A cybersecurity company develops software, hardware or services that protect networks, devices, identities, applications and data from unauthorised access and attack. The industry spans network firewalls, endpoint protection, identity and access management, cloud security, vulnerability management, data security and consumer antivirus.
This list ranks the 20 largest publicly listed companies whose business is principally cybersecurity, ordered by total revenue for their most recently completed fiscal year as reported in their own results releases. The largest, Palo Alto Networks, reported US$11.48 billion for the year to July 2026; the smallest entry, OneSpan, reported US$243.2 million for 2025.
Contents
- Fiscal years and comparability
- Methodology
- The list
- Comparison table
- Frequently asked questions
- See also
Fiscal years and comparability
Companies in the sector use different fiscal calendars. Palo Alto Networks and Zscaler close their years on 31 July; CrowdStrike, Okta, SentinelOne, SailPoint, Rubrik and Netskope on 31 January; Gen Digital in early April; and most others on 31 December. The figures below therefore cover periods ending between December 2025 and July 2026, and growth rates reflect different market conditions. Revenue is the reported total under each company's accounting standards and includes non-security lines where a company has them.
Methodology
Entries were limited to companies listed on a public stock exchange that derive most of their revenue from cybersecurity products or services, and were ordered strictly by total revenue for their most recent completed fiscal year, taken from each company's earnings release or the copy filed with the US Securities and Exchange Commission. Trend Micro reports in yen; it was placed using the company's own ¥154.22 per dollar rate, and its position would not change at any rate between ¥102 and ¥209.
Diversified groups with large security units, such as Cisco, Microsoft, Akamai, Cloudflare and F5, were excluded because their reported revenue is mostly from other businesses. Privately held vendors such as Proofpoint, which is backed by Thoma Bravo, were excluded because they do not publish audited revenue. CyberArk does not appear because Palo Alto Networks acquired it during fiscal 2026. Borderline inclusions (Rubrik, Cellebrite, A10 Networks and OneSpan) are flagged in their entries.
The list
1
PA
Network, cloud and security-operations platform vendor; largest pure-play by revenue
Best for: Enterprises consolidating network, cloud and SOC tooling with one vendor
Palo Alto Networks reported total revenue of US$11.48 billion for fiscal 2026, the year ended 31 July 2026, up from US$9.22 billion in fiscal 2025. The company describes its portfolio as spanning network security, cloud security, security operations, AI security and identity, and states that it serves more than 70,000 customers, supported by its Unit 42 threat-intelligence group. During the fiscal year it completed the acquisition of CyberArk, the identity-security vendor, and it reported CyberArk integration costs in its fiscal 2026 results; it also acquired Console, an AI agent-workflow company, for its Cortex platform. For fiscal 2027 the company guided to revenue of US$14.10–14.20 billion.
- Revenue (FY2026)
- US$11,480 million [1]
- Prior year (FY2025)
- US$9,221 million
- Fiscal year end
- 31 July 2026
- Listing
- Nasdaq: PANW
2
Network security vendor focused on converging networking and security
Best for: Organisations wanting firewall, SD-WAN and SASE from a single supplier
Fortinet reported 2025 revenue of US$6,799.6 million, up 14% from US$5,955.8 million in 2024. Product revenue grew 16% to US$2.22 billion and billings rose 16% to US$7.55 billion. The company positions itself around the convergence of networking and security, offering what it describes as an integrated portfolio of more than 50 enterprise products, and states that well over half a million customers use its products. Its fastest-growing lines in 2025 were unified SASE and security-operations products, whose combined billings grew 24%. Product revenue accounted for about a third of the total, with services making up the rest.
- Revenue (FY2025)
- US$6,799.6 million [2]
- Prior year (FY2024)
- US$5,955.8 million
- Fiscal year end
- 31 December 2025
- Listing
- Nasdaq: FTNT
3
Consumer cyber-safety group behind Norton, Avast and LifeLock
Best for: Consumer antivirus, identity-theft protection and privacy tools
Gen Digital is the largest consumer-focused company on this list. It reported fiscal 2026 revenue of US$5,000 million for the year ended 3 April 2026, up 27% from US$3,935 million, and stated that this was the first year its revenue exceeded US$5 billion. Its brands include Norton, Avast, LifeLock and MoneyLion, and the company also operates in financial wellness, so not all Gen revenue is security revenue. The company reported 79 million paid customers at fiscal year end, up from 68 million, and says it reaches nearly 500 million users in more than 150 countries. Net cash paid for acquisitions was US$1,032 million in fiscal 2026.
