Company lists · Data refreshed September 2026

Top 25 Government cybersecurity contractors based in Denver, United States

Name: Government cybersecurity contractors based in Denver, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 49 companies tracked

RevenueBase identified 49 government cybersecurity contractors headquartered in Denver, United States as of September 2026 and tracks 792 professional contacts across them, including 460 with verified work emails. Across the United States, New York is the largest hub for this category (129 companies); Denver has 49.

This list covers government cybersecurity contractors 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

49Companies

792Contacts tracked

460Verified emails

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The 25 largest government cybersecurity contractors based in Denver, United States

Ranked by team size

Top 25 of 49 government cybersecurity contractors based in Denver, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to government cybersecurity contractors: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	RED Canary, A Zscaler Company	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	201-500	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, 2026
2	Directdefense	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	51-200	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 28, 2026
3	Accuvant	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	501-1,000	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 28, 2026
4	Point Solutions Group, LLC	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	51-200	25 contacts →
	Indirect evidence “While it’s good to have a technology department, sometimes you need to call in freaky smart and talented gals, guys and everyone in between as your go-to fixers.” Source: RevenueBase Database · checked Sep 28, 2026
5	Cyber Sainik	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	11-50	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, 2026
6	Alchemy Security, LLC	Partial evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	11-50	18 contacts →
	Partial 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, 2026
7	Point Solutions Security	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	11-50	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 28, 2026
8	Semper SEC	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	1-10	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 28, 2026
9	Devildog Cybersecurity	Partial evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	11-50	5 contacts →
	Partial evidence “DevilDog specializes in making cybersecurity easy with complete customized security solutions from start to finish.” Source: RevenueBase Database · checked Sep 28, 2026
10	Cynthetic Systems	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	1-10	5 contacts →
	Indirect evidence “Every Cynthetic Systems engagement is managed and ongoing, not a one-time project.” Source: RevenueBase Database · checked Sep 28, 2026
11	Lost Rabbit Labs	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	1-10	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 28, 2026
12	Class IV	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	1-10	5 contacts →
	Indirect evidence “IT.” Source: RevenueBase Database · checked Sep 28, 2026
13	M2dcon Technologies LLC	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	1-10	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 28, 2026
14	Technologywest	Partial evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	1-10	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, 2026
15	Cypress Data Defense	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	11-50	4 contacts →
	Indirect evidence “At Cypress Data Defense, our goal is to help organizations secure their IT and Application Development Operations using a pragmatic, risk-based approach.” Source: RevenueBase Database · checked Sep 28, 2026
16	Technology Response Team, LLC	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	11-50	4 contacts →
	Indirect evidence “Is your team losing precious minutes (or hours) with computers being down- Do you know what you would do if your company was attacked by an email phishing scam and all your data…” Source: RevenueBase Database · checked Sep 28, 2026
17	Tapzeo	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	1-10	4 contacts →
	Indirect evidence “Technology Aligned with your Business.” Source: RevenueBase Database · checked Sep 28, 2026
18	Iron Aegis LLC	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	11-50	3 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
19	Brush Cyber	Partial evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	51-200	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, 2026
20	Rockcyber	Partial evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	11-50	3 contacts →
	Partial 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, 2026
21	Ironline Security	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “Ironline Security is a vendor-agnostic consultancy that helps solve your information security problems.” Source: RevenueBase Database · checked Sep 28, 2026
22	Security Pursuit, LLC	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “Security Pursuit provides computer security services to help organizations protect their business-critical information systems.” Source: RevenueBase Database · checked Sep 28, 2026
23	KI Security And Compliance Group	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	11-50	2 contacts →
	Indirect evidence “For over twenty years, one of Ki Security and Compliance Group’s primary focuses has been combating ever expanding threats on enterprise networks and across the internet.” Source: RevenueBase Database · checked Sep 28, 2026
24	Brighter & Brighter	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “When implemented well technology is the platform to make your organization GROW.” Source: RevenueBase Database · checked Sep 28, 2026
25	Spydersec	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “SpyderSec is an information security consulting organization with a straightforward mission: To enhance the security posture of our clients.” Source: RevenueBase Database · checked Sep 28, 2026

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: government cybersecurity contractors. 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 government cybersecurity contractors.
Partial evidence: Its own public description names part of government cybersecurity contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name government cybersecurity contractors. 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 49 government cybersecurity contractors based in Denver, United States

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Government cybersecurity contractors based in Denver, United States at a glance

As of Sep 28, 2026

58.1%Verified-email coverage

16.2Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 49 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 government cybersecurity contractors, 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 “government cybersecurity contractors”. 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 government cybersecurity contractors), 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 government cybersecurity contractors, 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, 460 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.

Government cybersecurity contractors by metro in the United States

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 government cybersecurity contractors, 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 government cybersecurity contractors are there based in Denver, United States?

RevenueBase identified 49 government cybersecurity contractors 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 government cybersecurity contractors?

New York leads the United States with 129 headquartered companies, followed by Washington (124) and Atlanta (101). Denver has 49.

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 460 verified decision-maker contacts tracked across these 49 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.