Top 10 Cybersecurity Companies in USA 2026

Cybercrime is no longer something that only worries the IT department. Now it shows up in your earnings.

According to IBM’s 2026 Cost of a Data Breach Report, the average data breach in the United States costs $11.5 million. That’s more than double the global average of $4.99 million. Losses reported to the FBI’s Internet Crime Complaint Center reached $20.9 billion in 2025, an increase of 26% over the year before. Attackers are using AI as well: more than one in four organizations in IBM’s research said they’d faced an AI-assisted attack.

Some cybersecurity vendors have grown into very large companies on the back of that demand. Palo Alto Networks alone made $11.48 billion in revenue in fiscal 2026. We ranked every company on one measure: revenue for its latest completed fiscal year, taken from its results release or SEC filings available as of October 27, 2026. All of these companies are publicly listed, headquartered in the US and earn most of their revenue from cybersecurity. Some may argue that Microsoft, Cisco, Google and IBM belong here. However, they don’t report cybersecurity as a stand-alone business, so we left them out. Private companies are also off the list because their financials aren’t public.

Also Read: Top 10 Cybersecurity Companies in Dubai 2026

Below, we take a closer look at the top 10 cybersecurity companies in USA for 2026: what they offer, how fast they’re growing and which buyers they suit best.

Why US Businesses Are Spending More on Cybersecurity

Demand for the top cybersecurity companies in USA keeps rising, and a few factors are driving it.

Breaches Cost More Every Year

IBM found that the average cost of a US data breach rose 11% year over year to $11.5 million. The time it takes to identify and contain a breach also went up, to 247 days. That was the first increase after five years of improvement.

Disclosure Rules Have Teeth

Since December 2023, US public companies have had to disclose a material cybersecurity incident on Form 8-K (Item 1.05) within four business days of determining that it is material. Security failures now reach investors fast, and boards are asking harder questions about how the company is protected.

AI Has Opened a New Front

According to IBM, 43% of organizations dealt with shadow AI incidents in 2026, up from 20% the previous year. Many companies now want to protect their AI agents, their browsers and the identities those agents use. You’ll see that theme in many of the acquisitions further down the list.

Fraud Is Hitting the Bottom Line

The FBI received more than one million complaints in 2025. Investment scams alone accounted for $8.6 billion in reported losses, and there were 191,561 complaints related to phishing and spoofing.

Top 10 Cybersecurity Companies in USA at a Glance

Top 10 Cybersecurity Companies in USA (2026)

Here are the top 10 cybersecurity companies in USA, ranked by most recent annual revenue.

1. Palo Alto Networks

Palo Alto Networks was founded in 2005 by Nir Zuk and is headquartered in Santa Clara, California. It started out selling next-generation firewalls and has grown into a platform that covers network security, cloud security and security operations. Revenue for fiscal 2026 (ended July 31, 2026) reached $11.48 billion, up from $9.22 billion the year before. Fourth-quarter revenue grew 34% to $3.41 billion.

The company keeps buying to widen that platform. It acquired Chronosphere for $3.35 billion in January 2026. Its takeover of identity security company CyberArk, announced at $25 billion in July 2025, was completed in February 2026. Next-Generation Security ARR reached $9.10 billion, up 63%, and remaining performance obligations stood at $21.2 billion. Palo Alto Networks, led by chairman and CEO Nikesh Arora, has guided to $14.10 billion to $14.20 billion in revenue for fiscal 2027.

Key Cybersecurity Solutions
✔ PA-Series and virtual next-generation firewalls
✔ Prisma SASE and Prisma Cloud
✔ Cortex XSIAM and Cortex XDR for security operations
✔ Unit 42 threat intelligence and incident response

Best for: Large enterprises and government agencies that want one vendor across network, cloud, identity and the SOC.

