Mycroft is described as 'open source voice assistant, that can be installed on Linux, Raspberry Pi, or on the Mark 1 hardware device' and is an app in the os & utilities category. There are more than 10 alternatives to Mycroft for a variety of platforms, including Linux, Android, iPhone, Mac and Windows. The best alternative is Google Assistant, which is free. Other great apps like Mycroft are Siri Shortcuts, Siri, Hound and Almond.
Siri Shortcuts deliver a quick way to get things done with your apps with just a tap or by asking Siri. The Shortcuts app enables you to create personal shortcuts with multiple steps from your favorite apps.
SEPIA is a server-based, extendable, personal, intelligent assistant. The SEPIA-Framework is a collection of open-source modules and tools that form a coherent ecosystem for self-hosted, privacy-compliant, voice-controlled applications and devices.
Presbot is a community of chatbots, an interactive version of Linkedin. Presbot provides the simplest and fastest way to create your personal and professional chatbot. Presbot employs rule based and machine learning algorithms and learns from each interaction with your end users.