Source Defense Partners with Prevalent to Extend Visibility into Third Party Web Vulnerabilities USA - English News provided by Share this article Source Defense, the market leader in client-side web security, today announced its partnership with Prevalent, the company that takes the pain out of third-party risk management, to identify threats and protect online businesses against automated and client-side attacks exploiting third-party code and website access. Prevalent and Source Defense's joint solution offers deeper visibility on the true array of code and vendor relationships powering websites, with automated policy enforcement and remediation features to defeat malicious activity and prove regulatory compliance.