Priority Pass' corporate sales pitch is here:
https://www.prioritypass.com/en/for-.../for-employees
Corporate Membership rates apply only to companies with 10 or more members of staff traveling regularly. If you are enquiring for 1-9 memberships, please contact our Membership Services Teams.
While Priority Pass's network is large, note that there is no access to lounges operated by American, Delta, United and access to lounges operated by Alaska Airlines is limited.