Company lists · Data refreshed September 2026
Top 25 Cybersecurity companies based in Denver, United States
Our directory lists 75 cybersecurity companies based in Denver, United States, with 1,107 professional contacts and 618 email addresses. The list was last updated in September 2026, and New York is the single most-represented city among the companies listed.
Cybersecurity companies provide products and services that protect systems, networks, applications, devices, and data from unauthorized access, disruption, or misuse. This list covers companies that provide cybersecurity products, services, consulting, assessments, monitoring, incident response, or related protection for digital systems and data. Ranked by team size, largest first. Data current as of September 14, 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 companies 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 14, 2026Thanks. The Data Team will review it. | |||||
| 2 | 135 contacts → | ||||
Strong evidence “Our platform empowers businesses with comprehensive cybersecurity delivered through a single-agent platform.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 3 | 111 contacts → | ||||
Indirect 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 14, 2026Thanks. The Data Team will review it. | |||||
| 4 | 48 contacts → | ||||
Indirect evidence “Accuvant is a leading provider of information security services and solutions serving enterprise-class organizations across North America.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 5 | 30 contacts → | ||||
Strong evidence “DarkOwl is a Denver-based company that empowers organizations to continually improve their cybersecurity defenses using darknet intelligence.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 6 | 21 contacts → | ||||
Indirect evidence “Analytics partners with companies to maximize the growth, success, and prosperity of their business.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 7 | 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 14, 2026Thanks. The Data Team will review it. | |||||
| 8 | 19 contacts → | ||||
Indirect evidence “Your sensitive data still needs to be shared.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 9 | 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 14, 2026Thanks. The Data Team will review it. | |||||
| 10 | 13 contacts → | ||||
Indirect 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 14, 2026Thanks. The Data Team will review it. | |||||
| 11 | 12 contacts → | ||||
Indirect 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 14, 2026Thanks. The Data Team will review it. | |||||
| 12 | 11 contacts → | ||||
Indirect evidence “TruKno UAD is the first platform to unify Attack Emulation and Detection Engineering into one tool, one autonomous workflow, finding detection gaps, generating and deploying…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 13 | 7 contacts → | ||||
Strong evidence “How do you feel about your organization's IT and cybersecurity?” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 14 | 7 contacts → | ||||
Indirect evidence “Securing Critical Data and Systems.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 15 | 5 contacts → | ||||
Indirect 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 14, 2026Thanks. The Data Team will review it. | |||||
| 16 | 5 contacts → | ||||
Strong evidence “DevilDog specializes in making cybersecurity easy with complete customized security solutions from start to finish.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 17 | 5 contacts → | ||||
Indirect evidence “Every Cynthetic Systems engagement is managed and ongoing, not a one-time project.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 18 | 5 contacts → | ||||
Indirect evidence “Lost Rabbit Labs offers in-depth and comprehensive security assessments tailored specifically to meet any clients security needs.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 19 | 5 contacts → | ||||
Indirect evidence “IT.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 20 | 4 contacts → | ||||
Indirect 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 14, 2026Thanks. The Data Team will review it. | |||||
| 21 | 4 contacts → | ||||
Strong 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 14, 2026Thanks. The Data Team will review it. | |||||
| 22 | 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 14, 2026Thanks. The Data Team will review it. | |||||
| 23 | 4 contacts → | ||||
Indirect evidence “Why LibertyID?” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 24 | 3 contacts → | ||||
Indirect evidence “Specializing in Cyber, RF, and Reverse Engineering” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 25 | 3 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 14, 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 companies. 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 companies.
- Partial evidence
- Its own public description names part of cybersecurity companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name cybersecurity companies. 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 75 cybersecurity companies based in Denver, United States
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Cybersecurity companies based in Denver, United States at a glance
As of Sep 14, 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 75 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 companies, 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 companies”. 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 companies), 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 companies, 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, 618 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 14, 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 companies by metro in the United States
- Cybersecurity companies in New York334
- Cybersecurity companies in San Francisco190
- Cybersecurity companies in Austin187
- Cybersecurity companies in Washington166
- Cybersecurity companies in Atlanta154
- Cybersecurity companies in Houston149
- Cybersecurity companies in Miami146
- Cybersecurity companies in Dallas137
- Cybersecurity companies in Chicago124
- Cybersecurity companies in Tampa116
- Cybersecurity companies in Boston93
- Cybersecurity companies in San Diego91
- Cybersecurity companies in Arlington87
- Cybersecurity companies in Columbia81
- Cybersecurity companies in Los Angeles81
- Cybersecurity companies in Denver75
- Cybersecurity companies in San Jose74
- Cybersecurity companies in Las Vegas73
- Cybersecurity companies in Orlando71
- Cybersecurity companies in Seattle71
- Cybersecurity companies in Reston67
- Cybersecurity companies in San Antonio65
- Cybersecurity companies in Phoenix62
- Cybersecurity companies in Charlotte60
- Cybersecurity companies in Wilmington60
- Cybersecurity companies in Alexandria50
- Cybersecurity companies in Mclean50
- Cybersecurity companies in Huntsville49
- Cybersecurity companies in Baltimore47
- Cybersecurity companies in Dover47
- Cybersecurity companies in Fairfax46
- Cybersecurity companies in Sheridan46
- Cybersecurity companies in Portland45
- Cybersecurity companies in Pittsburgh41
- Cybersecurity companies in Palo Alto40
- Cybersecurity companies in Ashburn39
- Cybersecurity companies in Fort Lauderdale39
- Cybersecurity companies in Raleigh39
- Cybersecurity companies in Scottsdale39
- Cybersecurity companies in Herndon38
- Cybersecurity companies in Philadelphia38
- Cybersecurity companies in Plano37
- Cybersecurity companies in Santa Clara36
- Cybersecurity companies in Colorado Springs35
- Cybersecurity companies in Irvine32
- Cybersecurity companies in Minneapolis32
- Cybersecurity companies in Vienna32
- Cybersecurity companies in Nashville31
- Cybersecurity companies in Sunnyvale30
- Cybersecurity companies in Alpharetta29
- Cybersecurity companies in Richmond28
- Cybersecurity companies in Salt Lake City27
- Cybersecurity companies in Columbus26
- Cybersecurity companies in Frisco26
- Cybersecurity companies in Indianapolis26
- Cybersecurity companies in Ann Arbor25
- Cybersecurity companies in Cincinnati25
- Cybersecurity companies in Leesburg25
- Cybersecurity companies in Newark25
Frequently asked
How many cybersecurity companies are in the directory?
The directory lists 75 cybersecurity companies based in Denver, United States.
Which city has the most cybersecurity companies?
New York is the single most-represented city among the cybersecurity companies on the list.
How many contacts are available for cybersecurity companies?
The directory includes 1,107 professional contacts and 618 email addresses for the listed cybersecurity companies.
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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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