Callbook.ai vs OpenAI Realtime API

Comparing the features of Callbook.ai to OpenAI Realtime API

Feature
Callbook.ai
OpenAI Realtime API

Capability Features

24/7 Support
Action Based on Call Results
Advanced Data Security
Automatic Call Handling
Available 24/7
Business Knowledge Customization
Call Data Analysis
Call Transfer
Custom Accent Selection
Customer Service Calls
Demo Scheduling
Enterprise Privacy Commitment
Expanded Model Support Planned
Five New Voices
5
Five Times Cheaper Than Call Center
5 times cheaper than a call center
Function Calling
Human and Automated Safety Monitoring
Interruption Handling
Lead Generation
Natural Language Calls
No Training on Data Without Permission
Personalized Assistance
Playground Access
Prompt Caching Planned
Public Beta
Reference Client Available
Sales Calls
Scenario Behavior Adjustment
Six Preset Voices
6
Speech-to-Speech
Streaming Audio Inputs/Outputs
Supported Language List
EnglishSpanishPortuguese
Supports Text and Audio Inputs
TextAudio
Ultra Low Latency
WebSocket Connection

Integration Features

Agora Integration
Chat Completions API Integration
Integration with Company Tools
LiveKit Integration
OpenAI Node.js SDK Planned
OpenAI Python SDK Planned
Supports GPT-4o
gpt-4o-realtime-preview
Twilio Number Support
Twilio Voice API Integration
Zoho CRM Integration

Limitation Features

AI Disclosure Requirement
Audio Only Modality (Initially)
Lower Session Limits Tiers 1-4
Lower than 100
No Free Trial
No Pricing Plans Listed
No Simultaneous Session Limit Anymore
Other Phone Number Support
Simultaneous Sessions Limit Tier 5
100
Usage Policy Restriction
User Authorization Requirement

Pricing Features

Approximate Audio Input Price
$0.06/minute
Approximate Audio Output Price
$0.24/minute
Custom Pricing
Custom, based on business model and budget
No Free Tier
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