Company lists · Data refreshed September 2026
Top 25 Cybersecurity and physical security firms based in Denver, United States
RevenueBase identified 63 cybersecurity and physical security firms headquartered in Denver, United States as of September 2026 and tracks 1,020 professional contacts across them, including 487 with verified work emails. Across the United States, New York is the largest hub for this category (244 companies); Denver has 63.
This list covers cybersecurity and physical security firms headquartered in Denver, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest cybersecurity and physical security firms based in Denver, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 408 contacts → | ||||
Indirect evidence “Red Canary stops cyber threats no one else does, so organizations can fearlessly pursue their missions.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 2 | 111 contacts → | ||||
Partial evidence “DirectDefense provides enterprise risk assessments, penetration testing, ICS/SCADA security services, and 24/7 managed security services for companies of all sizes.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 3 | 48 contacts → | ||||
Partial evidence “Accuvant is a leading provider of information security services and solutions serving enterprise-class organizations across North America.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 4 | 28 contacts → | ||||
Indirect evidence “There are many things beyond our control in business today; the economy, competition, escalating operating costs.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 5 | 21 contacts → | ||||
Partial evidence “ETG Systems is a technology company specializing in security integration and fire suppression systems.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 6 | 21 contacts → | ||||
Indirect evidence “Cyber Sainik protects organizations from contemporary, sophisticated threats by delivering enterprise-level tools, methods, procedures, and profound expertise, alongside…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 7 | 18 contacts → | ||||
Strong evidence “Alchemy Security is a boutique cybersecurity firm dedicated to giving organizations a Defender's Advantage through a suite of innovative products and services.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 8 | 13 contacts → | ||||
Partial evidence “Point Solutions Security was born from a belief that anything is possible when you step outside your comfort zone and push boundaries.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 9 | 12 contacts → | ||||
Partial evidence “Semper Sec is a cyber security consulting firm that helps businesses build security programs and navigate compliance in order maintain competitive advantage.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 10 | 9 contacts → | ||||
Partial evidence “TRT Defense provides security professionals who are state licensed, well qualified, experienced and committed to exceptional customer service.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 11 | 7 contacts → | ||||
Partial evidence “How do you feel about your organization's IT and cybersecurity?” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 12 | 7 contacts → | ||||
Partial evidence “Securing Critical Data and Systems.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 13 | 6 contacts → | ||||
Partial evidence “We are an Electronic Security Integrator specializing in CCTV, Intrusion Detection and Acces Control Systems.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 14 | 5 contacts → | ||||
Partial evidence “Colorado Cyber Security Consulting Firm We cater our consultative services to companies that want to verify the effectiveness of their information system security measures.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 15 | 5 contacts → | ||||
Strong evidence “DevilDog specializes in making cybersecurity easy with complete customized security solutions from start to finish.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 16 | 5 contacts → | ||||
Indirect evidence “Every Cynthetic Systems engagement is managed and ongoing, not a one-time project.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 17 | 5 contacts → | ||||
Partial evidence “Lost Rabbit Labs offers in-depth and comprehensive security assessments tailored specifically to meet any clients security needs.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 18 | 4 contacts → | ||||
Partial evidence “Culture of Awareness Security is more than the sum of its parts Some MSP’s work hard with the technical: Firewalls, patches, anti-virus, web filtering, Zero Trust, SEIM…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 19 | 4 contacts → | ||||
Partial evidence “TechnologyWest is a Colorado-based IT services provider delivering cybersecurity solutions, managed IT services, cloud infrastructure, networking, unified communications, and…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 20 | 4 contacts → | ||||
Indirect evidence “Thunder Rock is a technology company that is dedicated to making sure your business can function optimally and efficiently while reducing waste.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 21 | 3 contacts → | ||||
Indirect evidence “Specializing in Cyber, RF, and Reverse Engineering” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 22 | 3 contacts → | ||||
Indirect evidence “Galileo Systems Group is a premiere technology solutions provider (TSP) focusing on small to medium sized businesses (SMBs).” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 23 | 3 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 24 | 3 contacts → | ||||
Partial evidence “At Brush Cyber, we understand that in today's digital landscape, cybersecurity isn't just an afterthought-it's a strategic imperative.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 25 | 3 contacts → | ||||
Strong evidence “RockCyber, a premier cybersecurity firm, is laser-focused on providing cutting-edge security services that protect businesses from dynamic cyber threats.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: cybersecurity and physical security firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names cybersecurity and physical security firms.
