About Source Defense

Third-party companies are often the most vulnerable link in an organization security chain and almost always the least controlled one. Instead of targeting large websites directly, various attacks have shown how effective it is to target vulnerabilities in third-party companies. We constantly see that using third-party companies as the attack vector is on the rise, expecting to keep growing.

In an industry focused on detection, Source Defense provides websites with the first ever
prevention technology for attacks of third-party origin. We are the first ever SAAS platform that allows a site owner to set and enforce permissions, receive real time alerts and monitor third-party vendors' behavior on their site. By removing the security considerations from third-party integrations, we can save countless man-hours spent on tests and integrations, allowing sites to focus on generating revenues and new opportunities while keeping the site visitors safe and the site in high performance.


Our team was tailored to understand the full weight of the third-party script danger and has a unique perspective on the third-party ecosystem. Each of our leaders experienced the pains of working with third-party scripts from multiple angles, working in both technology companies manufacturing third-party solutions, and the sites that incorporate them.

Hadar Blutrich - CEO & Co-founder

As the CEO of the Source Defense, Hadar brings more than 15 years of varied executive experience, leading teams and developing multiple out of the box solutions. Formerly Chief Solution Architect at LivePerson global sales and alliances team, Hadar's can do approach helped to close contracts worth millions of dollars. A technology leader, leading projects with industry giants such as Bank of America, Chase, and others working closely with their R&D and security teams.

Ross Hogan - GM US Office & Chief Revenue Officer

Ross Hogan is a global cybersecurity executive specialized in executive leadership, global sales management, and corporate strategy. Ross has led multiple high-growth, high-profile cybersecurity startups to global success, delivered exceptional results for his customers, and returned extraordinary value to shareholders. Prior to Source Defense, Ross provided executive advisory to the leadership teams of multiple early stage cybersecurity startups, served as the Global Head of the Fraud Prevention Business at Kaspersky Lab, and Directed Channels and Partners for Trusteer (now an IBM company).

Avital Grushkovski - EVP Product & PS & Co-founder

Avital is a product leader, with a proven track record of delivering out of the box solutions from concept to market and keeping the product in the spearhead of its area. With a rich history of creating and leading professional services teams, He is a strong believer in understanding what the client needs rather than asking what they want. Before co-founding Source Defense, Avital led the product and professional services of two ad server companies, and lead the integration work of multiple startups and technological solutions in a major publisher.

Mark Bermingham - Vice President, Marketing

Mark brings more than 20 years of experience developing marketing strategy having served in senior marketing and product management roles at numerous high-tech firms. He oversees Source Defense’s global marketing efforts, from product marketing to global brand development and channel enablement bringing a wealth of experience in go-to-market and marketing strategy, product marketing and positioning, public relations and analyst relations. Mark is a graduate of UCLA’s Anderson School.

Eido Gavish - Head of R&D

Eido started programming at age 8, he has worked for major publishers, cutting edge ad-server companies and has led technical teams in building anything from desktop applications, web applications, eCommerce sites and content sites. He has worked with the private, financial and government sector and is a leader in his field.

Board Members

Yoav Tzruya

With his hands on approach to working with the numerous portfolio companies, Yoav sits on the board of several of JVP’s companies. Past exits include CyActive, acquired by PayPal in March 2015. Prior to joining JVP, Yoav headed venture capital consulting business, Altus Media, and ahead of that, spent five years as General Manager/COO and CMO of Exent Technologies. Prior to this, Yoav held executive positions with TeleKnowledge, an innovator in business support systems. Yoav spent six years in the Israeli Air Force, managing mission critical development projects including in the “enterprise” control, command & security space, and is a decorated officer. Yoav holds a B.Sc. in Mathematics (cum laude) and an MS in Computer Science (cum laude) from Tel-Aviv University, as well as an Executive MBA from the Kellogg School of Management’s international program.

Dr. Nimrod Kozlovski

With a strong legal and technological background, Nimrod consults to numerous governmental, business and financial organizations as well as international security bodies on information security and proactive security. Co-founder of two start-ups, PLYmedia and Altal Security, Nimrod also co-launched the Information Security and Cyber Security program as part of the MBA in Information Technologies in Tel Aviv University. He received his doctor degree in law (JD) from Yale Law School and conducted his Post-Doc research in computer science on proactive security at Yale School of Computer Sciences. In the Israel Defense Forces, Nimrod served as Captain in the Electronic Warfare unit. Nimrod was an adjunct professor at New York Law School and has written books and articles on Internet Law, Cyber Crime and Digital Law Enforcement and Copyright Law.


Jerusalem Venture Partners

Jerusalem Venture Partners’ investment strategy is spearheaded by a deep expertise in identifying opportunities from inception and growing them into global industry leaders. Through our theme-driven focus and strong network of strategic partners, we seek to stay ahead of the latest market trends and address the most relevant market needs. Our unique Centers of Excellence and dedicated team ensure we effectively deliver this added value directly to each of our current and prospective portfolio companies.

SixThirty Cyber

Backed by CISOs and other corporate executives,SixThirty CYBER is a business development accelerator that works with a handful of cyber security-based technology startup companies each year. The selected companies receive hands-on training, mentoring, and networking opportunities with the top CISOs and executives of regional private companies.