Company lists · Data refreshed September 2026

Top 23 IT security consulting firms based in Denver, United States

RevenueBase identified 68 IT security consulting firms headquartered in Denver, United States as of September 2026 and tracks 574 professional contacts across them, including 290 with verified work emails. New York is the largest hub.

This list covers IT security consulting 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, how directly it supports the match, and when it was last checked. Data refreshed September 4, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 4, 2026 86% judged on-target in blind review
68Companies
574Contacts tracked
290Verified emails
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The 23 largest IT security consulting firms based in Denver, United States

Ranked by team size
Top 23 of 68 IT security consulting firms based in Denver, United States, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names IT security consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
DirectdefensePartial evidence
Denver, CO, United StatesHQ checked Sep 4, 202651-200112

“DirectDefense provides enterprise risk assessments, penetration testing, ICS/SCADA security services, and 24/7 managed security services for companies of all sizes.”

Source: company website · checked Sep 4, 2026
2
Zivaro, A Trace3 CompanyIndirect evidence
Denver, CO, United StatesHQ checked Sep 4, 202651-200108

“With a legacy spanning over twenty years, Zivaro is a veteran in the Colorado tech space.”

Source: company website · checked Sep 4, 2026
3
AccuvantPartial evidence
Denver, CO, United StatesHQ checked Sep 4, 2026501-1,00048

“Accuvant is a leading provider of information security services and solutions serving enterprise-class organizations across North America.”

Source: company website · checked Sep 4, 2026
4Denver, CO, United StatesHQ checked Sep 4, 202651-20032

“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: company website · checked Sep 4, 2026
5
Analytics ComputersIndirect evidence
Denver, CO, United StatesHQ checked Sep 4, 202611-5021

“Analytics partners with companies to maximize the growth, success, and prosperity of their business.”

Source: company website · checked Sep 4, 2026
6
Alchemy Security, LLCPartial evidence
Denver, CO, United StatesHQ checked Sep 4, 202611-5018

“Alchemy Security is a boutique cybersecurity firm dedicated to giving organizations a Defender's Advantage through a suite of innovative products and services.”

Source: company website · checked Sep 4, 2026
7
CoravantIndirect evidence
Denver, CO, United StatesHQ checked Sep 4, 20261-1013

“Coravant operationalizes innovation.”

Source: company website · checked Sep 4, 2026
8
Point Solutions SecurityPartial evidence
Denver, CO, United StatesHQ checked Sep 4, 202611-5013

“Point Solutions Security was born from a belief that anything is possible when you step outside your comfort zone and push boundaries.”

Source: company website · checked Sep 4, 2026
9
Semper SECStrong evidence
Denver, CO, United StatesHQ checked Sep 4, 20261-1012

“Semper Sec is a cyber security consulting firm that helps businesses build security programs and navigate compliance in order maintain competitive advantage.”

Source: company website · checked Sep 4, 2026
10Denver, CO, United StatesHQ checked Sep 4, 202611-507

“How do you feel about your organization's IT and cybersecurity?”

Source: company website · checked Sep 4, 2026
11
PCG SystemsIndirect evidence
Denver, CO, United StatesHQ checked Sep 4, 202611-505

“At PCG Systems, we help organizations across industry sectors bring bold strategies to life in unexpected ways.”

Source: company website · checked Sep 4, 2026
12
Lost Rabbit LabsPartial evidence
Denver, CO, United StatesHQ checked Sep 4, 20261-105

“Lost Rabbit Labs offers in-depth and comprehensive security assessments tailored specifically to meet any clients security needs.”

Source: company website · checked Sep 4, 2026
13
Devildog CybersecurityPartial evidence
Denver, CO, United StatesHQ checked Sep 4, 202611-504

“DevilDog specializes in making cybersecurity easy with complete customized security solutions from start to finish.”

Source: company website · checked Sep 4, 2026
14
Class IVPartial evidence
Denver, CO, United StatesHQ checked Sep 4, 20261-104

IT.”

Source: company website · checked Sep 4, 2026
15
Cypress Data DefensePartial evidence
Denver, CO, United StatesHQ checked Sep 4, 202611-504

“At Cypress Data Defense, our goal is to help organizations secure their IT and Application Development Operations using a pragmatic, risk-based approach.”

Source: company website · checked Sep 4, 2026
16
TapzeoIndirect evidence
Denver, CO, United StatesHQ checked Sep 4, 20261-104

“Technology Aligned with your Business.”

Source: company website · checked Sep 4, 2026
17
Brush CyberPartial evidence
Denver, CO, United StatesHQ checked Sep 4, 202651-2003

“At Brush Cyber, we understand that in today's digital landscape, cybersecurity isn't just an afterthought-it's a strategic imperative.”

Source: company website · checked Sep 4, 2026
18
Iron Aegis LLCIndirect evidence
Denver, CO, United StatesHQ checked Sep 4, 202611-503
Source: company website · checked Sep 4, 2026
19Denver, CO, United StatesHQ checked Sep 4, 20261-103

“Bespoke Technology Group was founded on the premise that Information Technology should be seen as a source of revenue and efficiency.”

Source: company website · checked Sep 4, 2026
20
Gagnon Consulting, LLCStrong evidence
Denver, CO, United StatesHQ checked Sep 4, 20261-103

“We offer IT consulting services, including SOC 1 and SOC 2 plus HIPAA, ISO, NIST, GDPR readiness, IT SOX Internal Audit support, control design, system implementation (SDLC)…”

Source: company website · checked Sep 4, 2026
21
Ironline SecurityPartial evidence
Denver, CO, United StatesHQ checked Sep 4, 20261-103

“Ironline Security is a vendor-agnostic consultancy that helps solve your information security problems.”

Source: company website · checked Sep 4, 2026
22
Security Pursuit, LLCPartial evidence
Denver, CO, United StatesHQ checked Sep 4, 20261-103

Security Pursuit provides computer security services to help organizations protect their business-critical information systems.”

Source: company website · checked Sep 4, 2026
23
RockcyberPartial evidence
Denver, CO, United StatesHQ checked Sep 4, 202611-502

“RockCyber, a premier cybersecurity firm, is laser-focused on providing cutting-edge security services that protect businesses from dynamic cyber threats.”

Source: company website · checked Sep 4, 2026

Showing 23 of 68 IT security consulting firms based in Denver, United States

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IT security consulting firms based in Denver, United States at a glance

As of Sep 4, 2026
1-10Median size (employees)
New YorkLargest hub · 239 HQs
Contacts with mobile numbers
Sep 4, 2026Data refreshed

Companies by employee count

1-10
40
11-50
21
51-200
4
201-500
1
501-1,000
1

Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Denver, over 68 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 IT security consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “IT security consulting firms”. Matching reads each company's description, not its industry code or its name.
What we exclude
Companies whose own description does not clearly place them among IT security consulting 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 an evidence 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, 290 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 4, 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.

IT security consulting firms by metro in the United States

Frequently asked

How many IT security consulting firms are there based in Denver, United States?

RevenueBase identified 68 IT security consulting 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?

Directdefense, headquartered in Denver, tops this list with the largest team on record.

Which city has the most IT security consulting firms?

New York leads with 239 headquartered companies, followed by Houston (148) and Atlanta (139).

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 290 verified decision-maker contacts tracked across these 68 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 4, 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 SmartSearch, 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.