OpenAI Realtime API vs Willow Voice

Comparing the features of OpenAI Realtime API to Willow Voice

Feature
OpenAI Realtime API
Willow Voice

Capability Features

AI Mode
Auto Editing
Contextual Awareness
Customizable Dictionaries
Enterprise Privacy Commitment
Expanded Model Support Planned
Five New Voices
5
Function Calling
Handles Mid-Sentence Changes
HIPAA Compliance
Human and Automated Safety Monitoring
Interruption Handling
No Training on Data Without Permission
Personalized Writing Style
Playground Access
Privacy Focused
Prompt Caching Planned
Public Beta
Real-time Adaptation
Reference Client Available
Six Preset Voices
6
SOC 2 Compliance
Speech-to-Speech
Streaming Audio Inputs/Outputs
Supports Text and Audio Inputs
TextAudio
Ultra Low Latency
Understands Tone
Voice Commands
WebSocket Connection
Whispering and Noise Optimization
Works Anywhere

Integration Features

Agora Integration
Browser Compatibility
Chat Completions API Integration
Gmail Integration
iMessage Integration
LiveKit Integration
macOS Compatibility
Notion Integration
OpenAI Node.js SDK Planned
OpenAI Python SDK Planned
Slack Integration
Supports GPT-4o
gpt-4o-realtime-preview
Twilio Voice API Integration

Limitation Features

AI Disclosure Requirement
Audio Only Modality (Initially)
Language Availability Limitation
English only
Lower Session Limits Tiers 1-4
Lower than 100
No Simultaneous Session Limit Anymore
Platform Limitation
No Windows versionNo iOS version
Simultaneous Sessions Limit Tier 5
100
Usage Policy Restriction

Pricing Features

Approximate Audio Input Price
$0.06/minute
Approximate Audio Output Price
$0.24/minute
Free Tier
No Credit Card for Free Tier
No Free Tier
Paid Plan Price
$15/month
Pricing Audio Input
$100/1M tokens
Pricing Audio Output
$200/1M tokens
Pricing Cached Audio Input
$20/1M tokens
Pricing Cached Text Input
$2.50/1M tokens
Pricing Text Input
$5/1M tokens
Pricing Text Output
$20/1M tokens