- Revenue (FY2026)
- US$5,000 million [3]
- Prior year (FY2025)
- US$3,935 million
- Fiscal year end
- 3 April 2026
- Listing
- Nasdaq: GEN
- Paid customers
- 79 million (April 2026)
4
Cloud-native endpoint, identity and cloud-workload protection (Falcon)
Best for: Endpoint detection and response and managed threat hunting
CrowdStrike reported fiscal 2026 revenue of US$4,812.0 million for the year ended 31 January 2026, up 22% from US$3,953.6 million, of which subscription revenue was US$4.56 billion. Ending annual recurring revenue (ARR) reached US$5.25 billion, and net new ARR exceeded US$1 billion for the first time. The company's Falcon platform covers endpoints, cloud workloads, identity and data using a single lightweight agent and cloud-based analytics. ARR from customers on Falcon Flex, its consumption-style licensing model, reached US$1.69 billion. CrowdStrike also reported positive GAAP net income in the fourth quarter.
- Revenue (FY2026)
- US$4,812.0 million [4]
- Prior year (FY2025)
- US$3,953.6 million
- Fiscal year end
- 31 January 2026
- Listing
- Nasdaq: CRWD
- Ending ARR
- US$5.25 billion
5
Cloud-delivered zero-trust and secure web gateway platform
Best for: Replacing VPNs and on-premises web proxies with a cloud service
Zscaler reported fiscal 2026 revenue of US$3,352.5 million for the year ended 31 July 2026, up 25% from US$2,673.1 million. Excluding Red Canary, the managed detection and response firm it acquired, revenue was about US$3,209 million, up 20%. ARR reached US$3,771 million, including US$141 million contributed by Red Canary. The company's Zero Trust Exchange routes user and workload traffic through its own cloud for inspection, an approach it describes as the world's largest in-line cloud security platform. For fiscal 2027 Zscaler guided to revenue of US$3.908–3.938 billion, implying slower growth than in fiscal 2026.
- Revenue (FY2026)
- US$3,352.5 million [5]
- Prior year (FY2025)
- US$2,673.1 million
- Fiscal year end
- 31 July 2026
- Listing
- Nasdaq: ZS
- ARR
- US$3,771 million
6
O
Independent workforce and customer identity platform
Best for: Single sign-on and identity management independent of a cloud provider
Okta reported fiscal 2026 revenue of US$2,919 million for the year ended 31 January 2026, up 12% from US$2,610 million; subscription revenue made up US$2,855 million. Remaining performance obligations, its subscription backlog, stood at US$4.827 billion, up 15%. The company provides authentication and authorisation services through workforce and customer-identity products, and now markets protection for AI agents and machine identities alongside human users. Okta recorded GAAP operating income for the year, and its fiscal 2027 guidance of US$3.170–3.190 billion implies growth of about 9%, the slowest among the identity vendors listed here.
- Revenue (FY2026)
- US$2,919 million [6]
- Prior year (FY2025)
- US$2,610 million
- Fiscal year end
- 31 January 2026
- Listing
- Nasdaq: OKTA
7
Long-established firewall vendor with the Infinity platform
Best for: Established enterprises standardised on Check Point firewalls
Check Point reported 2025 total revenue of US$2,725 million, an increase of 6%, with security subscription revenue up 10% to US$1,219 million and calculated billings of US$2,906 million. The company sells network, cloud and workspace security through its Infinity platform and states that it protects more than 100,000 organisations. It is notable for high profitability: GAAP earnings per diluted share were US$9.62 in 2025, although the release notes that roughly US$1.90 of that came from tax-related benefits. The company repurchased about 6.8 million shares for roughly US$1.4 billion during the year.
