Is ZS a Buy? What to Consider in 2026
Last updated June 2026
Short answer
There is no universal answer to whether ZS is a buy; it depends on your thesis, time horizon, and what you already own. Below is the case for Zscaler, the main risks to weigh, where the stock trades, and a framework to decide for yourself. This is informational, not a recommendation, and Walnut is not an investment adviser.
Zscaler is a cloud-native cybersecurity company built around the zero trust security model. Instead of routing traffic through a traditional corporate network perimeter, Zscaler operates a globally distributed cloud platform that sits between users and the applications they access, inspecting traffic and enforcing security policy in real time. Its two flagship products are Zscaler Internet Access (ZIA), which secures connections to the public internet and SaaS apps, and Zscaler Private Access (ZPA), which connects users directly to private applications without exposing the corporate network. The company makes money through subscriptions priced per user, so revenue grows as customers add seats and adopt more modules. Zscaler has expanded beyond core access into data protection, cloud security posture, and AI-driven analytics. Founded in 2007 by Jay Chaudhry, who remains CEO and a large shareholder, the company is headquartered in San Jose, California.
The case for Zscaler
1. Zero trust replacing legacy perimeter.
The structural tailwind is the shift away from castle-and-moat network security (firewalls and VPNs) toward zero trust, where every connection is verified. Hybrid work and SaaS adoption broke the old perimeter model, and Zscaler is a category leader positioned to displace legacy appliance vendors as enterprises modernize.
2. Platform expansion and upsell.
Zscaler started with secure internet access but has added private access, data loss prevention, cloud posture management, and AI analytics. This expands the addressable spend per customer and lifts net revenue retention, since existing customers buy more modules over time without a new sales cycle.
3. Large enterprise and government traction.
Zscaler has won large multinational and federal customers, including FedRAMP-authorized deployments. Big enterprises generate large, sticky contracts and many seats, and government wins validate the platform for security-sensitive buyers, supporting a long expansion runway in regulated sectors.
4. AI as both feature and demand driver.
Zscaler positions AI two ways: securing enterprise use of generative AI tools and applying AI to its own threat detection across the traffic it inspects. Its huge daily transaction volume is a data advantage for training detection models, a differentiator versus appliance-based competitors.
The risks to weigh
Zscaler trades at a high revenue multiple, so any deceleration in growth or billings can compress the stock sharply. Competition is intensifying: Palo Alto Networks, Cisco, Cloudflare, and Microsoft all push secure access service edge (SASE) offerings, and Microsoft can bundle security into existing enterprise agreements at aggressive prices. Sales cycles for large deals can lengthen in tighter IT budget environments. The company has historically run GAAP losses due to heavy stock-based compensation, which dilutes shareholders even as free cash flow is positive. Founder-CEO concentration and a premium valuation amplify volatility around quarterly results.
Valuation context (as of early 2026)
- Revenue (TTM): ~$2.7 billion
- Revenue growth: ~20% year over year
- Operating margin (GAAP): ~low single digits or near breakeven
- Operating margin (non-GAAP): ~20%
- Free cash flow: ~$700 million annually
- Price to sales: ~12-15x
- Dividend yield: None (no dividend)
- Cash and investments: ~$2.5 billion (modest convertible debt)
Zscaler trades at a premium price-to-sales multiple typical of high-growth cloud security names, reflecting durable subscription revenue and strong free cash flow despite thin GAAP profitability. The valuation is sensitive to billings and net retention trends; a slowdown in growth or rising competitive pressure would compress the multiple quickly.
How to decide for yourself
Rather than asking whether ZS is a buy in the abstract, it tends to help to answer four questions:
- Thesis: do you believe the case above, and is it still true today?
- Time horizon: a single stock can be volatile, so a longer horizon absorbs more of the swings.
- Position sizing: a thesis can be right and the sizing still wrong; decide how much of your portfolio one name should be.
- Overlap: check whether you already hold ZS indirectly through an index or sector ETF before adding more.
For the full picture, see the ZS stock guide (what the company does, the ETFs that hold it, similar stocks, and the themes it fits). In Walnut you can ask its AI about ZS against your real portfolio and see your actual exposure before deciding.
Build a basket around ZS with Walnut
Use Zscaler as one constituent in a thematic basket Walnut's AI helps you assemble. Describe a thesis you believe in, the AI proposes the holdings and weights, and you approve before any broker order.
FAQ
Is ZS a good stock to buy right now?
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There is no universal answer. Whether Zscaler fits depends on your thesis, time horizon, risk tolerance, and what you already own. This page lays out the case for, the main risks, and where the stock trades, so you can decide for yourself. Walnut is not an investment adviser and this is not a recommendation.
What does Zscaler do?
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Cloud-native zero trust cybersecurity leader securing user-to-app access; a core holding in cybersecurity baskets.
What are the main risks of ZS?
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Zscaler trades at a high revenue multiple, so any deceleration in growth or billings can compress the stock sharply. Competition is intensifying: Palo Alto Networks, Cisco, Cloudflare, and Microsoft all push secure access service edge (SASE) offerings, and Microsoft can bundle security into existing enterprise agreements at aggressive prices. Sales cycles for large deals can lengthen in tighter IT budget environments. The company has historically run GAAP losses due to heavy stock-based compensation, which dilutes shareholders even as free cash flow is positive. Founder-CEO concentration and a premium valuation amplify volatility around quarterly results.
What is Zscaler's ticker symbol?
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ZS, listed on Nasdaq. Officially Zscaler, Inc. Founded in 2007 by Jay Chaudhry, headquartered in San Jose, California. The company went public in 2018 and trades during US market hours.
What does Zscaler do?
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Zscaler is a cloud-native cybersecurity company built on the zero trust model. It runs a global cloud platform that sits between users and applications, inspecting traffic and enforcing policy. Its main products are Zscaler Internet Access (ZIA) for internet and SaaS connections and Zscaler Private Access (ZPA) for private applications, sold as per-user subscriptions.
Who are Zscaler's main competitors?
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Palo Alto Networks (Prisma Access) is the largest direct SASE competitor. Cloudflare, Netskope, and Cisco offer overlapping cloud security and zero trust access. Microsoft competes through its Entra and Defender suite, often bundled into enterprise agreements. Fortinet, Broadcom (Symantec), and Check Point compete from the legacy network security side.
Is Zscaler a cybersecurity stock?
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Yes. Zscaler is one of the pure-play cloud cybersecurity leaders, focused specifically on zero trust secure access. It is frequently grouped with Palo Alto Networks, CrowdStrike, Fortinet, and Cloudflare as a core holding in cybersecurity themes and ETFs.
Walnut is informational and is not an investment adviser. This page is educational and not a recommendation to buy or sell ZS; figures are approximate and dated, and your own situation, time horizon, and risk tolerance should drive any decision. Verify current data before investing.