricing Listed
Text Input Limit
500

Pricing Features

Free Tier
Pricing Plan Details