# What Are Cybersecurity Stocks? > Understand cybersecurity stocks, the businesses included in this curated comparison, and how network, identity, endpoint, and data security differ. Source: MarketCapLens — https://www.marketcaplens.com/learn/what-are-cybersecurity-stocks Updated: 2026-11-11 **Cybersecurity stocks**, on MarketCapLens, are U.S.-listed vendors focused on protecting networks, devices, identities, and data. The [live cybersecurity stocks comparison](https://www.marketcaplens.com/cybersecurity-stocks) ranks the selected companies by market capitalization and shows their available price and market-cap histories. Security products protect different parts of an organization. A firewall controls network traffic; endpoint software protects devices; identity systems decide who can sign in; recovery software helps restore data after an incident. Those jobs overlap, but the products and buyers are not interchangeable. ## Which companies qualify? We select U.S.-listed companies whose core offerings are cybersecurity products or services, including network and endpoint protection, identity management, exposure management, and data resilience. This is a focused research comparison, not every software company with a security product and not an ETF portfolio. Only members present in the site’s current ranking appear. Market cap values the whole company. The business roles on the live page explain why each member belongs: - **Network & cloud security:** [Palo Alto Networks (PANW)](https://www.marketcaplens.com/company/PANW), [Fortinet (FTNT)](https://www.marketcaplens.com/company/FTNT), [Zscaler (ZS)](https://www.marketcaplens.com/company/ZS). - **Endpoint protection:** [CrowdStrike (CRWD)](https://www.marketcaplens.com/company/CRWD). - **Identity & access:** [Okta (OKTA)](https://www.marketcaplens.com/company/OKTA). - **Exposure & data resilience:** [Qualys (QLYS)](https://www.marketcaplens.com/company/QLYS), [Tenable (TENB)](https://www.marketcaplens.com/company/TENB), [Rubrik (RBRK)](https://www.marketcaplens.com/company/RBRK). This is a selected comparison, not an exhaustive worldwide industry directory. The [ranking eligibility rules](https://www.marketcaplens.com/learn/how-the-ranking-works) determine which listed companies appear in the current figures. A company can belong to a Featured list and also appear in its broader [Technology sector ranking](https://www.marketcaplens.com/sectors/technology). The two views answer different questions. ## What drives these businesses? Four product roles explain the comparison. Network tools filter traffic; endpoint tools protect individual computers and servers; identity tools control access; recovery tools restore data after an incident. One company may sell several of these, so a role label is a starting point rather than an exclusive category. Subscription contracts also produce different measures. In an illustrative one-year service costing $1,200, a customer might pay the full amount up front while the vendor recognizes $100 of revenue each month as it provides the service. A booking describes a customer commitment under the company’s own definition; a bill is an invoice; cash collected and revenue earned can arrive at different times. Compare those definitions before comparing growth rates. Retention, operating costs, and stock-based pay also affect how revenue translates into cash and value per share. ## What can the ranking leave out? A security incident can affect customers, reputation, legal costs, and renewals. Competition also comes from large software platforms that bundle security with other products. Compare reliability, margins, and customer concentration alongside growth. The largest company is not necessarily the cheapest or the most profitable. The [difference between market cap and share price](https://www.marketcaplens.com/learn/market-cap-vs-stock-price) matters here: a low dollar price per share says little about the value of the whole business. ## How to read the figures and charts Market cap measures the whole company’s equity value. The list’s combined cap adds the current values of members present in the ranking; each company’s weight is its cap divided by that total. The historical stack includes companies when usable history begins, so new listings and share-count changes can move the total as well as prices. It is not the return on a fixed portfolio. Price-performance lines use a common starting date and exclude dividends. A 100% increase doubles the starting price; a 200% increase triples it. The live comparison states its dates, included names, and exclusions. Missing history is not a zero return. See [price return versus total return](https://www.marketcaplens.com/learn/price-return-vs-total-return) for what income changes. The main performance comparison uses companies with a full five-year price history. A newer listing can remain in the current table even when it cannot appear in that chart. Five-year return columns still require the full period. Documented predecessor-company history is excluded where it would misrepresent the current listed business. ## Related comparisons For adjacent businesses, compare [AI supply-chain stocks](https://www.marketcaplens.com/ai-stocks), [defense stocks](https://www.marketcaplens.com/defense-stocks), and [power grid stocks](https://www.marketcaplens.com/power-grid-stocks). A company can qualify for more than one list, so adding their combined market caps would count overlapping companies more than once. The [Featured directory](https://www.marketcaplens.com/featured) explains each list’s scope and links to its live comparison and guide. For general education only. Nothing here is investment advice. ## Frequently asked questions ### What are cybersecurity stocks? U.S.-listed vendors focused on protecting networks, devices, identities, and data. ### Does this list include every company selling security software? No. It is a focused selection of security vendors. Diversified cloud and software companies may sell security tools without belonging to this list. ### Why can a cybersecurity stock have no five-year return? A recent listing or a gap in available history can leave a long-term return blank. Current market cap can still be shown, and chart exclusions are explained beside the comparison. ## Sources - [CrowdStrike: endpoint protection and related security roles](https://www.crowdstrike.com/en-us/cybersecurity-101/endpoint-security/) - [Rubrik: public-listing date](https://ir.rubrik.com/news-events/press-releases/news-details/2024/Rubrik-Announces-Pricing-of-Upsized-Initial-Public-Offering/default.aspx) - [Global X: cybersecurity business scope and reference universe](https://www.globalxetfs.com/funds/bug) References explain the concepts; MarketCapLens supplies the examples and calculator assumptions. See https://www.marketcaplens.com/about for who checks the numbers. ## Related guides - [AI stocks](https://www.marketcaplens.com/learn/what-are-ai-stocks) - [What are defense stocks?](https://www.marketcaplens.com/learn/what-are-defense-stocks)