ivpn

Install command: 
brew install --cask ivpn

Name: IVPN

VPN client

https://www.ivpn.net/en/apps-macos

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

Cask code: ivpn.rb on GitHub

Current version: 3.15.0

Requirements: macOS >= 10.15

Versions:

Intel tahoe 3.15.0
sequoia 3.15.0
sonoma 3.15.0
ventura 3.15.0
monterey 3.15.0
big sur 3.15.0
catalina 3.15.0

Analytics:

Installs (30 days)
ivpn 21
Installs (90 days)
ivpn 62
Installs (365 days)
ivpn 258