ISSEN vs Unreal Speech

Comparing the features of ISSEN to Unreal Speech

Feature
ISSEN
Unreal Speech

Capability Features

Asynchronous Requests
Custom Curriculum
Dashboard Access
Dialect and Style Options
Japanese - Tokyo - FormalSpanish - Mexico City - SlangFrench (FR) - Paris - Standard
Flexible Lesson Structure
Grammar Lessons
Max Audio Duration
10 hours
Max Monthly Characters
7000000000
Multiple Tutor Personalities
SakuraSantiagoCéleste
No Judgment
Per-sentence Timestamps
Per-word Timestamps
Personalized Lessons
Production Ready Infrastructure
Realtime Voice Tutor
Shadowing and Translation Drills
Streaming Endpoint
Streaming Latency
0.3s
Supported Audio Codecs
libmp3lamepcm_mulaw
Supported Bitrates
320k256k192k128k96k64k48k32k16k
Supported Language List
AfrikaansArabicArmenianAzerbaijaniBelarusianBosnianBulgarianCantoneseCatalanCroatianCzechDanishDutchEnglishEstonianFinnishFrenchGalicianGermanGreekGujaratiHebrewHindiHungarianIcelandicIndonesianItalianJapaneseKannadaKazakhKoreanLatvianLithuanianMacedonianMalayMandarin ChineseMaoriMarathiNepaliNorwegianPersianPolishPortugueseRomanianRussianSerbianSlovakSlovenianSpanishSwahiliSwedishTagalogTamilThaiTurkishUkrainianUrduVietnameseWelsh
US EnglishUK EnglishMandarin ChineseHindiSpanishPortugueseJapaneseFrenchItalian
Supported Voices
48
Synchronous Requests
Text-to-Speech API
/stream/speech/synthesisTasks/streamWithTimestamps
Tutor Customization
Uptime SLA
99.9%
Usage Commercial Rights
Voice Parameter Control
SpeedPitch
WebSocket Streaming

Integration Features

API Documentation
API Integration
PythonNode.jsReact NativeBash
Mobile App Integration
Play storeApp store
Sign In Methods
GoogleEmail
Supported Export Formats
MP3PCM µ-law
Web-Based Platform

Limitation Features

Attribution Requirement
Free plan requires attribution
Max Characters /speech
3000
Max Characters /stream
1000
Max Characters /synthesisTasks
500000
No Human Teachers
Not Completely Free
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
Cancel Anytime
Elite Plan Quota
625000000
Enterprise Plan Price
$4999/month
Free Characters Limit
250000
Free Plan Rollover
Free Tier
Free Trial Duration
10
Monthly Payment
Paid Plan Rollover
Pricing Range
$20-$29/month
Subscription Plans
BasicPlusProEnterprise
Trial Period