AsyncAI Voice API vs Unreal Speech

Comparing the features of AsyncAI Voice API to Unreal Speech

Feature
AsyncAI Voice API
Unreal Speech

Capability Features

Advanced Speech Features
emotional inflectionrhythm controlmultilingual support
API Access
API Sample Rate Support
44100
API Streaming
Asynchronous Requests
Audio AI Features
end-to-end editingnoise cancellationAI-powered refinement
Comprehensive Documentation
Creative Suite Tools
PodcastingVideo AIAudio AIVoice AI
Dashboard Access
Infinite Voice Styles
Infinite
Lifelike Text-to-Speech
Low Latency
Max Audio Duration
10 hours
Max Monthly Characters
7000000000
Per-sentence Timestamps
Per-word Timestamps
Podcasting Features
audio enhancementnoise reductionvoice conversion
Production Ready Infrastructure
Quick Implementation
<10 minutes
Streaming Endpoint
Streaming Latency
0.3s
Supported Audio Codecs
libmp3lamepcm_mulaw
Supported Bitrates
320k256k192k128k96k64k48k32k16k
Supported Language List
20+
US EnglishUK EnglishMandarin ChineseHindiSpanishPortugueseJapaneseFrenchItalian
Supported Use Cases
Customer ServiceGame DevelopmentDigital MarketingDigital PublishingPatient CommunicationConversion OptimizationConversational AI / AgentsGlobal ReachDigital Humans / AI AvatarsSupply ChainTalent AcquisitionInclusive Design
Supported Voices
48
Synchronous Requests
Text-to-Speech API
/stream/speech/synthesisTasks/streamWithTimestamps
Uptime and Reliability
Uptime SLA
99.9%
Usage Commercial Rights
Video AI Features
intelligent video editingautomatic captioningvisual enhancement
Voice AI Tools
text-to-speechvoice cloning
Voice Cloning
Voice Cloning Sample Duration
3
Voice Library
1000
Voice Model Version
asyncFlow v1.0
Voice Output Emotional Styles
ExcitedNeutralWarm
Voice Parameter Control
SpeedPitch
WebSocket Streaming

Integration Features

API Documentation
API Implementation Languages
PythonJavaScriptcURL
API Integration
PythonNode.jsReact NativeBash
API Output File Formats
WAVraw PCM (pcm_f32le)
Platform Integrations
APIPythonJavaScriptcURL
Sign In Methods
GoogleEmail
Supported Export Formats
MP3PCM µ-law

Limitation Features

API Key Integration
Attribution Requirement
Free plan requires attribution
Max Characters /speech
3000
Max Characters /stream
1000
Max Characters /synthesisTasks
500000
No Pricing Information
No Usage Quotas Stated

Other Features

Affiliate Program
Comparison to Competitors
AmazonMicrosoftGoogleElevenLabsPlay.ht

Pricing Features

Additional Usage Price
Basic - $16 per 1M charactersPlus - $12 per 1M charactersPro - $10 per 1M charactersEnterprise - $8 per 1M characters
Developer-friendly Pricing
Developer-friendly
Elite Plan Quota
625000000
Enterprise Plan Price
$4999/month
Free Characters Limit
250000
Free Plan Rollover
Free Tier
Paid Plan Rollover
Subscription Plans
BasicPlusProEnterprise
Trial Period