Inworld AI Platform vs iSpeech TTS & Speech API

Comparing the features of Inworld AI Platform to iSpeech TTS & Speech API

Feature
Inworld AI Platform
iSpeech TTS & Speech API

Capability Features

Advanced Emotion Control (Pro+)
API Key Authentication
API Requests per Month
100000000
Available to Everyone
Cloud and Embedded TTS
Cost Reduction
>95% cost reduction
Create IVR Prompts
Custom Voice Cloning
Demo Characters
Hades (Game NPC)Alex (Tutor)Dennis (Therapist)Ashley (AI Friend)Mark (Call Center)
Developer Signups
80000
Hosted, On-Premise, On-Device
HostedOn-PremiseOn-Device
Multilingual TTS Support
Non-Verbal Control
Open Source
Open Source SDKs
Provider-Agnostic
Realtime Pipelines
Realtime Streaming Output
Scaling Support
SDK Availability
SOTA Multimodal AI
Speech Rate Adjustment
SlowRegularFast
Speech Recognition
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
Talking Stickers
Templates for Realtime Pipelines
Text to Speech
TTS Playground
Visual Graph System
Voice Cloning

Integration Features

Audiobook Support
Chrome Extension
Connected Vehicle Integration
Integrations Information
VapiLiveKit
Mobile Integration
One API Key
SAPI Integration

Limitation Features

Registration Required for Downloads
TTS for Non-Commercial Use Only
Usage Quotas
13/1000

Pricing Features

Free Tier
Has Free Tier
IVR Prompts Free Sample
Pricing Compared to Competitors
>90% cheaper than competing models
Pricing Plans