In this episode of Inside the Network, we sit down with Tomer Weingarten, Co-Founder and CEO of SentinelOne, one of the fastest-growing cybersecurity companies. From writing code and designing the company’s first UI himself, to taking SentinelOne public and crossing $1 billion ARR, Tomer’s journey is a rare combination of technical excellence, grit, and long-term conviction.

Tomer didn’t grow up surrounded by startup founders or Silicon Valley mentors. He was raised in a small Israeli town with few resources and found computers as a creative escape. He met his SentinelOne co-founder, Almog Cohen, in second grade, began hacking games as a teenager, and exited his first startup at just 24 making millions of dollars. Then, in an unusual move, he spent all the money to reset, stay grounded and hungry to build something big. That big ambition would become SentinelOne.

When SentinelOne launched in 2013, most endpoint vendors were still focusing on signature-based antivirus, and the idea of autonomous, behavior-based prevention powered by AI sounded like science fiction. Tomer wanted to reimagine cyber defense from the ground up. The company’s early traction didn’t come easy, and it took several years of heads-down engineering effort to get to the point when the company signed its first customer and investors stopped being skeptical. Tomer believed the problem wasn’t being solved deeply enough, and he stayed patient while the market caught up.

Tomer shares how he navigated the “wartime CEO” moments like fighting off rivals with 10 times the budget, managing internal politics, and surviving near-death moments during fundraising. He reflects on how leadership styles evolve under pressure, and how the discipline of writing down decisions helped him become a better CEO. He also breaks down how founders confuse early ARR with true product-market fit, and why most security companies today are in his opinion workflow wrappers, not tech companies.

We also explore Tomer’s views on the LLM hype cycle and why he believes most of the AI noise in cybersecurity today is more marketing than the actual deep tech. Tomer believes that true moat lies in foundational models trained on real, curated telemetry, and in solving hard tech problems, not just ChatGPT integration. This episode is a deeply personal look at what it takes to build enduring companies in cybersecurity. This is one of our most honest, unfiltered founder conversations, and if you care about the art of company-building, you won’t want to miss it.

In this episode of Inside the Network, we sit down with Sumit Dhawan, CEO of Proofpoint, one of the largest private cybersecurity companies in the world. With over $2 billion in ARR, Proofpoint protects 85 of the Fortune 100 and is on a bold path toward $5 billion in revenue by 2030.

Sumit’s journey is a masterclass in modern leadership. Having graduated with degrees in engineering and business from IIT Roorkee, the University of Minnesota, and the University of Florida, Sumit led major business lines at Citrix and VMware, including overseeing VMware’s $70 billion divestiture to Broadcom, before making the leap to cybersecurity. In 2023, he joined Proofpoint as CEO and began executing an ambitious strategy: consolidate the sprawl of human-centric security, go deep instead of broad, and prepare the company for its next chapter of growth.

In our conversation, Sumit shares why he believes empathy is the most underrated CEO trait, how acting like a founder, even inside large enterprises, shaped his leadership, and what it means to have “Apple Watch governance” under Thoma Bravo. He explains how Proofpoint has evolved from email security leader to a broader platform for human and data protection, including its acquisitions of Tessian (AI-native email protection), Hornetsecurity (MSP-focused email security), and Normalyze (DSPM).

Sumit also pulls back the curtain on the AI threat landscape, including how prompt injection attacks are already targeting copilots and agents, why AI is both supercharging attackers and empowering defenders, and how Proofpoint built intent-based detection models to defend against sophisticated zero-link phishing. Finally, he lays out three categories of viable cybersecurity startups today: gap-fillers, AI defenders, and category disruptors, and why the last two are more likely to be successful.

Whether you’re scaling a cyber startup, selling into the enterprise, or navigating PE-backed growth, this episode is full of hard-earned wisdom from a leader who’s operated at every level of the stack.

In this episode of Inside the Network, we sit down with Jay Chaudhry, founder and CEO of Zscaler, one of the most valuable cybersecurity companies in the world with a market cap of over $40 billion and $3 billion in ARR.

