Speechly vs OpenAI Realtime API

Comparing the features of Speechly to OpenAI Realtime API

Feature
Speechly
OpenAI Realtime API

Capability Features

Automatic Formatting
Custom Vocabulary Support
Custom Voice Commands
Email Mode
Enterprise Grade Security
Enterprise Privacy Commitment
Expanded Model Support Planned
Fast Transcription Speed
Under 3 seconds
Five New Voices
5
Function Calling
Human and Automated Safety Monitoring
Interruption Handling
Long-Form Resilience
Message Mode
Multilingual Support
150+ languages
No Missed Context
No Training on Data Without Permission
Playground Access
Prompt Caching Planned
Prompt Mode
Public Beta
Reference Client Available
Six Preset Voices
6
Speech-to-Speech
Streaming Audio Inputs/Outputs
Supports Text and Audio Inputs
TextAudio
To-Do Mode
Transcription Speed
180+ words per minute
Ultra Low Latency
Voice-to-Text
WebSocket Connection
Works Across Apps

Integration Features

Agora Integration
Chat Completions API Integration
LiveKit Integration
OpenAI Node.js SDK Planned
OpenAI Python SDK Planned
Platform Integrations
GmailSlackNotionDiscord
Supported Platforms
MacOS
Supports GPT-4o
gpt-4o-realtime-preview
Twilio Voice API Integration

Limitation Features

AI Disclosure Requirement
API or Plugin Integration
Audio Only Modality (Initially)
File Formats Supported
Not specified
Lower Session Limits Tiers 1-4
Lower than 100
Minimum OS Requirements
MacOS Ventura 13.1 or higher
No Simultaneous Session Limit Anymore
Platform Limitation
MacOS only
Simultaneous Sessions Limit Tier 5
100
Usage Policy Restriction
User Limit
Not specified

Pricing Features

Approximate Audio Input Price
$0.06/minute
Approximate Audio Output Price
$0.24/minute
Free Tier
No Credit Card Required
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