Burp Suite Free Edition contains everything you need to carry out manual security testing of web applications. You can:
Burp Suite Professional contains numerous powerful features to make your work faster and more effective, letting you find more vulnerabilities in a shorter time. You can:
"People always say, ‘I didn’t know Burp could do that’. This is no surprise, as Burp is constantly evolving to lead the pack."
Robert Hansen, CEO, SecTheory
"I routinely use commercial tools costing orders of magnitude more money, and find there is no substitute for the scanning provided by Burp Suite Pro."
Albert School, Penetration Tester
"Burp Suite Pro is easily the best app-sec tool on the market. It is small, lightweight, portable, extremely functional and extensible. On top of that, it’s affordable and has new release roughly once a month. And... it just works. Definitely a keeper."
"What makes Burp Suite Pro different from the competition is that it’s written by someone who actually uses it."
Benjamin Boeck, www.taurosec.com