- Revenue (FY2025)
- US$2,725 million [7]
- Fiscal year end
- 31 December 2025
- Listing
- Nasdaq: CHKP
- Organisations protected
- 100,000+ (company figure)
8
TM
Tokyo-listed enterprise and consumer security vendor
Best for: Enterprises seeking a non-US vendor for endpoint and cloud security
Trend Micro reported consolidated net sales of about ¥276 billion for 2025, up 1%, with operating income of about ¥58 billion, which it described as its highest full-year figure. At the ¥154.22 per US dollar rate the company used for its fourth-quarter figures, net sales equal roughly US$1.79 billion (conversion by this list, not by the company). Trend Micro describes itself as the largest cybersecurity company headquartered outside the United States and says it protects more than 500,000 enterprises. Consumer sales fell 9% in 2025, which the company attributed to the after-effects of earlier payment-processing problems, while enterprise ARR exceeded US$1.3 billion.
- Revenue (FY2025)
- ≈ ¥276 billion [8]
- Fiscal year end
- 31 December 2025
- Listing
- Tokyo Stock Exchange: 4704
- Total ARR
- US$1.7 billion
9
Data security and cyber-recovery platform
Best for: Ransomware recovery and data-security posture management
Rubrik reported fiscal 2026 revenue of US$1,316.2 million for the year ended 31 January 2026, up 48% from US$886.5 million, the fastest growth among the companies on this list. Subscription ARR reached US$1.46 billion, and 2,805 customers each paid US$100,000 or more in subscription ARR. The company presents itself as a security company: Rubrik Security Cloud secures, monitors and recovers data, identities and workloads, so that organisations can restore systems after ransomware attacks. Fourth-quarter revenue included US$18.0 million from material rights, a one-off accounting item.
- Revenue (FY2026)
- US$1,316.2 million [9]
- Prior year (FY2025)
- US$886.5 million
- Fiscal year end
- 31 January 2026
- Listing
- NYSE: RBRK
- Subscription ARR
- US$1.46 billion
10
Identity governance and administration specialist
Best for: Access governance and certification in large regulated enterprises
SailPoint reported fiscal 2026 revenue of US$1,071.4 million for the year ended 31 January 2026, up 24% from US$861.6 million, with subscription revenue of US$1.010 billion. Total ARR grew 28% to US$1.125 billion, of which SaaS ARR was US$746 million, up 38%. The company focuses on identity governance: deciding which human and machine identities may access which applications and data, and certifying that access over time. It reported a GAAP operating loss of US$307 million for fiscal 2026, so its scale has not yet translated into GAAP profitability.
- Revenue (FY2026)
- US$1,071.4 million [10]
- Prior year (FY2025)
- US$861.6 million
- Fiscal year end
- 31 January 2026
- Listing
- Nasdaq: SAIL
- ARR
- US$1.125 billion
11
AI-based endpoint and extended detection platform (Singularity)
Best for: Autonomous endpoint protection as an alternative to CrowdStrike
SentinelOne reported fiscal 2026 revenue of US$1,001.3 million for the year ended 31 January 2026, up 22% from US$821.5 million, crossing US$1 billion for the first time. ARR reached US$1,119.1 million, and the number of customers with ARR of US$100,000 or more grew 18% to 1,667. Its Singularity platform competes most directly with CrowdStrike in endpoint and extended detection and response. The company reported its first full year of non-GAAP operating profitability, with a 3% non-GAAP operating margin, while its GAAP operating margin remained negative at minus 32%. Its revenue edges out Tenable's by under US$2 million.
- Revenue (FY2026)
- US$1,001.3 million [11]
- Prior year (FY2025)
- US$821.5 million
- Fiscal year end
- 31 January 2026
- Listing
- NYSE: S
- ARR
- US$1,119.1 million
12
Vulnerability and exposure management vendor
Best for: Vulnerability scanning and exposure management across IT and OT
Tenable reported 2025 revenue of US$999.4 million, up 11% from US$900.0 million, and full-year calculated current billings of US$1.049 billion. The company, based in Columbia, Maryland, built its business on vulnerability scanning and now markets an exposure-management platform that covers IT infrastructure, cloud environments and operational technology. It states that it serves more than 40,000 customers. Tenable generated US$266.8 million of operating cash flow in 2025 and added US$150 million to its share-repurchase authorisation. Its 2026 revenue guidance of US$1.065–1.075 billion would take it past US$1 billion in annual revenue.