2. Fortinet

Fortinet was founded in 2000 by Ken Xie and his brother Michael Xie, and it’s headquartered in Sunnyvale, California. It sold its first FortiGate firewall in 2002, and FortiGate is still the core of the business, tied together by the Fortinet Security Fabric. Revenue grew 14% to $6.80 billion in 2025. Billings came to $7.55 billion, and the company generated $2.21 billion in free cash flow.

Fortinet says well over half a million customers use its products, and CEO Ken Xie calls it the firewall leader, with a 55% unit market share. Momentum picked up in 2026. Second-quarter revenue grew 26% to $2.05 billion and billings rose 33% to $2.37 billion. Fortinet then raised its full-year 2026 revenue guidance to between $8.02 billion and $8.18 billion. FortiSASE billings more than doubled year over year in that quarter.

Key Cybersecurity Solutions
✔ FortiGate next-generation firewalls
✔ Fortinet Security Fabric
✔ FortiSASE and unified SASE
✔ Operational technology (OT) security

Best for: Organizations of any size that want strong firewall price-performance and a single integrated security stack.

3. Gen Digital

Gen Digital took its current name in November 2022, after NortonLifeLock completed its merger with Avast. It has two headquarters, one in Tempe, Arizona, and one in Prague, Czech Republic. Revenue rose 27% to $5.0 billion in fiscal 2026 (ended April 3, 2026). That figure includes the MoneyLion brand, so not all of Gen’s revenue comes from security.

Gen is the biggest consumer-focused company on this list. It had 79 million paid customers at the end of its fiscal year, up from 68 million a year earlier, and says its products reach nearly 500 million users in more than 150 countries. Under CEO Vincent Pilette, the portfolio now runs from device security to identity and privacy protection, plus consumer finance through MoneyLion.

Key Cybersecurity Solutions
✔ Norton, Avast, AVG and Avira antivirus and device security
✔ LifeLock identity theft protection
✔ ReputationDefender privacy and online reputation services
✔ CCleaner device performance tools

Best for: Consumers, families and very small businesses that want simple, well-known protection for devices and identity.

4. CrowdStrike

CrowdStrike was founded in 2011 by George Kurtz, Dmitri Alperovitch and Gregg Marston. It moved its headquarters to Austin, Texas, in December 2021. Its Falcon platform, first launched in 2013, is built around endpoint detection and response. Revenue grew 22% to $4.81 billion in fiscal 2026 (ended January 31, 2026), and ending ARR rose 24% to $5.25 billion.

CrowdStrike has bounced back from the faulty update of July 19, 2024, which crashed about 8.5 million Windows computers. Falcon Flex accounts ended the year at $1.69 billion in ARR. In January 2026 it bought identity firm SGNL for $750 million and browser security company Seraphic Security for $420 million. In the quarter ended July 31, 2026, revenue rose 26% to $1.47 billion, ARR reached $5.84 billion and net new ARR hit a record $332.8 million.

Key Cybersecurity Solutions
✔ Falcon endpoint protection and XDR
✔ Cloud security and identity threat protection
✔ Charlotte AI security analyst
✔ Falcon Flex flexible licensing

Best for: Enterprises that want a single cloud-delivered agent for endpoint, cloud and identity, backed by threat hunting.

5. Zscaler

Zscaler was founded in 2007 by Jay Chaudhry and K. Kailash and is headquartered in San Jose, California. Its business is built on zero trust: rather than trusting anything inside the network, its cloud checks every user and every connection. Revenue grew 25% to $3.35 billion in fiscal 2026 (ended July 31, 2026), and ARR also grew 25% to $3.77 billion.

Zscaler has grown its product line through acquisitions too. Managed detection and response company Red Canary added $141 million of ARR in fiscal 2026. In February 2026 Zscaler completed its purchase of SquareX, whose browser extensions let companies apply zero trust controls in Chrome and Edge without switching to another browser. The Zero Trust Exchange runs across more than 160 data centers worldwide, and Jay Chaudhry remains chairman and CEO.

