Avanan: Email Security-Reinvented. 

What We Do

Avanan is a cloud email security platform that pioneered and patented a new approach to prevent sophisticated attacks. We use APIs to scan for phishing, malware, and data leakage in the line of communications traffic. This means we catch threats missed by Microsoft while adding a transparent layer of security for the entire suite and other collaboration tools like Slack.

Avanan catches the advanced attacks that evade default and advanced security tools. Its invisible, multi-layer security enables full-suite protection for cloud collaboration solutions such as Office 365™, G-Suite™, and Slack™.  The platform deploys in one click via API to prevent Business Email Compromise and block phishing, malware, data leakage, account takeover, and shadow IT across the enterprise. Avanan replaces the need for multiple tools to secure the entire cloud collaboration suite, with a patented solution that goes far beyond any other Cloud Email Security Supplement.

Management Team


Gil Friedrich brings more than 18 years of development and leadership experience to Avanan. As ForeScout’s VP of R&D and VP of Technology, Gil expanded the company's technology into mobile security, BYOD policy, and Cloud services while developing the partner integration ecosystem. He holds a B.Sc. in Physics and an M.Sc. in Computer Science from Tel-Aviv University.


Having been with the company since its inception, Avi Zelovich was ForeScout’s VP of Product Engineering. Prior to ForeScout, he was a software engineer at RAD Guard. Avi holds a B.Sc. in Computer Science from the Academic College of Tel-Aviv and an MBA from Bar-Ilan University.


Michael Castricone is a certified public accountant with years of experience in finance, administration and operations. Before joining Avanan, Mike served as the Chief Financial Officer of several technology companies, such as Guardium, Inc. and WebLayers. Michael holds a BS in Math and Economics from UNH and a Masters in Accounting from Bentley University.


Itamar Lask brings more than 20 years of development and leadership experience to Avanan, previously serving as VP of R&D to CreditGuard and Safecharge payment gateways as well as R&D Director at Amdocs Cloud technologies. Itamar is well versed in managing mission critical, high traffic cloud based SaaS services and products. He holds a B.Sc. in Computer Science and Operations Research from Tel-Aviv University.


Don Byrne has over 20 years in information technology, serving companies including Accenture, Capgemini Ernst & Young , and Archer Daniels Midland. Before joining Avanan, Don led ForeScout's expansion into the federal market, where segment revenue grew from $250K to $6.3 million in four years. Don holds a BBA in Information Systems Management from the University of Iowa.


Roy Rotem was VP of Product Management at ForeScout, and led the company’s pivot to network access control. His previous roles include business development at Business Layers and senior development at Bay Network and Armon Networking. Most recently, he founded and served as CEO of Tazooz. Roy holds a B.Sc. In Computer Science and an MBA from Tel-Aviv University.


Michael Landewe has 15 years of startup experience as an early employee of three high-growth technology companies. He has had leadership roles in engineering, sales, marketing, and business development. He holds an MBA from New York University.

Board of Directors

Yuda Doron

Managing Partner at
Greenfield Partners

Modi Rosen

Managing Partner and Cofounder at
Magma Venture Partners

Tal Slobodkin

Managing Partner at
StageOne Ventures


About Greenfield Partners

Greenfield Partners is an Israel-based investment firm focused on early growth stage technology and tech-enabled businesses. With a dual presence in Tel Aviv and New York, the Greenfield team fuses investment and operating experience, deep local Israeli roots, and an expansive global network to support entrepreneurs in their quest to build thriving technology companies. Greenfield’s roots date back to 2016, when it was established by TPG Growth as an investment platform for early growth technology investments in Israel. An independent fund since 2020, its culture remains grounded in this heritage, bringing the rigor and depth of private equity to early growth investing. The Greenfield team continues to serve as Senior Advisors to TPG Growth, and in this context seeks opportunities for collaboration on selected large-check, growth stage investments in Israel. Besides Avanan, the fund’s portfolio companies such as include  BigPanda, Guardicore, Vast Data and Quali. More information about Greenfield Partners is available at greenfield-growth.com.

Magma Venture Partners

Magma Venture Partners is a leading Israeli venture capital firm, dedicated to investing in Israel's Information, Communications and Technology space ('ICT'), including the software, semiconductor, and new media spheres. Magma seeks bright ideas at their earliest stages, and serves as a springboard for entrepreneurs as they develop and evolve into industry leaders. Their goal is to enable a flow of innovation from the earliest stage all the way through until a company realizes its potential reach. Current and past investments include Waze, Onavo, and Magisto, among others. For more information, visit magmavc.com.

StageOne Ventures

StageOne is an early-stage technology fund, focusing mainly on enterprise and communications software ventures. The fund was founded by a professional management team, and is supported by leading institutional and private investors, both Israeli and international. For more information, visit stageonevc.com.


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