They make website security regular, affordable, and easy. They crawl your site, a bit like Google, but instead of looking for text and HTML they look for common vulnerabilities in your website. They act as external hackers, picking through each access point on your website, trying to get in. If they are successful, they record where and how they did it, then report back to you! Their custom scanner combines the best (hand-picked, and hand stitched together) pieces of popular open source tools, along with other, custom tools built in-house (their "secret sauce") to provide you with the best results. They provide precise vulnerability information, including specific input requests and vulnerability locations. Once you understand what you're dealing with they will provide you with vulnerability fixes tailored toward your specific software stack.