AsyncAI Voice API vs UntitledPen

Comparing the features of AsyncAI Voice API to UntitledPen

Feature
AsyncAI Voice API
UntitledPen

Capability Features

Advanced Speech Features
emotional inflectionrhythm controlmultilingual support
AI Writing Commands
rewritepolishimprove flowtone
API Access
API Sample Rate Support
44100
API Streaming
Audio AI Features
end-to-end editingnoise cancellationAI-powered refinement
Audio Download Quality Free Plan
128 kbps, 44.1 kHz
Audio Download Quality Paid Plans
Up to 192 kbps, 44.1 kHz
Audio Exports
Comprehensive Documentation
Creative Suite Tools
PodcastingVideo AIAudio AIVoice AI
Customizable Voice Tone
File Upload Support
Infinite Voice Styles
Infinite
Lifelike Text-to-Speech
Low Latency
Mini Demo Available
Multilingual Support
Natural Voice Generation
Notion-like Smart Editor
Podcasting Features
audio enhancementnoise reductionvoice conversion
Quick Implementation
<10 minutes
Smart Transcription
Smart Writing Assistant
Speech to Text
Studio Mode
Supported Language List
20+
Supported Use Cases
Customer ServiceGame DevelopmentDigital MarketingDigital PublishingPatient CommunicationConversion OptimizationConversational AI / AgentsGlobal ReachDigital Humans / AI AvatarsSupply ChainTalent AcquisitionInclusive Design
Text to Speech
Uptime and Reliability
Video AI Features
intelligent video editingautomatic captioningvisual enhancement
Voice AI Tools
text-to-speechvoice cloning
Voice Cloning
Voice Cloning Sample Duration
3
Voice Editor
Voice Library
1000
Voice Model Version
asyncFlow v1.0
Voice Output Emotional Styles
ExcitedNeutralWarm
Voice Types
AlloyAshBalladCoralEchoFableNovaOnyxSageShimmerVerse

Integration Features

API Implementation Languages
PythonJavaScriptcURL
API Output File Formats
WAVraw PCM (pcm_f32le)
Integrations Information
Platform Integrations
APIPythonJavaScriptcURL

Limitation Features

API Key Integration
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 Pricing Information
No Usage Quotas Stated

Pricing Features

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