Zscaler (NASDAQ: ZS) closed fiscal 2026 with a quarter that beat on both revenue and earnings. The real story for investors, however, is the margin profile and what it signals about the company's strategic priorities.
Revenue rose 25% year over year to $898.2 million, topping the $877 million consensus by about $21 million. Non-GAAP diluted EPS of $1.19 surged 34% from $0.89 a year ago and exceeded the $1.09 estimate by $0.10. Clean headline numbers, but the composition of the beat matters more.
The margin story is the quarter's most significant development. Non-GAAP operating margin hit a record 24%, up from 22% in Q4 FY25. That 200-basis-point expansion came despite a GAAP operating loss of $15.5 million, which narrowed from a $32.2 million loss a year ago. The gap between GAAP and non-GAAP remains wide, driven by $215.2 million in stock-based compensation and related payroll taxes in the quarter alone. The non-GAAP trajectory is unambiguous: Zscaler is extracting more operating leverage from its revenue base.
Annualized recurring revenue (ARR) reached $3.77 billion, also up 25% year over year. Excluding the Red Canary acquisition, which contributed $141 million in ARR, organic ARR growth was 20%. That organic figure is a more honest read of the core business momentum. Large-deal activity hit a record, and management highlighted traction in non-seat-based solutions and Z-Flex, suggesting the growth engine is broadening beyond the traditional user-based subscription model.
Free cash flow margin for the quarter was just 7%, down sharply from 24% a year ago. The drop is almost entirely explained by $218.5 million in capex and capitalized internal-use software, versus $78.7 million in the prior-year quarter. For the full fiscal year, free cash flow margin was 23%, down from 27% in FY25. The elevated capex is likely tied to data center expansion and AI infrastructure investments, which management explicitly linked to the "agentic AI" opportunity in the CEO's prepared remarks. The full-year free cash flow margin of 23% is still healthy, but the quarterly volatility bears watching.
Guidance for FY27 is where the strategic tension becomes visible. Revenue is expected to be $3.908 billion to $3.938 billion, implying growth of 16.6% to 17.5%. That is a material deceleration from the 25% growth delivered in FY26. Non-GAAP EPS guidance of $4.86 to $4.90 implies roughly 16% growth at the midpoint, while non-GAAP operating income is guided to grow about 21%. The company is trading top-line growth for margin expansion, and the guidance makes that trade explicit.
The implied deceleration is not necessarily a warning sign. Zscaler is lapping a year that included the Red Canary acquisition, which added a full-year contribution in FY26 that will not repeat at the same scale. Organic ARR growth of 20% in Q4, excluding Red Canary, suggests the underlying business is still growing at a healthy clip. But the guidance range implies organic revenue growth in the mid-to-high teens, a step down from the 20% organic growth the company reported for the full year.
Q1 FY27 guidance of $935 million to $939 million in revenue, representing roughly 19% year-over-year growth, is consistent with the full-year trajectory. Non-GAAP EPS of $1.15 to $1.16 for Q1 would be roughly flat to slightly down from the $1.19 reported in Q4, reflecting normal seasonality and continued investment.
The non-GAAP tax rate shift from 23% to 21%, driven by the enactment of the One Big Beautiful Bill Act, provided a modest tailwind to EPS comparisons. The company applied the new rate prospectively starting in fiscal 2026, which means the full-year FY26 non-GAAP EPS of $4.21 benefited from the lower rate versus the prior-year period.
What to watch next: the pace of free cash flow conversion as capex normalizes, and whether the organic ARR growth rate stabilizes in the 20% range or drifts lower toward the guided revenue growth rate. The record non-GAAP operating margin is a positive signal, but it comes as the company deliberately slows its top-line growth. For a stock trading at roughly 7x forward revenue, the market is pricing in that margin expansion. The question is whether the growth deceleration will be shallower than guidance implies, or whether the margin gains will prove durable enough to offset it.