About Direct Line

The Bot Framework Direct Line channel is an easy way to integrate your bot into your mobile app, webpage, or other application. Direct Line is available in three forms:

  • Direct Line service – a global, robust service for most developers
  • Direct Line App Service Extensions – dedicated Direct Line functionality for security and performance (available in public preview)
  • Direct Line Speech – optimized for high-performance speech (GA)

You can choose which offering of Direct Line is best for you by evaluating the features each offers and the needs of your solution. Over time these offerings will be simplified.

Direct Line Direct Line App Service Extension Direct Line Speech
Availability and Licensing General availability Public preview, no SLA GA
Speech recognition and text-to-speech performance Standard Standard High performance
Supports legacy web browsers Yes At GA Yes
Bot Framework SDK support All v3, v4 v4.63+ required v4.63+ required
Client SDK support JS, C# JS, C# C++, C#, Unity, JS
Works with Web Chat Yes Yes No
VNET No Preview No

Additional resources