iSpeech TTS & Speech API vs Unreal Speech

Comparing the features of iSpeech TTS & Speech API to Unreal Speech

Feature
iSpeech TTS & Speech API
Unreal Speech

Capability Features

API Requests per Month
100000000
Asynchronous Requests
Cloud and Embedded TTS
Create IVR Prompts
Custom Voice Cloning
Dashboard Access
Developer Signups
80000
Max Audio Duration
10 hours
Max Monthly Characters
7000000000
Open Source SDKs
Per-sentence Timestamps
Per-word Timestamps
Production Ready Infrastructure
SDK Availability
Speech Rate Adjustment
SlowRegularFast
Speech Recognition
Streaming Endpoint
Streaming Latency
0.3s
Supported Audio Codecs
libmp3lamepcm_mulaw
Supported Bitrates
320k256k192k128k96k64k48k32k16k
Supported Language List
US EnglishUK EnglishAustralian EnglishUS SpanishChineseHong Kong ChineseTaiwan ChineseJapaneseKoreanCanadian EnglishHungarianBrazilian PortugueseEuropean PortugueseEuropean SpanishEuropean CzechEuropean DanishEuropean FinnishEuropean FrenchEuropean NorwegianEuropean DutchEuropean PolishEuropean ItalianEuropean TurkishEuropean GreekEuropean GermanRussianSwedishCanadian FrenchArabic
US EnglishUK EnglishMandarin ChineseHindiSpanishPortugueseJapaneseFrenchItalian
Supported Voices
48
Synchronous Requests
Talking Stickers
Text to Speech
Text-to-Speech API
/stream/speech/synthesisTasks/streamWithTimestamps
Uptime SLA
99.9%
Usage Commercial Rights
Voice Parameter Control
SpeedPitch
WebSocket Streaming

Integration Features

API Documentation
API Integration
PythonNode.jsReact NativeBash
Audiobook Support
Chrome Extension
Connected Vehicle Integration
Mobile Integration
SAPI Integration
Sign In Methods
GoogleEmail
Supported Export Formats
MP3PCM µ-law

Limitation Features

Attribution Requirement
Free plan requires attribution
Max Characters /speech
3000
Max Characters /stream
1000
Max Characters /synthesisTasks
500000
Registration Required for Downloads
TTS for Non-Commercial Use Only
Voice Cloning

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
Elite Plan Quota
625000000
Enterprise Plan Price
$4999/month
Free Characters Limit
250000
Free Plan Rollover
Free Tier
IVR Prompts Free Sample
Paid Plan Rollover
Subscription Plans
BasicPlusProEnterprise
Trial Period