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iSpeech TTS & Speech API
Compared to Vapi
iSpeech TTS & Speech API vs Vapi
Comparing the features of iSpeech TTS & Speech API to Vapi
Feature
iSpeech TTS & Speech API
Vapi
Capability Features
A/B Experiments
AI Guardrails
API Access
API Configurability
4.2K+ configuration points
API Requests per Month
100000000
API-First Architecture
Automated Test Execution
Automatic Scalability
Millions of calls
Bring Your Own Models
Cloud and Embedded TTS
Community Support
13000
Create IVR Prompts
Custom Phone Number
Custom Voice Cloning
Dedicated Deployment Engineer
Developer Signups
80000
Documentation
Enterprise Compliance
SOC2
HIPAA
PCI
Inbound Calls
Multi-language Support
100+ languages
No-code/Low-code Workflow
Open Source SDKs
Outbound Calls
Prebuilt Templates
1000s
SDK Availability
Speech Rate Adjustment
Slow
Regular
Fast
Speech Recognition
Supported Language List
US English
UK English
Australian English
US Spanish
Chinese
Hong Kong Chinese
Taiwan Chinese
Japanese
Korean
Canadian English
Hungarian
Brazilian Portuguese
European Portuguese
European Spanish
European Czech
European Danish
European Finnish
European French
European Norwegian
European Dutch
European Polish
European Italian
European Turkish
European Greek
European German
Russian
Swedish
Canadian French
Arabic
Talking Stickers
Text to Speech
Tool Calling
Ultra-low Latency
Sub-500ms
Uptime SLA
99.99% uptime
Integration Features
Audiobook Support
Chrome Extension
Client SDK
React (web SDK)
Connected Vehicle Integration
Downloadable SDK ZIP
Github Repository
Integrations Information
40+ apps
Mobile Integration
OpenAI Integration
openai
gpt-4o
SAPI Integration
Server SDKs
TypeScript
Python
cURL
Limitation Features
No Built-in Telephony Provider Mentioned
No Explicit Pricing Details
No Explicit Usage Quotas Listed
No File Format Support Listed
Registration Required for Downloads
TTS for Non-Commercial Use Only
Pricing Features
Free Tier
IVR Prompts Free Sample