Company lists · Data refreshed October 2026
Top 25 Application security service providers based in Denver, United States
RevenueBase identified 42 application security service providers headquartered in Denver, United States as of October 2026 and tracks 350 professional contacts across them, including 168 with verified work emails. Across the United States, New York is the largest hub for this category (132 companies); Denver has 42.
This list covers application security service providers 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 October 1, 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 application security service providers based in Denver, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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 Oct 1, 2026Thanks. The Data Team will review it. | |||||
| 2 | 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 Oct 1, 2026Thanks. The Data Team will review it. | |||||
| 3 | 35 contacts → | ||||
Strong evidence “Transform application security with complete discovery of your API landscape, automated dev-native testing workflows, and actionable remediation guidance – at the pace of AI.” Source: RevenueBase Database · checked Oct 1, 2026Thanks. The Data Team will review it. | |||||
| 4 | 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 Oct 1, 2026Thanks. The Data Team will review it. | |||||
| 5 | 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 Oct 1, 2026Thanks. The Data Team will review it. | |||||
| 6 | 7 contacts → | ||||
Partial evidence “Securing Critical Data and Systems.” Source: RevenueBase Database · checked Oct 1, 2026Thanks. The Data Team will review it. | |||||
| 7 | 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 Oct 1, 2026Thanks. The Data Team will review it. | |||||
| 8 | 5 contacts → | ||||
Partial evidence “DevilDog specializes in making cybersecurity easy with complete customized security solutions from start to finish.” Source: RevenueBase Database · checked Oct 1, 2026Thanks. The Data Team will review it. | |||||
| 9 | 5 contacts → | ||||
Indirect evidence “Every Cynthetic Systems engagement is managed and ongoing, not a one-time project.” Source: RevenueBase Database · checked Oct 1, 2026Thanks. The Data Team will review it. | |||||
| 10 | 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 Oct 1, 2026Thanks. The Data Team will review it. | |||||
| 11 | 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 Oct 1, 2026Thanks. The Data Team will review it. | |||||
| 12 | 4 contacts → | ||||
Indirect 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 Oct 1, 2026Thanks. The Data Team will review it. | |||||
| 13 | 4 contacts → | ||||
Partial 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 Oct 1, 2026Thanks. The Data Team will review it. | |||||
| 14 | 3 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Oct 1, 2026Thanks. The Data Team will review it. | |||||
| 15 | 3 contacts → | ||||
Indirect 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 Oct 1, 2026Thanks. The Data Team will review it. | |||||
| 16 | 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 Oct 1, 2026Thanks. The Data Team will review it. | |||||
| 17 | 3 contacts → | ||||
Partial evidence “Security Pursuit provides computer security services to help organizations protect their business-critical information systems.” Source: RevenueBase Database · checked Oct 1, 2026Thanks. The Data Team will review it. | |||||
| 18 | 2 contacts → | ||||
Partial evidence “SpyderSec is an information security consulting organization with a straightforward mission: To enhance the security posture of our clients.” Source: RevenueBase Database · checked Oct 1, 2026Thanks. The Data Team will review it. | |||||
| 19 | 2 contacts → | ||||
Strong evidence “Absio moves data security to the top of the stack with application-level data security solutions and consulting services.” Source: RevenueBase Database · checked Oct 1, 2026Thanks. The Data Team will review it. | |||||
| 20 | 2 contacts → | ||||
Indirect evidence “Delivering full service small business IT support and protecting Colorado small businesses from malware and cyber-related risk.” Source: RevenueBase Database · checked Oct 1, 2026Thanks. The Data Team will review it. | |||||
| 21 | 2 contacts → | ||||
Strong evidence “Artifice Security simulates real-world cyberattacks on your network, applications, infrastructure, and personnel to uncover hidden security risks and deliver clear, actionable…” Source: RevenueBase Database · checked Oct 1, 2026Thanks. The Data Team will review it. | |||||
| 22 | 2 contacts → | ||||
Partial evidence “Cyber Security has become an ongoing battle to defend against an ever-evolving group of adversaries & threat actors, in a world increasingly dependent on information and…” Source: RevenueBase Database · checked Oct 1, 2026Thanks. The Data Team will review it. | |||||
| 23 | 1 contacts → | ||||
Partial evidence “Digital Silence is a world-class provider of information security research and consulting services.” Source: RevenueBase Database · checked Oct 1, 2026Thanks. The Data Team will review it. | |||||
| 24 | 1 contacts → | ||||
Partial evidence “Welcome to Darkthorn Security, the leading provider of cutting-edge penetration testing services fortified by the Threat Intelligence Driven Engagement (TIDE) methodology.” Source: RevenueBase Database · checked Oct 1, 2026Thanks. The Data Team will review it. | |||||
| 25 | 1 contacts → | ||||
Indirect evidence “CloudSapio is a premier cybersecurity and technology consulting firm, renowned for delivering exceptional guidance and innovative solutions to a broad spectrum of clients, ranging…” Source: RevenueBase Database · checked Oct 1, 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: application security service providers. 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 application security service providers.
- Partial evidence
- Its own public description names part of application security service providers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name application security service providers. 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 42 application security service providers based in Denver, United States
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Application security service providers based in Denver, United States at a glance
As of Oct 1, 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 42 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 application security service providers, 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 “application security service providers”. 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 application security service providers), 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 application security service providers, 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, 168 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 October 1, 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.
Application security service providers by metro in the United States
- Application security service providers in New York132
- Application security service providers in Austin92
- Application security service providers in San Francisco87
- Application security service providers in Atlanta82
- Application security service providers in Dallas78
- Application security service providers in Houston74
- Application security service providers in Washington74
- Application security service providers in Miami73
- Application security service providers in Chicago67
- Application security service providers in Tampa59
- Application security service providers in Columbia46
- Application security service providers in Los Angeles45
- Application security service providers in San Diego45
- Application security service providers in Boston43
- Application security service providers in Arlington41
- Application security service providers in Las Vegas37
- Application security service providers in Orlando37
- Application security service providers in Charlotte35
- Application security service providers in Seattle33
- Application security service providers in Reston31
- Application security service providers in Baltimore30
- Application security service providers in Dover30
- Application security service providers in San Antonio29
- Application security service providers in San Jose29
- Application security service providers in Wilmington29
- Application security service providers in Alexandria28
- Application security service providers in Huntsville28
- Application security service providers in Mclean28
- Application security service providers in Phoenix28
- Application security service providers in Fairfax26
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 application security service providers, 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 application security service providers are there based in Denver, United States?
RevenueBase identified 42 application security service providers headquartered in Denver, United States as of October 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 in the United States has the most application security service providers?
New York leads the United States with 132 headquartered companies, followed by Austin (92) and San Francisco (87). Denver has 42.
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 168 verified decision-maker contacts tracked across these 42 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 1, 2026.
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Application security service providers by geography
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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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