Company lists · Data refreshed September 2026
Top 22 IT security companies based in Washington, United States
RevenueBase identified 90 IT security companies headquartered in Washington, United States as of September 2026 and tracks 1,020 professional contacts across them, including 364 with verified work emails. New York is the largest hub.
This list covers IT security companies headquartered in Washington, 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.
The 22 largest IT security companies based in Washington, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 111 | ||||
“Illuminate provides government agencies, commercial enterprises, and network operators with the data, services, and technology that helps them protect the information that…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 2 | Shorepoint INCIndirect evidence | 107 | |||
“ShorePoint recognizes that cybersecurity is the challenge of our generation.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 3 | 101 | ||||
“Arlo Solutions (Arlo), is a Washington, DC professional services company, providing cybersecurity and management consulting services to the US government in the defense…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 4 | 92 | ||||
“Adlumin, an N-able company, provides enterprise-grade cybersecurity for organizations of all sizes through its innovative Security Operations as a Service platform.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 5 | 89 | ||||
“First Health Advisory partners with healthcare and government organizations to strengthen cybersecurity strategy, build operational resilience, and safeguard patient care.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 6 | 74 | ||||
“REDLattice™ is a U.S-owned global defense tech company delivering preeminent digital access for its customers within the global intelligence community, law enforcement, and…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 7 | 30 | ||||
“At JSOC IT, we don’t just offer cybersecurity solutions-we build resilient, secure environments tailored to your business needs.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 8 | Valens GlobalPartial evidence | 25 | |||
“Valens Global takes a comprehensive, methodical, and thoughtful approach to security.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 9 | 23 | ||||
“Biztec helps organizations simplify technology, strengthen security, and operate with confidence.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 10 | The Teneo GroupIndirect evidence | 16 | |||
“Keeping your operations moving and your network secure is our priority because we know that’s your priority.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 11 | 16 | ||||
“The Efiia Group delivers cybersecurity solutions for Government.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 12 | 15 | ||||
“Helping U.S.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 13 | BluecoatIndirect evidence | 10 | |||
“When intentional or negligent acts threaten your company’s reputation and survival, your best defense is BlueCoat’s proven cybersecurity and risk management team.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 14 | 9 | ||||
“InGuardians, Inc is an independent information security consulting company based in Washington D.C.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 15 | 8 | ||||
“Apavo is a mission-driven cybersecurity firm specializing in compliance-heavy security execution and operational security support for DoD and Intelligence Community environments.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 16 | 7 | ||||
“Annuk Incorporated is a Cybersecurity and Technology consulting services and solutions company.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 17 | TPS CyberPartial evidence | 7 | |||
“TPS Cyber provides Information Security Professional services focused on outcomes that Promote Business and Protect your Brand.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 18 | 6 | ||||
“CyberAssure provides expert cybersecurity services to public and private sector organizations of every size to assure effective information security governance, risk management…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 19 | PraxtionIndirect evidence | 5 | |||
“We are a team of passionate professionals who are dedicated to helping businesses thrive in today’s digital landscape.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 20 | 5 | ||||
“CloudByte Group is a managed IT and cybersecurity firm headquartered in McLean, Virginia.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 21 | Calano & Associates, LLCIndirect evidence | 4 | |||
“Calano & Associates, Inc.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 22 | 4 | ||||
“Welcome to Aardwolf – your partner in navigating the complex world of information technology.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
Showing 22 of 90 IT security companies based in Washington, United States
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IT security companies based in Washington, United States at a glance
As of Sep 4, 2026Companies by employee count
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 Washington, over 90 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 companies, 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 Washington, United States whose own description of what they do matches “IT security companies”. 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 companies, and records with no verified work email. Companies headquartered outside Washington 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, 364 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 companies by metro in the United States
- IT security companies in New York163
- IT security companies in Miami102
- IT security companies in Houston99
- IT security companies in Chicago98
- IT security companies in Atlanta95
- IT security companies in Austin93
- IT security companies in Washington90
- IT security companies in San Francisco81
- IT security companies in Dallas80
- IT security companies in Tampa75
- IT security companies in Los Angeles59
- IT security companies in San Diego57
- IT security companies in Charlotte51
- IT security companies in Orlando50
- IT security companies in Boston48
- IT security companies in Columbia48
- IT security companies in Denver48
- IT security companies in Arlington45
- IT security companies in Las Vegas44
- IT security companies in Phoenix43
- IT security companies in San Antonio41
- IT security companies in Seattle36
- IT security companies in Reston33
- IT security companies in Baltimore32
- IT security companies in Scottsdale32
- IT security companies in Fairfax31
- IT security companies in Pittsburgh30
- IT security companies in Raleigh30
- IT security companies in Wilmington29
- IT security companies in Alexandria28
- IT security companies in Huntsville28
- IT security companies in Sheridan28
- IT security companies in Mclean27
Frequently asked
How many IT security companies are there based in Washington, United States?
RevenueBase identified 90 IT security companies headquartered in Washington, 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?
Illuminate Technologies, headquartered in Washington, tops this list with the largest team on record.
Which city has the most IT security companies?
New York leads with 163 headquartered companies, followed by Miami (102) and Houston (99).
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 364 verified decision-maker contacts tracked across these 90 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.
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