Lemonfox.ai Speech‑to‑Text API vs OpenAI Realtime API

Comparing the features of Lemonfox.ai Speech‑to‑Text API to OpenAI Realtime API

Feature
Lemonfox.ai Speech‑to‑Text API
OpenAI Realtime API

Capability Features

API Documentation URL
Data Privacy Focus
Developer Usage
Enterprise Privacy Commitment
EU-based Processing
Expanded Model Support Planned
Fast Transcription Speed
Five New Voices
5
Function Calling
High Accuracy
Whisper large-v3
Human and Automated Safety Monitoring
Interruption Handling
No Training on Data Without Permission
Non-Developer Tool
Transcripo
Playground Access
Prompt Caching Planned
Public Beta
Reference Client Available
Six Preset Voices
6
Speaker Recognition
Speech to Text
Speech-to-Speech
Streaming Audio Inputs/Outputs
Supported Language List
100+
Supports Text and Audio Inputs
TextAudio
Text to Speech
Translation Option
Ultra Low Latency
WebSocket Connection

Integration Features

Agora Integration
Chat Completions API Integration
LiveKit Integration
OpenAI Node.js SDK Planned
OpenAI Python SDK Planned
Supports GPT-4o
gpt-4o-realtime-preview
Twilio Voice API Integration

Limitation Features

AI Disclosure Requirement
Audio Only Modality (Initially)
Lower Session Limits Tiers 1-4
Lower than 100
No Simultaneous Session Limit Anymore
Simultaneous Sessions Limit Tier 5
100
Usage Policy Restriction

Pricing Features

Additional Credits Price
$0.50 per 1M credits
Additional Speech-to-Text Hours per Credit
3
Additional Text-to-Speech Characters per Credit
200000
Approximate Audio Input Price
$0.06/minute
Approximate Audio Output Price
$0.24/minute
First Month Free
Included Speech-to-Text Hours
30
Included Text-to-Speech Characters
2000000
Minimum Price per Hour
less than $0.17/hour
Monthly Subscription
$5/month
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