Microsoft Copilot for Windows vs iSpeech TTS & Speech API

Comparing the features of Microsoft Copilot for Windows to iSpeech TTS & Speech API

Feature
Microsoft Copilot for Windows
iSpeech TTS & Speech API

Capability Features

API Requests per Month
100000000
Automatic Conversation End
Chime Notification
Cloud and Embedded TTS
Copilot Voice Floating UI
Copilot Wake Word
Create IVR Prompts
Custom Voice Cloning
Developer Signups
80000
Feedback Mechanism
Hands-Free Voice Activation
Manual Conversation End
Mic Usage Indicator
On-Device Wake Word Detection
Open Source SDKs
SDK Availability
Speech Rate Adjustment
SlowRegularFast
Speech Recognition
Supported Language List
US EnglishUK EnglishAustralian EnglishUS SpanishChineseHong Kong ChineseTaiwan ChineseJapaneseKoreanCanadian EnglishHungarianBrazilian PortugueseEuropean PortugueseEuropean SpanishEuropean CzechEuropean DanishEuropean FinnishEuropean FrenchEuropean NorwegianEuropean DutchEuropean PolishEuropean ItalianEuropean TurkishEuropean GreekEuropean GermanRussianSwedishCanadian FrenchArabic
Talking Stickers
Text to Speech

Integration Features

Audiobook Support
Chrome Extension
Connected Vehicle Integration
Microsoft Store Update
Mobile Integration
SAPI Integration

Limitation Features

Feature Not Default
Internet Required for Voice Responses
No Local Audio Storage
Registration Required for Downloads
Requires PC Unlocked
TTS for Non-Commercial Use Only
Version Requirement
1.25051.10.0 or higher
Wake Word Only in English
English only
Windows Insider Availability
Insiders only

Pricing Features

Free Tier
IVR Prompts Free Sample