WhisperUI vs Vapi

Comparing the features of WhisperUI to Vapi

Feature
WhisperUI
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
Batch File Upload
Bring Your Own Models
Community Support
13000
Custom Phone Number
Dedicated Deployment Engineer
Desktop Version
Documentation
Drag & Drop Upload
Edit Transcription
Enterprise Compliance
SOC2HIPAAPCI
Export SRT Subtitles
Fast Transcription Speed
Most files within a few minutes
File Browse Upload
High Accuracy Model
High (depends on audio quality)
Inbound Calls
Multi-language Support
100+ languages
Multi-Language Transcription
No-code/Low-code Workflow
Outbound Calls
Prebuilt Templates
1000s
Speech to Text
Supported Language List
EnglishSpanishFrenchGermanChineseand more
Text to Speech
Tool Calling
Translation to English
Ultra-low Latency
Sub-500ms
Unlimited Daily Uploads
Uptime SLA
99.99% uptime

Integration Features

Client SDK
React (web SDK)
Downloadable SDK ZIP
Github Repository
Integrations Information
40+ apps
OpenAI Integration
openaigpt-4o
Server SDKs
TypeScriptPythoncURL
Supported Audio Types
mp3mp4mpegmpgam4awavoggwebm

Limitation Features

File Size Limit
25
No Built-in Telephony Provider Mentioned
No Explicit Pricing Details
No Explicit Usage Quotas Listed
No File Format Support Listed
No Internal Billing
OpenAI API Key Required
Web App Only

Other Features

API Key Stored Locally

Pricing Features

Direct API Usage Billing
OpenAI API usage billing
Free Tier
Has Free Tier
Premium Plan Features
Upload multiple files at onceUnlimited daily files uploadTransform audio files into SRT files