Chicago, IllinoisHuman vetted since 2007
Best Cybersecurity & Digital Defense Serving Chicago
Neither Chicago nor Illinois has enough local cybersecurity firms to fill a ranked list yet. Below are 12 nationwide cybersecurity firms that serve Chicago clients remotely.
- Verified providers
- 12 verified / 12 listed
- Last updated
- Last updated August 2026
Showing nationwide cybersecurity firms — no local providers indexed yet.
Ranked listings
Top Cybersecurity & Digital Defense serving Chicago, IL
Ranked by tier and rating. Every listing is human vetted before it appears here.
How we rank
Providers are hand-vetted by our editorial team based on verified client history, domain authority, and AI footprint. Rankings within Chicago are then ordered by tier, verification status, rating, and review count — never by pay-to-rank.
#1CR
Cybersecurity & Digital DefenseVerified
CrowdStrike
CrowdStrike, a software company, provides next-generation endpoint protection, threat intelligence, and incident response services from Irvine, United States.
Irvine, California
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#2LO
Cybersecurity & Digital DefenseVerified
Locklizard
Locklizard provides document security solutions using advanced encryption to protect sensitive intellectual property.
England, United Kingdom
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#3TR
Cybersecurity & Digital DefenseVerified
TriCerat Inc.
TriCerat Inc., Software Company, provides desktop security and OS-level application access control solutions for IT firms globally.
Baltimore, Maryland
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#4FR
Cybersecurity & Digital DefenseVerified
Free Trojan Remover
Free Trojan Remover provides information on trojan horse infections and PC security software for removal.
India
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#5
Cybersecurity & Digital DefenseVerified
SentinelOne
SentinelOne is an AI-native cybersecurity company founded in 2013 by Tomer Weingarten and Almog Cohen, headquartered in Mountain View, California. The company provides the Singularity Platform for autonomous endpoint protection, cloud workload security, and identity threat detection powered by AI models that detect and respond to threats without human intervention. SentinelOne serves over 12,000 customers and reported $621 million in revenue for fiscal year 2025. The company trades on NYSE under the ticker S.
Mountain View, CaliforniaFounded 2013
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#6
Cybersecurity & Digital DefenseVerified
Fortinet
Fortinet is a multinational cybersecurity company founded in 2000 by brothers Ken Xie and Michael Xie, headquartered in Sunnyvale, California. Fortinet develops the FortiGate next-generation firewall (the most deployed network firewall globally), FortiSASE, FortiEDR, and the Fortinet Security Fabric integrating over 50 security products. The company serves over 755,000 customers worldwide and reported $5.9 billion in revenue for fiscal year 2024. Fortinet trades on NASDAQ under the ticker FTNT.
Sunnyvale, CaliforniaFounded 2000
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#7
Cybersecurity & Digital DefenseVerified
Palo Alto Networks
Palo Alto Networks is the world's largest cybersecurity company by market capitalisation, founded in 2005 by Nir Zuk and headquartered in Santa Clara, California. The company provides next-generation firewalls, cloud security (Prisma Cloud), SOC automation (Cortex XSIAM), and zero trust network access. Palo Alto Networks serves over 80,000 customers including 85 of the Fortune 100 and reported $8.6 billion in revenue for fiscal year 2025. The company trades on NASDAQ under the ticker PANW.
Santa Clara, CaliforniaFounded 2005
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#8
Cybersecurity & Digital DefenseVerified
Zscaler
Zscaler is a cloud security company founded in 2007 by Jay Chaudhry, headquartered in San Jose, California. Zscaler operates the Zero Trust Exchange, the world's largest inline security cloud processing over 500 billion transactions daily across 150+ data centres. Products include Zscaler Internet Access (ZIA), Zscaler Private Access (ZPA), and Zscaler Digital Experience (ZDX). The company serves over 8,100 customers including 40% of the Fortune 500 and reported $2.2 billion in revenue for fiscal year 2025. Zscaler trades on NASDAQ under the ticker ZS.
San Jose, CaliforniaFounded 2007
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#9
Cybersecurity & Digital DefenseVerified
Okta
Okta is the leading independent identity and access management company, founded in 2009 by Todd McKinnon and Frederic Kerrest, headquartered in San Francisco, California. Okta provides cloud-based identity solutions including Single Sign-On (SSO), Multi-Factor Authentication (MFA), lifecycle management, and API access management through the Okta Identity Cloud. The company acquired Auth0 in 2021 for $6.5 billion. Okta serves over 19,300 customers and reported $2.6 billion in revenue for fiscal year 2025. Okta trades on NASDAQ under the ticker OKTA.
San Francisco, CaliforniaFounded 2009
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#10
Cybersecurity & Digital DefenseVerified
Fractional CISO
Fractional CISO provides virtual Chief Information Security Officer services to mid-market companies, delivering board-ready security strategy, compliance programme management, and security leadership without the cost of a full-time executive. The firm helps companies achieve SOC 2, HIPAA, ISO 27001, and NIST compliance.
Boston, Massachusetts
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#11
Cybersecurity & Digital DefenseVerified
CISO Global
CISO Global (formerly Cerberus Cyber Sentinel) is a publicly traded cybersecurity company providing vCISO services, managed security operations, penetration testing, and compliance consulting. The company delivers fractional security leadership to organisations across healthcare, finance, government, and critical infrastructure.
Scottsdale, Arizona
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#12
Cybersecurity & Digital DefenseVerified
FRSecure
FRSecure is an information security consulting firm providing virtual CISO services, risk assessments, penetration testing, and the free SecurityStudio platform. The Minnesota-based company takes a mission-driven approach to making security accessible for mid-market organisations that cannot afford a full-time CISO.
Minneapolis, Minnesota
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Frequently asked
About Cybersecurity & Digital Defense serving Chicago
What is the top-rated Cybersecurity & Digital Defense serving Chicago?
CrowdStrike currently holds the #1 rank on DirJournal's Cybersecurity & Digital Defense listing for Chicago, Illinois. Rankings are recalculated as providers earn verification, publish pricing tiers, and accumulate reviews. See the ranked grid above for the full top 12.
How much do cybersecurity firms typically cost in Chicago?
Most cybersecurity firms publish pricing tiers on their DirJournal profile. Click any provider above to see their tiers, starting rate, and typical engagement size. Where pricing isn't listed, request a quote directly through the provider's contact link.
How does DirJournal rank cybersecurity firms for Chicago?
Providers are hand-vetted by our editorial team, then ranked by verification status, tier, rating, and review count. Only published listings appear. Location matching for the Chicago page runs city-first, expanding to statewide (Illinois) or nationwide only when local coverage is thin — this is clearly disclosed on the page when it happens.
Are these cybersecurity firms physically located in Chicago?
No. This page fell back to nationwide coverage because neither Chicago nor Illinois has enough locally indexed cybersecurity firms yet. Every provider listed serves Chicago clients remotely; none are physically located in Chicago.
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