Comprehensive Stock Comparison
Compare Rubrik, Inc. (RBRK) vs Zscaler, Inc. (ZS) Stock
Analyze side-by-side fundamentals, valuation, growth, and profitability to decide which stock is the better buy.
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Quick Verdict
| Category | Winner | Why |
|---|---|---|
| Growth | RBRK | 41.2% revenue growth vs ZS's 23.3% |
| Value | ZS | Better valuation composite |
| Quality / Margins | ZS | -2.3% net margin vs RBRK's -31.5% |
| Stability / Safety | ZS | Beta 1.27 vs RBRK's 1.89 |
| Dividends | Tie | Neither pays a meaningful dividend |
| Momentum (1Y) | RBRK | -20.2% vs ZS's -25.1% |
| Efficiency (ROA) | ZS | -1.0% ROA vs RBRK's -14.8% |
Who Each Stock Is For
Income & stability
Growth exposure
Long-term compounding (10Y)
Sleep-well-at-night portfolio
Defensive / Recession hedge
Business Model
What each company does and how it makes money
Rubrik is a data security company that provides cloud data management and ransomware protection solutions for enterprises. It generates revenue primarily through subscription-based software licenses — around 90% of its income — with the remainder from professional services and support. The company's key advantage is its zero-trust architecture and unified platform that consolidates data protection, security, and compliance across hybrid cloud environments.
Zscaler is a cloud-native security platform that provides secure internet and private application access without traditional network hardware. It generates revenue primarily through subscription fees for its Zero Trust Exchange platform — with its core Zscaler Internet Access and Zscaler Private Access solutions driving most of its business. The company's key advantage is its massive, globally distributed cloud architecture that processes over 300 billion daily transactions, creating significant scale and data advantages that competitors cannot easily replicate.
Revenue Breakdown by Segment
How each company's revenue is distributed across its business units
Financial Metrics Comparison
Side-by-side fundamentals across 2 stocks. BestLagging
Financial Scorecard
ZS leads in 2 of 6 categories (Valuation Metrics, Profitability & Efficiency). RBRK leads in 1 (Total Returns). 2 tied.
Financial Metrics (TTM)
ZS is the larger business by revenue, generating $3.0B annually — 2.5x RBRK's $1.2B. ZS is the more profitable business, keeping -2.3% of every revenue dollar as net income compared to RBRK's -31.5%. On growth, RBRK holds the edge at +48.3% YoY revenue growth, suggesting stronger near-term business momentum.
| Metric | RBRKRubrik, Inc. | ZSZscaler, Inc. |
|---|---|---|
| RevenueTrailing 12 months | $1.2B | $3.0B |
| EBITDAEarnings before interest/tax | -$340M | -$52M |
| Net IncomeAfter-tax profit | -$377M | -$68M |
| Free Cash FlowCash after capex | $260M | $944M |
| Gross MarginGross profit ÷ Revenue | +79.3% | +76.6% |
| Operating MarginEBIT ÷ Revenue | -31.7% | -4.8% |
| Net MarginNet income ÷ Revenue | -31.5% | -2.3% |
| FCF MarginFCF ÷ Revenue | +21.7% | +31.4% |
| Rev. Growth (YoY)Latest quarter vs prior year | +48.3% | +25.9% |
| EPS Growth (YoY)Latest quarter vs prior year | +55.1% | -3.2% |
Valuation Metrics
| Metric | RBRKRubrik, Inc. | ZSZscaler, Inc. |
|---|---|---|
| Market CapShares × price | $10.4B | $23.6B |
| Enterprise ValueMkt cap + debt − cash | $10.6B | $23.0B |
| Trailing P/EPrice ÷ TTM EPS | -6.95x | -544.41x |
| Forward P/EPrice ÷ next-FY EPS est. | — | 36.83x |
| PEG RatioP/E ÷ EPS growth rate | — | — |
| EV / EBITDAEnterprise value multiple | — | — |
| Price / SalesMarket cap ÷ Revenue | 11.73x | 8.83x |
| Price / BookPrice ÷ Book value/share | — | 12.61x |
| Price / FCFMarket cap ÷ FCF | 331.78x | 32.48x |
Profitability & Efficiency
On the Piotroski fundamental quality scale (0–9), RBRK scores 6/9 vs ZS's 4/9, reflecting solid financial health.