- Revenue (FY2025)
- US$999.4 million [12]
- Prior year (FY2024)
- US$900.0 million
- Fiscal year end
- 31 December 2025
- Listing
- Nasdaq: TENB
- Customers
- 40,000+ (company figure)
13
Managed detection and response and security-operations platform
Best for: Mid-market organisations outsourcing detection and response
Rapid7 reported 2025 revenue of US$859.8 million, up about 2% from US$844.0 million, with ARR flat at US$840 million. The Boston-based company is known for managed detection and response services alongside vulnerability management and its security-operations platform, and reports more than 11,500 customers. Rapid7 was profitable on a GAAP basis in 2025, with net income of US$23.4 million and free cash flow of US$130.1 million. Growth has nonetheless stalled: the company guided to 2026 revenue of US$835–843 million, a slight decline, the only decline among the companies here that published annual guidance.
- Revenue (FY2025)
- US$859.8 million [13]
- Prior year (FY2024)
- US$844.0 million
- Fiscal year end
- 31 December 2025
- Listing
- Nasdaq: RPD
- ARR
- US$840 million
14
N
Security service edge and cloud-access security vendor
Best for: Data-centric SASE and SaaS application control
Netskope reported fiscal 2026 revenue of US$709.0 million for the year ended 31 January 2026, up 32% from US$538.3 million. ARR grew 31% to US$811 million, and the company recorded its first full year of positive free cash flow. Its Netskope One platform and NewEdge network provide access control and real-time security for web, SaaS, cloud, AI and private applications, and the company says more than 30 of the Fortune 100 are customers. It remains loss-making, with a GAAP operating loss of US$652.6 million for the year.
- Revenue (FY2026)
- US$709.0 million [14]
- Prior year (FY2025)
- US$538.3 million
- Fiscal year end
- 31 January 2026
- Listing
- Nasdaq: NTSK
- ARR
- US$811 million
15
Q
Cloud-based vulnerability, compliance and IT asset management
Best for: Agent-based vulnerability and compliance scanning at scale
Qualys reported 2025 revenue of US$669.1 million, up 10% from US$607.6 million. Founded in 1999 as one of the first SaaS security companies, it sells its Enterprise TruRisk Platform, which uses a single agent for vulnerability detection, compliance and IT asset inventory. The company reports more than 10,000 subscription customers, including a majority of the Forbes Global 100 and Fortune 100. Qualys is among the most profitable mid-sized vendors: fourth-quarter GAAP net income was US$53.2 million on revenue of US$175.3 million. It guided to 2026 revenue of US$717–725 million.
- Revenue (FY2025)
- US$669.1 million [15]
- Prior year (FY2024)
- US$607.6 million
- Fiscal year end
- 31 December 2025
- Founded
- 1999
- Listing
- Nasdaq: QLYS
16
V
Data security platform; agreed to be acquired by Proofpoint
Best for: Data classification, access governance and data detection
Varonis reported 2025 revenue of US$623.5 million, up 13% from US$551.0 million. The year was dominated by its transition from term licences to SaaS: SaaS revenue rose to US$462.6 million from US$208.8 million, while term-licence revenue fell as customers converted. Total ARR reached US$745.4 million. Its platform discovers and classifies sensitive data, removes exposures and detects threats across SaaS, cloud and on-premises data stores. In 2026 Proofpoint, a Thoma Bravo-backed company, agreed to acquire Varonis for US$49.75 per share in cash, about US$6.3 billion, with closing expected in the first half of 2027.
- Revenue (FY2025)
- US$623.5 million [16]
- Prior year (FY2024)
- US$551.0 million
- Fiscal year end
- 31 December 2025
- Listing
- Nasdaq: VRNS (pending acquisition)
17
Digital forensics and investigative software
Best for: Mobile-device forensics for investigators
Cellebrite reported 2025 revenue of US$475.7 million, up 19% from US$401.2 million, with total ARR of US$480.8 million. Its software makes data from digital devices usable as forensically sound evidence in investigations, and the company says more than 7,000 law-enforcement, defence, intelligence and enterprise organisations use it. It acquired Corellium on 1 December 2025, adding US$16.1 million of ARR. Cellebrite sits at the edge of the cybersecurity category: it serves digital forensics and investigations rather than network or endpoint defence. Excluding Corellium, ARR grew organically by 17% to US$464.7 million.
