Retell AI vs UntitledPen

Comparing the features of Retell AI to UntitledPen

Feature
Retell AI
UntitledPen

Capability Features

Agent Builder
Agent Testing
AI Writing Commands
rewritepolishimprove flowtone
API Access
Appointment Scheduling
Audio Download Quality Free Plan
128 kbps, 44.1 kHz
Audio Download Quality Paid Plans
Up to 192 kbps, 44.1 kHz
Audio Exports
Auto-Sync Knowledge Base
Automatic Scalability
Millions of concurrent calls
Batch Calls
Branded Caller ID
Call History
Call Monitoring
Call Transfer Options
Customizable Voice Tone
Edge Case Handling
File Upload Support
Global Reach
Industry Compliance
SOC 2 Type 1&2HIPAAGDPR
LLM-Powered
Low Latency
500ms latency
Mini Demo Available
Multi-language Support
18+ languages
Multilingual Support
Multiple Deployment Channels
AI phone callsWeb callsSMSChat
Natural Language Conversations
Natural Voice Generation
Navigate Through IVR
No Concurrency Limits
Notion-like Smart Editor
Platform Uptime
99.99% uptime
Smart Transcription
Smart Writing Assistant
Speech to Text
Studio Mode
Text to Speech
Verified Phone Numbers
Voice Editor
Voice Types
AlloyAshBalladCoralEchoFableNovaOnyxSageShimmerVerse
Voicemail Detection

Integration Features

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

Limitation Features

Audio Quality Limitation Free
128 kbps max
Audio Quality Limitation Paid
192 kbps max
Character Limit
500
Free Plan AI Usage Limit
1000
Free Plan Voice Generation Limit
10000
No Desktop App Mentioned
No Mentioned Self-hosting
No Public Pricing Listed

Pricing Features

Creator Plan Monthly Price
$25 per month
Free Plan AI Refine Limit
1000
Free Plan Character Limit
10000
Free Plan Price
$0
Free Tier
No Credit Card Required
Pricing Plan Details
Pro Plan Price
$12 per month (billed annually)
Pro/Creator Plan Character Limit
200000
Trial Period
Not specified