If the Community Edition doesn't meet your needs and you cannot afford Professional, consider these open-source alternatives that are completely free and safe:
Searching for a Burp Suite Professional license key on GitHub is a high-risk activity with zero reward. Protect your machine and your professional reputation by sticking to the Community Edition or moving to a fully open-source alternative like OWASP ZAP. Burp Suite Professional License Key Github - Google
So, how do you get your hands on a Burp Suite Professional license key? There are a few different options: If the Community Edition doesn't meet your needs