ChatTTS vs Vapi

Comparing the features of ChatTTS to Vapi

Feature
ChatTTS
Vapi

Capability Features

A/B Experiments
AI Guardrails
API Access
API Configurability
4.2K+ configuration points
API-First Architecture
Automated Test Execution
Automatic Scalability
Millions of calls
Bring Your Own Models
Community Support
13000
Continuous Improvement
Controllability and Security
Custom Phone Number
Dedicated Deployment Engineer
Detailed Documentation
Dialog Task Optimization
Documentation
Easy to Use
Enterprise Compliance
SOC2HIPAAPCI
Fine-tuning Supported
Full Model Training Hours
100000
High-Fidelity Speech Synthesis
Inbound Calls
Multi-language Support
100+ languages
Multilingual Support
ChineseEnglish
No-code/Low-code Workflow
Open Source
Open Source Model Training Hours
40000
Outbound Calls
Prebuilt Templates
1000s
Sample Rate for Audio Output
24000
Text to Speech
Tool Calling
Ultra-low Latency
Sub-500ms
Uptime SLA
99.99% uptime
Voice Customization Options

Integration Features

API Integrations
Client SDK
React (web SDK)
Downloadable SDK ZIP
Github Repository
Gradio Demo Integration
Integrations Information
40+ apps
OpenAI Integration
openaigpt-4o
Platform Compatibility
Web applicationsMobile appsDesktop softwareEmbedded systems
PyTorch Dependency
SDK Programming Language Support
Multiple programming languages
Server SDKs
TypeScriptPythoncURL

Limitation Features

No Built-in Telephony Provider Mentioned
No Explicit Pricing Details
No Explicit Usage Quotas Listed
No File Format Support Listed
Not All Languages Supported
Requires Significant Compute
High computational resources needed
Speech Quality Depends on Input
Varies with text complexity and length

Pricing Features

Free Tier
No Explicit Paid Plans Shown