Key Cybersecurity Solutions
✔ Zero Trust Exchange platform
✔ Zscaler Internet Access secure web gateway
✔ Red Canary managed detection and response
✔ SquareX browser security

Best for: Distributed, cloud-first organizations replacing VPNs and legacy perimeter firewalls.

6. Okta

Okta was started in January 2009 by Todd McKinnon and Frederic Kerrest, who had worked together at Salesforce. Based in San Francisco, it’s the only pure identity company among the top 10 cybersecurity companies in USA. Revenue for the fiscal year ended January 31, 2026 rose 12% to $2.92 billion, and remaining performance obligations increased 15% to $4.83 billion.

By buying Auth0 for $6.5 billion in 2021, Okta built a customer identity business to pair with its workforce identity products. In September 2025 it completed the acquisition of Axiom Security to strengthen its privileged access offering. In March 2026 it released its plan for securing AI agents, with Okta for AI Agents available from April 30, 2026. The Okta Integration Network now offers more than 8,200 integrations.

Key Cybersecurity Solutions
✔ Single sign-on and multi-factor authentication
✔ Auth0 customer identity platform
✔ Okta Privileged Access
✔ Okta for AI Agents

Best for: Companies that want a vendor-neutral identity layer across thousands of apps, and now AI agents.

7. Rubrik

Rubrik was founded in January 2014 by Bipul Sinha, Arvind Jain, Soham Mazumdar and Arvind Nithrakashyap. The Palo Alto, California, company started out in backup and now brands itself as a zero trust data security firm. It began trading on the New York Stock Exchange on April 25, 2024. Revenue rose 48% to $1.32 billion in the year ended January 31, 2026, the fastest growth on this list.

Ransomware is why buyers care. Whether attackers encrypt your systems or wipe your production environment, Rubrik’s backup and recovery tools help you get your data back. Subscription ARR increased 34% to $1.46 billion, and 2,805 customers had $100,000 or more in subscription ARR at year-end, up 25%. Bipul Sinha is still CEO.

Key Cybersecurity Solutions
✔ Backup and cyber recovery
✔ Zero trust data security
✔ Data security posture management from its Laminar acquisition
✔ Business continuity planning

Best for: Organizations that want a tested plan to recover from ransomware without paying.

8. SentinelOne

SentinelOne was founded in 2013 by Tomer Weingarten, Almog Cohen and Ehud Shamir. It’s based in Mountain View, California, and has been listed on the New York Stock Exchange since June 2021. Revenue for the year ended January 31, 2026 grew 22% to $1.00 billion, crossing the billion-dollar mark for the first time, and ARR also rose 22% to $1.12 billion.

Its Singularity Platform brings endpoint, cloud and identity protection together in one place. In August 2025 SentinelOne agreed to buy Prompt Security to strengthen its AI security offering. In June 2026 it opened Purple AI Agentic Investigation to all customers, which lets the AI start an investigation on its own once a threat passes a set threshold. Customers with $100,000 or more in ARR grew 18% to 1,667.

Key Cybersecurity Solutions
✔ Singularity endpoint, cloud and identity security
✔ Purple AI agentic investigation
✔ Prompt Security protection for generative AI use
✔ Vigilance managed detection and response

Best for: Lean security teams that want heavy automation and AI-assisted investigation.

9. Tenable

Tenable was founded in September 2002 by Ron Gula, Jack Huffard and Renaud Deraison and is located in Columbia, Maryland. Deraison built the Nessus vulnerability scanner in 1998, and it’s still one of the most widely used tools of its kind. Tenable has been a public company since July 2018. Full-year 2025 revenue increased 11% to $999.4 million.

Tenable calls itself “the exposure management company,” and its AI-powered Tenable One platform sits at the center of that strategy. It bought Vulcan Cyber for $150 million in January 2025 and Apex Security for $105 million in May 2025. Steve Vintz and Mark Thurmond have led the company as co-CEOs since December 2024, when the late Amit Yoran stepped back.

