The Thesis
Summary
Zscaler is a cloud security company that protects corporate data by replacing traditional office networks with a "zero trust" gatekeeper model. It generated $2.67 billion in revenue in fiscal 2025, a 23% increase over the prior year. The company now secures more than 9,400 organizations, including 45% of the Fortune 500, as businesses shift their security from physical hardware to the cloud.
The core bet on Zscaler is that its $6.1 billion contracted backlog proves it is the dominant standard for modern security, even as larger software giants try to bundle competing products. Zscaler acts as the essential checkpoint for every employee and device in a company. If it maintains high retention while successfully selling new AI and data protection tools to its existing base, earnings will compound as the cost to acquire those customers stays low. More specifically, four things need to be true:
We see Zscaler as the clear winner in the structural shift to cloud security, and the stock price of $130.04 appears to underestimate its massive scale and cash generation. The business has proven it can grow profitably while building a high wall of switching costs around its enterprise customers.
Numbers at a Glance
What does it do?
Zscaler is a hypergrowth business that earns money by charging companies an annual subscription fee to secure their employees' internet and application traffic. Instead of building a "moat" around an office with hardware firewalls, Zscaler moves the security checkpoint into the cloud. When an employee tries to access a website or a private company app, the request is routed through a Zscaler data center where it is inspected and verified. This "Zero Trust" model ensures that no user is trusted by default, regardless of their location, which is essential for a workforce that is now distributed across homes and offices.
Where does revenue come from?
The vast majority of revenue comes from multi-year subscriptions to its cloud-native security platform. The business is divided between its internet access solution, which secures traffic to the public web, and its private access solution, which replaces traditional VPNs for internal company apps. While Zscaler is based in the U.S., it has a significant global reach with roughly half of its revenue generated from international markets across Europe and Asia.
Revenue by Geography
Who are its customers?
Zscaler serves more than 9,400 total customers, with a heavy focus on the largest and most complex global enterprises. This customer base includes 45% of the Fortune 500 and over 40% of the Global 2000. The company specifically tracks high-value clients, ending the second quarter of fiscal 2026 with 728 customers that generate more than $1 million in annual recurring revenue. It also serves 3,886 customers with at least $100,000 in annual recurring revenue, reflecting a strategy that prioritizes winning large accounts that have thousands of employees to secure.
What gives it staying power?
Zscaler benefits from exceptionally high switching costs because it sits at the heart of a company's network architecture. Once an organization routes all its global traffic through Zscaler, ripping it out is a massive, risky undertaking that can disrupt daily operations. This is reflected in a net retention rate that consistently stays around 114%.
Where is it headed?
The company is making a massive strategic bet on AI-driven security to protect against increasingly sophisticated cyberattacks. Management is expanding the platform to not only secure user traffic but also to protect data and AI workloads themselves. If this works, Zscaler transforms from a simple gatekeeper into a comprehensive data protection layer that is even harder for rivals to displace.
Revenue growth remains steady at 25% year-over-year as the company scales toward a $3.3 billion annual run rate. While this is a deceleration from the 40% levels seen in prior years, the absolute dollar growth is still massive for a business of this size. This steady growth is supported by a $6.1 billion backlog of committed contracts.
Zscaler is a cash machine that converts nearly half of every revenue dollar into free cash flow. In fiscal 2025, the company generated $730 million in free cash flow, representing a 27% margin. This high cash quality allows the company to fund its global data center expansion and R&D without needing to raise outside capital.
The balance sheet is incredibly strong with a net cash position of approximately $1.6 billion. As of late 2024, the company held $2.7 billion in cash against roughly $1.1 billion in debt. This provides a massive cushion to weather any economic downturns or to acquire smaller competitors to expand the platform.
Zscaler is a financially dominant business that has successfully transitioned from "growth at any cost" to highly profitable scale.
The company's ability to land and expand within the world's largest enterprises is evidenced by 728 customers now paying over $1 million annually. This high-end segment provides a stable base of recurring revenue that is less sensitive to small-business churn.
Calculated billings growth has slowed to 13%, which can be a leading indicator of future revenue deceleration. If billings growth does not recover, it suggests that new large-scale contract signings are becoming harder to close in a more competitive market.
The cloud security market, specifically the Secure Access Service Edge (SASE) segment, is roughly $100 billion today and is growing at nearly 20% annually as companies ditch 20-year-old hardware. The market is on track to exceed $200 billion by 2028 because security is no longer optional in a world of remote work. This is a highly attractive industry where pricing power is structural; once a company trusts a provider with its entire data flow, they are rarely willing to switch just to save a few dollars. Zscaler is the established pure-play leader, giving it a massive head start in defining the standards for this shift.
The cybersecurity market is intensely competitive but rationally structured around a few large platforms rather than dozens of small tools. Barriers to entry are high because building a global network of data centers that can inspect traffic without slowing it down takes billions in capital. This high barrier protects pricing power for the top three or four players who can handle global enterprise scale.
Palo Alto Networks(PANW) is the most direct threat because they can bundle cloud security with the hardware firewalls many companies already own. Netskope competes aggressively on feature sets for data protection, while Cloudflare(NET) uses its massive network to compete on speed. The most dangerous threat is the "platformization" trend where giants like Palo Alto or Microsoft offer cloud security for "free" or as a heavily discounted bundle.
Zscaler is holding its ground and even gaining share in the largest accounts, as evidenced by its record number of $1 million-plus deals. Despite intense competition, Zscaler's focused "cloud-only" architecture remains the benchmark that hardware-legacy companies are still trying to replicate.
Zscaler's primary protection comes from massive switching costs that are deeply embedded in its customers' network architecture. When a company routes its entire global workforce through Zscaler's data centers, the operational risk of switching to a rival creates a functional lock-in. This is proven by the $6.1 billion in committed future revenue (RPO), which has grown at a 31% clip.
The combination of 80% non-GAAP gross margins and a 114% net retention rate proves this is a high-quality moat. These numbers show that Zscaler is not just winning new business but is successfully upselling more products to a customer base that has no intention of leaving. The high gross margins suggest that Zscaler has significant pricing power even when competing against larger rivals.
The moat is strengthening as Zscaler accumulates more data; its AI security tools get smarter with every petabyte of traffic it inspects. The single most important signal is the continued growth in million-dollar customers, which proves the largest companies in the world view Zscaler as an essential, long-term partner.
Consistently met or exceeded revenue and EPS guidance for over 12 consecutive quarters.
Maintained a massive $1.6B net cash position while funding R&D through cash flow.
Founder Jay Chaudhry owns a significant double-digit percentage of the company, worth billions.
Capital Allocation Track Record
Jagtar Singh Chaudhry, the company's founder, has led Zscaler from its inception to a dominant market position with a clear, consistent vision. His massive personal stake ensures his interests are perfectly aligned with shareholders, focusing on long-term market share over short-term earnings beats. The management team has shown exceptional discipline by achieving high profitability while maintaining a massive cash cushion, making them one of the most reliable operators in software.
© 2026 ClearThesis.ai · Report generated on May 31, 2026
This is an AI-generated analysis for informational purposes only and does not constitute financial advice. Data and analysis may not reflect recent developments if viewed significantly after the generation date. Always conduct your own due diligence before making any investment decisions.