signal

Install command: 
brew install --cask signal

Name: Signal

Instant messaging application focusing on security

https://signal.org/

Cask JSON API: /api/cask/signal.json

Cask code: signal.rb on GitHub

Current version: 7.66.0

Current version requires: macOS >= 11

Versions:

Intel tahoe 7.66.0
sequoia 7.66.0
sonoma 7.66.0
ventura 7.66.0
monterey 7.66.0
big sur 7.66.0

Analytics:

Installs (30 days)
signal 2,561
Installs (90 days)
signal 8,231
Installs (365 days)
signal 34,539