CSCO vs NTCT: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of August 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.

Reading it: NTCT is the cheaper of the two on forward earnings, but cheaper is not the same as better. Pair the valuation with growth (how far the forward P/E sits below the trailing P/E) and risk (beta) before you decide.

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. CSCO and NTCT share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined CSCO and NTCT exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

Cisco Systems, founded in 1984 by Stanford University computer scientists and headquartered in San Jose, California, designs, develops, and sells technologies that power, secure, and draw insights from the internet across the Americas, Europe, the Middle East, Africa, and Asia Pacific. The company generates revenue across four main product categories: Networking (switches, routers, wireless, and increasingly AI-optimized silicon and infrastructure), Security (firewall, identity, and endpoint products plus the acquired Splunk platform for observability and threat detection), Collaboration (Webex-based unified communications and video), and Observability (application performance and IT operations monitoring). Services revenue, which includes software subscriptions and technical support, accounts for a material and growing share of the overall mix, giving the company a recurring-revenue cushion alongside its hardware cycles.

Full CSCO guide

NetScout Systems, headquartered in Westford, Massachusetts, has spent more than four decades building packet-level visibility technology for networks. Its platform is powered by deep packet inspection at carrier scale, which it markets as Smart Data: a real-time, decision-grade feed derived from actual network traffic across legacy, hybrid and cloud-native environments. Two product families sit on that foundation. Service assurance and observability offerings (nGeniusONE analytics, the ISNG appliance line, and the newer Omnis Insights, Omnis Sensor and Omnis Streamer products) help telecom operators and large enterprises find and fix service degradation. Cybersecurity offerings sold under the NetScout Arbor brand (Arbor Edge Defense, Arbor Cloud and Omnis Cybersecurity) detect and mitigate distributed denial-of-service attacks. Customers span mobile and cable operators, Fortune 500 enterprises, and federal, state and local government agencies. Revenue splits roughly 59% service and 41% product, and no single direct customer or channel partner accounted for more than 10% of revenue in any of the last three fiscal years.

Full NTCT guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• CSCO drivers: AI Networking Demand Surge; Splunk and the Security Platform Story.
• NTCT drivers: Service assurance demand and government orders; Arbor DDoS and the DigiCert asset purchase.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: Cisco's trailing P/E has expanded materially above its 3- and 5-year historical averages, meaning the stock reflects optimistic assumptions about AI-driven growth that require sustained execution to justify. For NTCT, growth is the central issue: fiscal 2027 guidance implies roughly 5% revenue expansion at the midpoint, and the five-year total return through March 2026 was about +13% against roughly +69% for the Nasdaq Composite.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick CSCO if you believe its drivers more; NTCT if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the CSCO and NTCT guides.

CSCO. Cisco's trailing P/E of roughly 40x sits meaningfully above its 3-year average of around 21-22x, reflecting the market's repricing of the stock as an AI infrastructure beneficiary rather than a mature hardware company. The forward P/E of approximately 25x suggests analysts expect earnings growth to close some of that gap, but execution on Splunk integration and security revenue recovery will be key. Gross margin compression, from approximately 65.6% to 63.6% GAAP year over year in the most recent quarter, is a metric worth tracking as product mix and memory costs evolve.

NTCT. Trailing GAAP earnings run near ~$1.62 per diluted share, putting the stock around ~24x on that basis, while the guided non-GAAP range works out to roughly ~14x forward. Stripping out ~$669 million of cash and securities against a ~$2.8 billion market value leaves an enterprise value near ~$2.1 billion, or about ~2.4x trailing revenue. Fiscal 2026 operating cash flow of ~$295 million on modest capital spending is the number that most often anchors valuation arguments here, since it dwarfs GAAP net income of ~$96 million because of heavy non-cash intangible amortization and share-based compensation.

Headline figures (approximate, 2026-06-27): CSCO shows revenue (ttm, as of april 2026) ~$60.7 billion, revenue growth (yoy, ttm) ~9%, non-gaap eps (q3 fy2026) $1.06, gaap gross margin (q3 fy2026) ~63.6%; NTCT shows revenue (ttm) ~$883M, market cap ~$2.8B (~3.1x TTM sales), q1 fy2027 revenue ~$210M (+12.7% YoY), fy2027 guidance (reaffirmed) ~$885M to ~$915M revenue.

CSCO and NTCT are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined CSCO and NTCT exposure against your real portfolio. It is not an investment adviser.