Azure Bot Service vs Microsoft Bot Framework: What are the differences?
Azure Bot Service: Intelligent, serverless bot service that scales on demand. The Azure Bot Service provides an integrated environment that is purpose-built for bot development, enabling you to build, connect, test, deploy, and manage bots, all from one place; Microsoft Bot Framework: Connect intelligent bots that interact via text/sms, Skype, Slack, Office 365 mail and other popular services. The Microsoft Bot Framework provides just what you need to build and connect intelligent bots that interact naturally wherever your users are talking, from text/sms to Skype, Slack, Office 365 mail and other popular services.
Azure Bot Service and Microsoft Bot Framework can be categorized as "Chatbot Platforms &" tools.
Microsoft Bot Framework is an open source tool with 5.7K GitHub stars and 2.2K GitHub forks. Here's a link to Microsoft Bot Framework's open source repository on GitHub.