: After payment, log in to your account on PortSwigger.net using the credentials provided in your order confirmation email.
The standard way to get a license key is to buy an annual subscription directly from the PortSwigger Buy Page : $499 per user, per year. How To Get Burp Suite Professional License Key
Once you purchase a license key, you will receive an email with your license key and instructions on how to activate it. : After payment, log in to your account on PortSwigger
Subscriptions are typically sold on a per-user, per-year basis. : After payment