- Revenue (FY2025)
- US$475.7 million [17]
- Prior year (FY2024)
- US$401.2 million
- Fiscal year end
- 31 December 2025
- Listing
- Nasdaq: CLBT
18
DDoS, web application and API protection vendor
Best for: DDoS mitigation for carriers and large web properties
Radware reported record 2025 revenue of US$301.9 million, up 10% from US$274.9 million. The company sells application security and delivery products, including DDoS mitigation, web application firewalls, API protection and bot management, to enterprises and telecommunications carriers. Its cloud ARR grew 23% to US$95.2 million and total ARR reached US$251.0 million at year end. By region, the Americas contributed US$124.5 million of 2025 revenue. GAAP net income rose to US$20.3 million from US$6.0 million in 2024, and non-GAAP diluted earnings per share were US$1.15, compared with US$0.87.
- Revenue (FY2025)
- US$301.9 million [18]
- Prior year (FY2024)
- US$274.9 million
- Fiscal year end
- 31 December 2025
- Listing
- Nasdaq: RDWR
19
AN
Secure application delivery and DDoS protection
Best for: Service providers needing combined traffic management and DDoS defence
A10 Networks reported record 2025 revenue of US$290.6 million, up 11% from US$261.7 million. Founded in 2004 and headquartered in San Jose, California, the company sells secure application and network products to large enterprises, service providers and cloud platforms, and states that it has more than 7,000 customers. A10 reported GAAP net income of US$42.1 million and adjusted EBITDA of US$86.0 million, a margin of 29.6%. Because its portfolio combines application delivery and performance with security, it is a borderline pure-play. The company returned US$86.3 million to investors in 2025, including US$68.9 million of share repurchases.
- Revenue (FY2025)
- US$290.6 million [19]
- Prior year (FY2024)
- US$261.7 million
- Fiscal year end
- 31 December 2025
- Founded
- 2004
- Headquarters
- San Jose, California, US
- Listing
- NYSE: ATEN
20
O
Authentication, mobile-app protection and e-signature vendor
Best for: Strong authentication and mobile-app protection
OneSpan reported 2025 revenue of US$243.2 million, unchanged from 2024. It reports two segments: Cybersecurity, which fell 2% to US$177.7 million, and Digital Agreements (e-signature and identity verification), which grew 7% to US$65.5 million. The cybersecurity portfolio covers high-assurance authentication, mobile app protection and fraud prevention. Subscription revenue grew 12% to US$156.1 million and ARR rose 11% to US$186.9 million. Results include Nok Nok Labs, a passwordless-authentication firm acquired in June 2025. Operating income grew 8% to US$48.4 million, and net retention rate was 104%.
- Revenue (FY2025)
- US$243.2 million [20]
- Fiscal year end
- 31 December 2025
- Listing
- Nasdaq: OSPN
- Cybersecurity segment revenue
- US$177.7 million
Frequently asked questions
What is the largest cybersecurity company by revenue?
Among publicly listed companies focused on security, Palo Alto Networks is the largest, with revenue of US$11.48 billion for the fiscal year ended 31 July 2026. Fortinet was second with US$6.80 billion for calendar 2025. Diversified technology groups such as Microsoft and Cisco also sell large security portfolios but are not included here.
Is CrowdStrike bigger than Palo Alto Networks?
No. By revenue, CrowdStrike reported US$4.81 billion for its fiscal year ended January 2026, less than half of Palo Alto Networks' US$11.48 billion for the year ended July 2026. CrowdStrike is larger than Zscaler, Okta and Check Point on the same basis, and its ending ARR was US$5.25 billion.
Which cybersecurity companies are growing fastest?
Among the companies listed, Rubrik reported the fastest revenue growth at 48% for fiscal 2026, followed by Netskope at 32%, and Gen Digital (27%) and Palo Alto Networks (25%), both of which made large acquisitions during the year. Rapid7 grew about 2% and OneSpan was flat.
Why is CyberArk not on the list?
CyberArk, the identity-security vendor, was acquired by Palo Alto Networks during Palo Alto's fiscal 2026. Its revenue is now reported within Palo Alto Networks' results, so it no longer has separate annual figures and cannot be ranked as an independent company.
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