Coval vs iSpeech TTS & Speech API

Comparing the features of Coval to iSpeech TTS & Speech API

Feature
Coval
iSpeech TTS & Speech API

Capability Features

API Requests per Month
100000000
Audio Inputs
Audio Replay
Built-in Metrics
latencyaccuracytool-call effectivenessinstruction compliance
Cloud and Embedded TTS
Create IVR Prompts
Custom Environments
Custom Metrics
Custom Voice Cloning
Developer Signups
80000
Fully Customizable Voice
Human-in-the-Loop
Open Source SDKs
Performance Alerts
Production Call Monitoring
Prompt Change Re-simulation
Regression Tracking
Scenario-Based Testing
SDK Availability
Simulate Conversations
Speech Rate Adjustment
SlowRegularFast
Speech Recognition
Streaming Alerts
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
Text Chat Compatible
Text to Speech
Transcripts as Input
Voice AI Features
Workflow Tracing
Workflow-Based Simulation

Integration Features

Audiobook Support
Chrome Extension
Connected Vehicle Integration
Developer-Focused Integrations
Mobile Integration
SAPI Integration

Limitation Features

No Mentioned Integrations
No Pricing Information
Registration Required for Downloads
TTS for Non-Commercial Use Only

Pricing Features

Free Tier
Free Trial/Demo
IVR Prompts Free Sample