| Metric | RBRKRubrik, Inc. | ZSZscaler, Inc. |
|---|---|---|
| ROE (TTM)Return on equity | — | -3.1% |
| ROA (TTM)Return on assets | -14.8% | -1.0% |
| ROICReturn on invested capital | — | -8.4% |
| ROCEReturn on capital employed | -3.3% | -4.6% |
| Piotroski ScoreFundamental quality 0–9 | 6 | 4 |
| Debt / EquityFinancial leverage | — | 1.00x |
| Net DebtTotal debt minus cash | $164M | -$592M |
| Cash & Equiv.Liquid assets | $186M | $2.4B |
| Total DebtShort + long-term debt | $351M | $1.8B |
| Interest CoverageEBIT ÷ Interest expense | -13.10x | 8.97x |
Total Returns (with DRIP)
A $10,000 investment in RBRK five years ago would be worth $14,043 today (with dividends reinvested), compared to $6,994 for ZS. Over the past 12 months, RBRK leads with a -20.2% total return vs ZS's -25.1%. The 3-year compound annual growth rate (CAGR) favors RBRK at 12.0% vs ZS's 3.9% — a key indicator of consistent wealth creation.
| Metric | RBRKRubrik, Inc. | ZSZscaler, Inc. |
|---|---|---|
| YTD ReturnYear-to-date | -31.2% | -33.4% |
| 1-Year ReturnPast 12 months | -20.2% | -25.1% |
| 3-Year ReturnCumulative with dividends | +40.4% | +12.1% |
| 5-Year ReturnCumulative with dividends | +40.4% | -30.1% |
| 10-Year ReturnCumulative with dividends | +40.4% | +345.4% |
| CAGR (3Y)Annualised 3-year return | +12.0% | +3.9% |
Risk & Volatility
ZS is the less volatile stock with a 1.27 beta — it tends to amplify market swings less than RBRK's 1.89 beta. A beta below 1.0 means the stock typically moves less than the S&P 500. RBRK currently trades 50.4% from its 52-week high vs ZS's 43.6% drawdown — a narrower gap to the peak suggests stronger recent price momentum.
| Metric | RBRKRubrik, Inc. | ZSZscaler, Inc. |
|---|---|---|
| Beta (5Y)Sensitivity to S&P 500 | 1.89x | 1.27x |
| 52-Week HighHighest price in past year | $103.00 | $336.99 |
| 52-Week LowLowest price in past year | $46.36 | $140.56 |
| % of 52W HighCurrent price vs 52-week peak | +50.4% | +43.6% |
| RSI (14)Momentum oscillator 0–100 | 45.8 | 41.7 |
| Avg Volume (50D)Average daily shares traded | 3.0M | 1.7M |
Analyst Outlook
Wall Street rates RBRK as "Buy" and ZS as "Buy". Consensus price targets imply 96.5% upside for ZS (target: $289) vs 89.1% for RBRK (target: $98).
| Metric | RBRKRubrik, Inc. | ZSZscaler, Inc. |
|---|---|---|
| Analyst RatingConsensus buy/hold/sell | Buy | Buy |
| Price TargetConsensus 12-month target | $98.25 | $288.85 |
| # AnalystsCovering analysts | 17 | 52 |
| Dividend YieldAnnual dividend ÷ price | — | — |
| Dividend StreakConsecutive years of raises | — | — |
| Dividend / ShareAnnual DPS | — | — |
| Buyback YieldShare repurchases ÷ mkt cap | 0.0% | 0.0% |
Historical Charts
Charts are rendered on first load. Hover for details.