Jay’s journey is unlike any other. Raised in a remote Indian village with no electricity, no running water, and a two-and-a-half-mile walk to school, he went on to build five companies and pioneer the modern Zero Trust cloud security model. Zscaler, his most iconic company, was launched in 2007 with $50 million of his own capital and no VC investment - a bold bet in the middle of a market downturn, at a time when few believed enterprise security could move to the cloud.

This episode is packed with powerful lessons from a founder who’s played the long game. Jay talks about the mindset he carried from his early years farming with oxen, how working alongside his wife Jyoti gave him unmatched focus and alignment, and why startups should be “a foot wide and 20 feet deep.” He explains how Zscaler rewrote not just the playbook for go-to-market in security, but also the TCP/IP stack, and the early challenges of selling Zero Trust well before the term even existed. He also shares his wisdom on why most founders pivot too late when their sales motion fails. Jay provides his view of the future of cybersecurity and the Internet itself, from why the private corporate network is dying to why firewalls will eventually go the way of mainframes.

Throughout it all, Jay shares a rare combination of conviction, humility, and self-discipline. Whether you’re a first-time founder or running a $10 billion company, this is an absolute masterclass in how to build enduring companies and stay grounded in the process.

In this episode of Inside the Network, we sit down with Michelle Zatlyn, Co-founder and President of Cloudflare, one of the most iconic Internet infrastructure companies in the world. From its launch during the depths of the 2009 financial crisis to today’s $70 billion market cap and 5 million+ customers, Cloudflare has become a cornerstone of global Internet security and performance.

Michelle’s journey is remarkable. Raised in a small farming town in Saskatchewan, Canada, she left behind plans to become a doctor and instead teamed up with Matthew Prince and Lee Holloway to tackle an audacious question: “How can we build a better Internet?” Fifteen years later, Cloudflare is the third most valuable cybersecurity company in the world, protecting millions of businesses and powering the modern web.

In our conversation, Michelle shares what it really took to build Cloudflare, why grit mattered more than expertise in the early days, how deep trust among co-founders carried them through the hardest moments, and why “just ship it” became a guiding principle that fueled rapid growth. She also reflects on how Cloudflare has avoided the innovator’s dilemma, continuing to reinvent itself even as a public company, and how AI is reshaping the web, including why she believes we need a new business model to create the right incentives for content creators in the age of large-scale AI crawlers.

In this episode of Inside the Network, we sit down with Joe Levy, CEO of Sophos, a 40-year-old cybersecurity company that has quietly become one of the most important global players, serving over 600,000 organizations and generating over $1 billion in revenue. 

Throughout his career, Joe has operated with a founder's mindset: thinking in bets, building great teams, spotting technical and market inflection points, and executing with long-term discipline. A great example is Sophos’ recent $800+ million acquisition of Dell Secureworks, adding over 1,000 new team members and significantly expanding Sophos’ managed detection and response and extended detection and response (MDR/XDR) capabilities. 

Today’s session is an exciting masterclass on how a technically astute CEO navigates demanding customers, engages positively with Private Equity giants like Thoma Bravo, and partners with MSPs globally, while building a culture of "vulnerability-based trust”. One of the most insightful statistics Joe and his team at Sophos have highlighted is that while there are over 350 million businesses worldwide, fewer than 1 in 10,000 have a CISO. 

This episode is packed with practical lessons on founder transitions, managing through personal health crises, and building resilient security organizations. For any cybersecurity founder thinking about the long game, Joe’s story is one you’ll want to hear.

