Tenable looks cheap among cybersecurity software names, trading at a lower P/E than Palo Alto Networks and CrowdStrike, a lower forward P/E than Fortinet, and one of the group's lowest PEG ratios. Its chart shows a double breakout from a triangle and range highs, with low cycles and confirming on-balance volume. x.com 

SailPoint and Tenable are the cybersecurity names worth owning, while CrowdStrike at 167x forward earnings, a 6x PEG, and Palo Alto Networks at 89x look far too expensive. SailPoint is the cleanest play on agentic identity, not cheap at 55x earnings but much cheaper than CrowdStrike and Palo Alto with faster forecast growth. Tenable trades at 17x forward earnings with EPS growing about 13%, and its net revenue retention in exposure management just rose above 106%. x.com 

Tenable looks expensive against its cash earnings at $37.76. It trades at 79x cash earnings and 72x next year's, while software companies usually get 30x. Fair value sits at $13.39 to $17.04, about 30x next year's cash earnings, so buyers pay 122% above fair. This is a valuation read only, based on reported earnings and estimates. x.com 

SentinelOne appears undervalued relative to its expected revenue growth. Analysts forecast 19.2% NTM revenue growth, versus 23.2% for CrowdStrike, which trades at a premium on forward EV/sales. x.com 

Rubrik's high switching costs and emerging AI-security demand underpin growth that looks attractively valued. At 12.9x forward EV/sales, it trades below the cybersecurity peer median relative to expected revenue growth. Subscription ARR grew 32.6% YoY and net dollar retention reached 119%. Agentic AI security adoption remains early; non-GAAP operating margin hit 7.8%, though GAAP net income remains negative partly due to stock-based compensation. x.com 

Model labs threaten cybersecurity unevenly, so vendors split by how easily AI can absorb their work. Host agents, inline enforcement and shift-right operations dealing with people, live environments and adversaries stay relatively hard to absorb for now, favoring Palo Alto Networks, CrowdStrike, Fortinet and Netskope. Shift-left, checkable work such as vulnerability scanning is already hit hardest by stronger coding agents, exposing Tenable, Qualys and Rapid7. x.com 

An open letter from OpenAI, Anthropic, Google, Microsoft and 100+ organizations urging a global surge in cyber defense is a demand signal, telling every board to make security an immediate priority. CrowdStrike, Palo Alto Networks, Zscaler, Fortinet, SentinelOne, Okta, Cloudflare, Tenable, Rubrik and Akamai are positioned to benefit most. Nine of them signed the letter, and Rubrik sells resilience for attacks that get through. Palo Alto's next-gen security ARR grew 60%, and Rubrik's revenue 46%. … Show more

Zscaler's enforcement layer looks undervalued, since AI commoditizes tools that produce answers but strengthens tools that enforce decisions. As a cloud proxy every user session must pass through, replacing it means re-architecting traffic, not swapping vendors. It trades at 8.6 times EV/sales on 25% growth, 47% below its 52-week high, with $1.11B of free cash flow and net cash. The case fails if Palo Alto, Netskope or Cisco make enforcement a checkbox in a platform bundle. x.com 

SentinelOne doesn't need to beat CrowdStrike to work, because cybersecurity is large enough for multiple winners and should keep growing as AI adds agents, cloud workloads and autonomous software that need protecting. It already has more than $1.2 billion of ARR, 20%-plus growth and improving margins. Its growth is the slowest of the group today, but if it remains a major security platform over the next decade, its current valuation leaves a lot of room. x.com 

Cybersecurity is catching a bid, with seven favored names. CrowdStrike is the category king, ARR up 24% to $5.25B; Palo Alto's platformization is real, guiding next-gen ARR up 56%; Zscaler is the zero-trust toll booth for AI agents; Cloudflare is where agent traffic terminates, with agent requests doubling monthly; Rubrik is a cyber-recovery compounder with revenue up 46%; SentinelOne is a consolidation and AI-attach story at a discount; Check Point, the cheapest, is a value reacceleration. … Show more