Where to Get assistance on the Mac desktop
siri Free apple.com
Siri has been part of macOS since Sierra. Just click its menu bar icon, or hold Cmd+[spacebar]. On the latest MacBook Air/Pro and iMac Pro, you can also activate it by saying “Hey Siri”.
reverb Free reverb.ai
Reverb hooks into Amazon’s online Alexa API (application programming interface) to bring the assistant’s “lite” version to your desktop. It’s a little awkward to use, but it works well.
Macassistant Free github.com/vanshg/ MacAssistant
You’ll need a Google developer account to be able to build the code, but it’s a really neat menu bar shortcut to Google Assistant.