As mentioned in the episode, Joe shared a curated list of books he’s been collecting over the years for his daughter, a shelf he calls “my daughter’s bookshelf.” These aren’t just bedtime stories; they’re books that have shaped Joe’s thinking about the world, passed along with personal inscriptions to provide context and reflection. Some were even introduced by his wife, Tracie, and read together as a family, like the James Herriot series, which took nearly a year to complete and left a lasting impression. This isn’t meant to be a definitive reading list - many classics, business books, and philosophical staples are intentionally left out. But it offers a deeply personal window into the stories that have mattered most to Joe as a parent, leader, and lifelong learner. He also shared a second resource: a living document of quotes, mental models, and hard-won career lessons, many of which have shaped his leadership journey and are referenced throughout the episode. You can explore both below.

• "Joe's daughter’s bookshelf"  
• Quotes & career notes

In this RSAC special episode of Inside the Network, we sit down not with one, but two remarkable guests from the center of the cybersecurity world.

First, we’re joined by Andy Cao, COO of ProjectDiscovery, a company focused on open-source vulnerability management tools, which won the "Most Innovative Startup" award at the RSA Conference 2025 Innovation Sandbox. Andy shares how ProjectDiscovery is reimagining vulnerability management in an AI-driven world, what set their pitch apart in the Innovation Sandbox, and how their attacker-first mindset is reshaping how security teams discover and fix real-world exposures. With over 1 million users and thousands of Nuclei templates, ProjectDiscovery is aiming to make vulnerability detection radically faster, smarter, and more accessible.

Then, we shift gears to talk with Dr. Hugh Thompson, Executive Chairman and Program Committee Chair of RSAC. A world-renowned security expert and longtime steward of the conference, Hugh takes us behind the curtain of what it takes to run the world’s largest cybersecurity gathering, including the bold moves that shaped this year’s Innovation Sandbox, the evolution of the RSAC brand, and the future of security thought leadership in the age of AI. And most intriguingly, Hugh gives us an exclusive answer to the question everyone’s been asking - is RSAC 2026 moving to Las Vegas?

To close, Mahendra, Sid, and Ross share their favorite moments from the show floor - the trends that caught their attention, the buzz from founders and investors, and yes, even a surprise guest spotted at the expo (spoiler: it’s not a unicorn, but maybe the GOAT?).

Whether you made it to RSAC this year or followed from afar, this episode brings you fresh insights from both the main stage and the show floor.

In this episode of Inside the Network, we sit down with Dug Song, the legendary co-founder and former CEO of Duo Security. Dug's journey is nothing short of iconic—he turned a side project into a cybersecurity powerhouse with over 50,000 customers and a $2.35 billion exit to Cisco. In a world obsessed with unicorn status and funding hype, Dug stands out as a founder who stayed grounded in values, culture, and customer empathy.

We explore Dug’s early years—from doing data entry in his father’s liquor store in West Baltimore to cutting his teeth at Arbor Networks, leaving security, and coming back to change how security is delivered. Dug was also part of the hacker collective w00w00, alongside future tech luminaries like Jan Koum (WhatsApp) and Shawn Fanning (Napster), where he honed the ethos of solving hard problems and building in community. These experiences laid the foundation for Duo, which Dug and co-founder Jon Oberheide started not with a grand business plan but a desire to democratize security and make strong authentication simple and usable for all organizations—not just the Fortune 500.

This conversation is packed with actionable lessons for founders: how to build a billion-dollar business with capital efficiency and discipline; how to prioritize user experience in security, not just infrastructure; and how to lead with integrity and build a “learning organization” that continuously improves across every function—engineering, sales, marketing, and customer success. Dug also gives an inside look at the decision to sell Duo to Cisco versus going public and what that choice meant for the company, team, and customers.

We then dive into Dug’s post-Duo chapter, where he and his wife Linh are reshaping philanthropy and backing the next generation of founders in Michigan, Detroit, and beyond. From punk rock to planetary-scale startups, Dug brings a rare mix of grit, humility, and wisdom, making this episode a must-listen for any entrepreneur. 

In this episode of Inside the Network, we sit down with Jeetu Patel, Cisco’s Executive Vice President and Chief Product Officer. Jeetu previously led Cisco’s Security and Collaboration business units. Under his leadership, these divisions have become major growth engines fueled by AI-driven innovation, strategic acquisitions, and a renewed focus on user experience.

