KEYCHEST is a cloud service. It has a global database of all internet SSL / HTTPS certificates to automatically discover all your internet subdomains as you keep creating them.
The ENTERPRISE license includes software agents. These are lightweight proxies that allow KEYCHEST audit your internal networks. These agents are available as Windows service (an executable file). We also provide them as a platform agnostic Python packages that you can install with standard Python packaging commands (e.g., "pip") - https://pypi.org/project/keychest-agent/.