Palo Alto vs. Zscaler: Which Cybersecurity Stock Looks Stronger After Earnings?

Palo Alto Networks and Zscaler both beat expectations, but both stocks slipped as investors weighed high expectations and forward guidance.

Palo Alto's next-generation security ARR growth and free-cash-flow margin give it an edge over Zscaler in this comparison.

Zscaler remains a strong cybersecurity operator, but its slower ARR growth and lower free cash flow margin make Palo Alto look better positioned today.

The AI boom has been a gift to the cybersecurity industry, driving a wave of spending as companies scramble to defend against a new generation of threats. Two of the biggest beneficiaries, Palo Alto Networks Inc. (NASDAQ: PANW) and Zscaler Inc. (NASDAQ: ZS), both reported earnings this week, offering a rare chance to weigh the sector's heavyweights side by side.

Curiously, both comfortably beat revenue and earnings expectations, yet both shares slipped afterward. Palo Alto had already rallied sharply from its February low heading into its report. Still, even a solid beat couldn't stop the stock from falling sharply, a classic case of lofty expectations proving too hard to satisfy. Zscaler, earlier in its own recovery after a punishing slide, edged lower too, with the beat obviously not being convincing enough.

So with both companies riding the same powerful tailwind and both leaving the market slightly underwhelmed this week, it's a good time to explore which one enters the final few months of the year in the stronger position.

2 AI Security Winners Take Different Paths

Although they compete for the same security budgets, the two are known for very different things. Palo Alto has made its name as the great consolidator, with a strategy it calls platformization: persuading customers to buy a whole suite of security products from it as a single vendor rather than stitching together tools from many.

Zscaler, by contrast, made its name pioneering zero trust, a cloud-based security model that assumes no user or device should be trusted by default. While the approach is now industry-wide, Zscaler remains its standard-bearer and has built a formidable cloud security franchise around it.

Both models are benefiting handsomely from the AI wave, and both used their results this week to speak to surging demand for AI-related security. However, the big difference lies in each one's underlying momentum, and here the numbers begin to separate them.