Chart 1Total Return — 5 Years (Rebased to 100)
| Stock | Apr 24 | Feb 26 | Change |
|---|---|---|---|
| Rubrik, Inc. (RBRK) | 100 | 147.16 | +47.2% |
| Zscaler, Inc. (ZS) | 100 | 116.42 | +16.4% |
Rubrik, Inc. (RBRK) returned +40% over 5 years vs Zscaler, Inc. (ZS)'s -30%. A $10,000 investment in RBRK 5 years ago would be worth $14,043 today (including dividends reinvested).
Chart 2Revenue Growth — 10 Years
| Stock | 2016 | 2025 | Change |
|---|---|---|---|
| Rubrik, Inc. (RBRK) | $388M | $887M | +128.6% |
| Zscaler, Inc. (ZS) | $80M | $2.7B | +3227.9% |
Zscaler, Inc.'s revenue grew from $80M (2016) to $2.7B (2025) — a 47.6% CAGR.
Chart 3Net Margin Trend — 10 Years
| Stock | 2016 | 2025 | Change |
|---|---|---|---|
| Rubrik, Inc. (RBRK) | -55.0% | -130.3% | -137.0% |
| Zscaler, Inc. (ZS) | -34.2% | -1.6% | +95.5% |
Zscaler, Inc.'s net margin went from -34% (2016) to -2% (2025).
Chart 4EPS Growth — 10 Years
| Stock | 2016 | 2025 | Change |
|---|---|---|---|
| Rubrik, Inc. (RBRK) | -1.21 | -7.48 | -517.6% |
| Zscaler, Inc. (ZS) | -0.98 | -0.27 | +72.4% |
Zscaler, Inc.'s EPS grew from $-0.98 (2016) to $-0.27 (2025).
Chart 5Free Cash Flow — 5 Years
Rubrik, Inc. generated $31M FCF in 2025 (+142% vs 2021). Zscaler, Inc. generated $727M FCF in 2025 (+406% vs 2021).
RBRK vs ZS: Frequently Asked Questions
8 questions · data-driven answers · updated daily
01Is RBRK or ZS a better buy right now?
Analysts rate Rubrik, Inc. (RBRK) a "Buy" — based on 17 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.
02Which is the better long-term investment — RBRK or ZS?
Over the past 5 years, Rubrik, Inc. (RBRK) delivered a total return of +40.4%, compared to -30.1% for Zscaler, Inc. (ZS). A $10,000 investment in RBRK five years ago would be worth approximately $14K today (assuming dividends reinvested). Over 10 years, the gap is even starker: ZS returned +345.4% versus RBRK's +40.4%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.
03Which is safer — RBRK or ZS?
By beta (market sensitivity over 5 years), Zscaler, Inc. (ZS) is the lower-risk stock at 1.27β versus Rubrik, Inc.'s 1.89β — meaning RBRK is approximately 49% more volatile than ZS relative to the S&P 500.
04Which has better profit margins — RBRK or ZS?
Zscaler, Inc. (ZS) is the more profitable company, earning -1.6% net margin versus -130.3% for Rubrik, Inc. — meaning it keeps -1.6% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: ZS leads at -4.8% versus -127.9% for RBRK. At the gross margin level — before operating expenses — ZS leads at 76.9%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.
05Is RBRK or ZS more undervalued right now?
Analyst consensus price targets imply the most upside for ZS: 96.5% to $288.85.
06Which pays a better dividend — RBRK or ZS?
None of the stocks in this comparison currently pay a material dividend. All are effectively zero-yield and should be held for capital appreciation rather than income.
07Is RBRK or ZS better for a retirement portfolio?
For long-horizon retirement investors, Zscaler, Inc. (ZS) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 1.27), +345.4% 10Y return). Rubrik, Inc. (RBRK) carries a higher beta of 1.89 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (ZS: +345.4%, RBRK: +40.4%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.
08What are the main differences between RBRK and ZS?
Both stocks operate in the Technology sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both. These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.
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