missive

Install command: 
brew install --cask missive

Name: Missive

Team inbox and chat tool

https://missiveapp.com/

/api/cask/missive.json (JSON API)

Cask code on GitHub

Current version: 10.64.1

Analytics:

Installs (30 days)
missive 11
Installs (90 days)
missive 25
Installs (365 days)
missive 103
Fork me on GitHub