- Partial evidence
- Its own public description names part of cybersecurity and physical security firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name cybersecurity and physical security firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 63 cybersecurity and physical security firms based in Denver, United States
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Cybersecurity and physical security firms based in Denver, United States at a glance
As of Sep 28, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than for Denver, so it is reported there. Company counts and contact totals on this page are exact for Denver, over 63 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among cybersecurity and physical security firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in Denver, United States whose own description of what they do matches “cybersecurity and physical security firms”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names cybersecurity and physical security firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among cybersecurity and physical security firms, and records with no verified work email. Companies headquartered outside Denver are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 487 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 28, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Cybersecurity and physical security firms by metro in the United States
- Cybersecurity and physical security firms in New York244
- Cybersecurity and physical security firms in Houston153
- Cybersecurity and physical security firms in Miami141
- Cybersecurity and physical security firms in Austin138
- Cybersecurity and physical security firms in Atlanta129
- Cybersecurity and physical security firms in Washington128
- Cybersecurity and physical security firms in Dallas126
- Cybersecurity and physical security firms in Chicago123
- Cybersecurity and physical security firms in Tampa108
- Cybersecurity and physical security firms in San Francisco98
- Cybersecurity and physical security firms in Los Angeles96
- Cybersecurity and physical security firms in San Diego71
- Cybersecurity and physical security firms in Orlando67
- Cybersecurity and physical security firms in Arlington65
- Cybersecurity and physical security firms in Charlotte63
- Cybersecurity and physical security firms in Las Vegas61
- Cybersecurity and physical security firms in Columbia60
- Cybersecurity and physical security firms in San Antonio60
- Cybersecurity and physical security firms in Boston58
- Cybersecurity and physical security firms in Phoenix57
- Cybersecurity and physical security firms in Seattle57
- Cybersecurity and physical security firms in Reston50
- Cybersecurity and physical security firms in Baltimore48
- Cybersecurity and physical security firms in Mclean45
- Cybersecurity and physical security firms in Alexandria44
- Cybersecurity and physical security firms in Wilmington43
- Cybersecurity and physical security firms in Huntsville42
- Cybersecurity and physical security firms in San Jose42
- Cybersecurity and physical security firms in Fairfax41
- Cybersecurity and physical security firms in Sheridan39
- Cybersecurity and physical security firms in Ashburn38
- Cybersecurity and physical security firms in Indianapolis38
- Cybersecurity and physical security firms in Pittsburgh38
- Cybersecurity and physical security firms in Fort Lauderdale37
- Cybersecurity and physical security firms in Herndon36
- Cybersecurity and physical security firms in Plano36
- Cybersecurity and physical security firms in Raleigh36
- Cybersecurity and physical security firms in Irvine35
- Cybersecurity and physical security firms in Richmond35
- Cybersecurity and physical security firms in Scottsdale35
- Cybersecurity and physical security firms in Portland34
- Cybersecurity and physical security firms in Columbus33
- Cybersecurity and physical security firms in Nashville33
- Cybersecurity and physical security firms in Colorado Springs32
- Cybersecurity and physical security firms in Philadelphia28
- Cybersecurity and physical security firms in Dover27
- Cybersecurity and physical security firms in Boca Raton25
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names cybersecurity and physical security firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many cybersecurity and physical security firms are there based in Denver, United States?
RevenueBase identified 63 cybersecurity and physical security firms headquartered in Denver, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
RED Canary, A Zscaler Company, headquartered in Denver, tops this list with the largest team on record.
Which city in the United States has the most cybersecurity and physical security firms?
New York leads the United States with 244 headquartered companies, followed by Houston (153) and Miami (141). Denver has 63.
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 487 verified decision-maker contacts tracked across these 63 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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