Key Cybersecurity Solutions
✔ Nessus vulnerability assessment
✔ Tenable One exposure management platform
✔ Vulcan Cyber exposure risk management
✔ AI security from the Apex acquisition

Best for: Security teams that need to find, rank and fix weaknesses before attackers exploit them.

10. Rapid7

Rapid7 has been around since 2000 and is headquartered in Boston. It sells detection and response, vulnerability management and managed services, and its products include the Metasploit penetration testing framework. Full-year 2025 revenue rose 2% to $859.8 million, while ARR stayed flat at $840 million across more than 11,500 customers.

Slow growth brought change at the top. On June 1, 2026, Rapid7 named former Forescout CEO Wael Mohamed as its new chief executive, and Corey Thomas, CEO for 13 years, moved to executive chair. In March 2026 the company also bought Kenzo Security for $25.5 million. Its blend of software and managed detection and response suits mid-sized companies that want round-the-clock coverage.

Key Cybersecurity Solutions
✔ InsightIDR SIEM and XDR
✔ InsightVM vulnerability management
✔ Managed detection and response (MDR)
✔ Metasploit penetration testing

Best for: Mid-market organizations that want detection, vulnerability management and a managed SOC from one provider.

How to Choose the Right Cybersecurity Partner in USA

Start With Your Biggest Risk

A hospital worried about ransomware and a bank worried about identity fraud need different tools. Work out which threats concern you most, pick your top three, and then look for vendors that lead in those categories instead of defaulting to the biggest brand.

Decide Between a Platform and Best-of-Breed

Palo Alto Networks, Fortinet and CrowdStrike all want to be the only platform you need, which cuts the number of consoles and contracts. Specialists such as Okta, Rubrik and Tenable go deeper in one area. Plenty of large US companies run several of these vendors at once, so check how each one fits your current architecture.

Check Disclosure and Compliance Support

As a public company, you have four business days after deciding an incident is material to file a Form 8-K under Item 1.05. Ask each vendor what logs, forensics and incident response support it can provide to help you reach that decision quickly and document it.

Test the AI Claims

Almost every vendor has added AI features. Insist on a proof of concept with your own data, measure how many alerts it closes without human help, and make sure every action the AI takes leaves an audit trail.

Look at Financial Strength and Momentum

Pick a security partner you believe will be around for the long haul. Revenue growth, ARR trends and leadership changes are all public for the companies above, and they show whether a vendor can keep investing in its products.

Frequently Asked Questions About Cybersecurity Companies in USA

Which is the largest cybersecurity company in the USA?

Among US-headquartered companies that focus mainly on security, Palo Alto Networks is the largest by revenue, at $11.48 billion for the fiscal year ended July 31, 2026. Microsoft and Cisco also earn significant revenue from security, but they aren’t dedicated cybersecurity companies.

Why aren’t Microsoft, Cisco or IBM ranked?

This list covers companies whose main business is cybersecurity, ranked by reported annual revenue. Diversified technology groups don’t break out security as a separate, comparable figure, so we left them out. They’re still strong choices, especially if you already rely on their ecosystems.

What is the best cybersecurity company for a small business?

There’s no single best choice for everyone; it depends on the size of your organization. A very small firm might start with a consumer suite such as Norton and work its way up. Growing companies often look at a Fortinet firewall, a managed detection and response service such as Rapid7’s, or an endpoint platform from CrowdStrike or SentinelOne.

How much does a data breach cost a US company?

According to IBM’s 2026 Cost of a Data Breach Report, the average US breach cost $11.5 million, 11% higher than the year before and more than double the global average.

Conclusion

The top 10 cybersecurity companies in USA for 2026 range from platform giants to focused specialists. Palo Alto Networks, Fortinet and CrowdStrike are racing to be the one platform a CISO needs, while Okta, Rubrik and Tenable win by going deep in identity, recovery and exposure management.

When you choose your next cybersecurity partner, weigh your threat profile, your current technology stack and your budget. Use the revenue figures and recent moves above as a starting point, and insist on a proof of concept before you sign.

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