With a market cap of $250 billion and a security business generating $10 billion in revenue, Cisco is evolving into a different kind of startup, one that moves with speed and urgency. Jeetu shares why he joined Cisco to spearhead this transformation and how the company is positioning itself in the cybersecurity space, competing with incumbents like Palo Alto Networks and Zscaler, as well as disruptors like Wiz and Cato Networks. We explore how Cisco’s $28 billion acquisition of Splunk, along with key deals like Armorblox, Isovalent, and Robust Intelligence, is reshaping its security business. Jeetu also dives into the challenges CISOs face today - tool sprawl, talent shortages, and AI-driven threats - and how Cisco plans to simplify security at scale.

For founders, Jeetu breaks down his six-vector rubric for evaluating opportunities, the key factors Cisco considers in acquisitions, and what startup leaders need to do to get Cisco’s attention. He also provides an inside look at Cisco’s legendary distribution machine and how startups can leverage it for hypergrowth. Finally, we discuss Jeetu’s concept of a "personal board" and his views on navigating geopolitical challenges in the tech industry.

Shlomo Kramer, CEO and co-founder of Cato Networks is a rare bird in the cybersecurity industry, having built three unicorns in his career. For many in the cybersecurity industry, Shlomo needs no introduction. One of the early pioneers in Israel’s cybersecurity startup ecosystem, what makes Shlomo remarkable is his ability to repeatedly build category-defining companies. He first co-founded Check Point, which pioneered the firewall category and today commands a $20 billion market cap. Then, seeing the shift to the cloud, he launched Imperva, focusing on web application security (WAF). That was his second IPO. Now with Cato Networks, he's created an entirely new category called SASE – Secure Access Service Edge – and Cato has already reached over $200 million in annual recurring revenue.

But Shlomo isn't just a builder – he's also a remarkably successful investor with an eye for transformative companies. His portfolio includes Trusteer, which IBM acquired for $1 billion, and Palo Alto Networks, in which he wrote the first angel check and sat on its board - a company now valued well over $100 billion dollars.

In this episode, we get inside the mind of the only entrepreneur we know who's on track to potentially take his third cybersecurity company public. Many founders are satisfied with one IPO, some rarely go to two and Shlomo is on track for his third IPO - a hat trick if he pulls it off. In the cybersecurity hall of fame, very few could equal what Shlomo has accomplished.

We discuss building cybersecurity companies, the evolution of the security market over the past three decades, why founders should focus on their customers instead of competitors, how building startups has changed from when Shlomo started Check Point, and many other aspects of the founder's journey. 

In this holiday episode special, we’re joined by Hamza Fodderwala, Executive Director at Morgan Stanley, where he leads cybersecurity equity coverage. He joined Morgan Stanley's software research team in early 2016 and leads coverage for public cybersecurity companies like Palo Alto Networks, CrowdStrike, Fortinet, SentinelOne, Okta, Zscaler, Cloudflare, Rapid7, Check Point, Qualys, Varonis and Tenable. Before Morgan Stanley, Hamza was an equity research associate at Susquehanna International Group covering the financial technology sector. Hamza graduated from New York University, with a Bachelor of Arts in Economics.

We dive into Hamza’s insights on the major customer buying patterns in cybersecurity throughout 2024 and what might shift in 2025. Hamza shares his observations on how the Generative AI boom is influencing product adoption in the industry, and whether enterprises are currently adopting AI security solutions. Additionally, we explore key trends from cybersecurity resellers, discuss what might unlock public equity markets for new IPOs, and which private cyber companies could go public next.

Our discussion covers the cybersecurity M&A landscape, highlighting over $50B in deal volume this year with companies like Juniper, Darktrace, Recorded Future, Synopsys, Venafi, and more all getting acquired. Finally, Hamza shares lessons for founders, offering advice on identifying areas ripe for disruption, navigating the venture funding landscape, and building resilience in a competitive industry.