Zscaler vs. Qualys: Which Cybersecurity Stock Has the Edge?

Industry Overview - The cybersecurity market is projected to witness a compound annual growth rate (CAGR) of 12.28% from 2026 to 2031, driven by an increase in cyberattacks and the need for enhanced security measures [2]. Company Analysis: Zscaler, Inc. (ZS) - Zscaler offers a comprehensive suite of enterprise security tools, including web security, antivirus, firewalls, and vulnerability management, with a focus on automating risk detection and response [3]. - The company reported a 26% year-over-year revenue increase to $788 million in Q1 of fiscal 2026, with non-GAAP earnings rising approximately 24% to 96 cents per share [5]. - Zscaler is integrating artificial intelligence (AI) into its offerings, with AI security revenue reaching $400 million annual recurring revenue (ARR) at the end of Q1, expected to exceed $500 million in fiscal 2026 [6]. - Despite impressive growth, Zscaler's gross margin decreased to 79.9% from 80.6% year-over-year due to newer products prioritizing speed over profitability [7]. Company Analysis: Qualys, Inc. (QLYS) - Qualys is a leading provider of Vulnerability Management, Detection and Response (VMDR) solutions, experiencing increased customer penetration and product enhancements [8]. - The company reported a 10% year-over-year revenue growth to $175.3 million in Q4 of 2025, with earnings per share increasing by 16.9% to $1.87 [10]. - Qualys is expanding globally, achieving a 15% year-over-year growth in international revenue, which supports customer acquisition without significant acquisition costs [11]. - The total addressable market for Qualys is expected to reach $75 billion by 2029, growing at a CAGR of approximately 12.3%, targeting high-growth areas like cloud security and security analytics [12]. Comparative Analysis - Over the past three months, Zscaler's shares declined by 38.5%, while Qualys' shares fell by 24.3% [14]. - Zscaler trades at a forward sales multiple of 7.51, significantly higher than Qualys' 5.14, indicating a premium for Zscaler despite its tightening gross margins [14]. - The Zacks Consensus Estimate suggests that Qualys will see a 7.8% year-over-year revenue increase to $721.5 million in 2026, with earnings per share projected to rise by 3.5% to $7.32 [13]. Conclusion - While both companies are strong players in the cybersecurity sector, Qualys appears more attractive due to steadier growth and a lower valuation compared to Zscaler, which faces gross margin pressures and a higher valuation [18].