Company lists · Data refreshed September 2026
Top 13 Security consultant companies based in Seattle, United States
RevenueBase identified 36 security consultant companies headquartered in Seattle, United States as of September 2026 and tracks 314 professional contacts across them, including 145 with verified work emails. New York is the largest hub.
This list covers security consultant companies headquartered in Seattle, 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 21, 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 13 largest security consultant companies based in Seattle, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 107 contacts → | ||||
Partial evidence “IOActive is a trusted partner for Global enterprises, providing research-fueled security services across all industries.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 39 contacts → | ||||
Partial evidence “Anvil is an information security consulting firm focused on top tier consulting.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 36 contacts → | ||||
Partial evidence “Kalles Group partners with CIOs, CISOs, and security leaders to strengthen security programs, reduce operational risk, and build resilience during periods of change.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 21 contacts → | ||||
Indirect evidence “Copperhead Consulting is a team of highly capable Agents, Investigators, Special Operations Veterans and technical professionals.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 10 contacts → | ||||
Partial evidence “Secure Source International is a global security risk mitigation firm that serves family offices, HNW individuals, corporate enterprises and law firms throughout the US and Europe.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 3 contacts → | ||||
Partial evidence “At Signal Security of Western Washington, our unwavering commitment is to set the gold standard in security services across residential, commercial, retail, and institutional…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 3 contacts → | ||||
Partial evidence “We are an IT consulting team that partners with clients to elevate their IT security skills and knowledge in crafting, deploying, and supporting intelligent and leading-edge IP…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 3 contacts → | ||||
Partial evidence “At Positroniq, we help to protect organizations through assessment and advisory services designed to improve security, risk, and compliance programs and processes.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 2 contacts → | ||||
Indirect evidence “Section9Labs is a startup based in Seattle, WA.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 2 contacts → | ||||
Partial evidence “Verification Labs is a Seattle-based security company that places an emphasis on doing extremely in-depth technical testing so we can provide our clients with the most thorough…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 1 contacts → | ||||
Indirect evidence “At Stepfar Technology Group, we are dedicated to empowering businesses with cutting-edge technology solutions.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 1 contacts → | ||||
Strong evidence “Fretwork Security Advisors is a consultancy dedicated to delivering multi-disciplinary advisory services to clients in the executive suite.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 1 contacts → | ||||
Partial evidence “Security should be for humans, not just the few who work in the industry.” Source: RevenueBase Database · checked Sep 21, 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: security consultant 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 security consultant companies.
- Partial evidence
- Its own public description names part of security consultant companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name security consultant 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 13 of 36 security consultant companies based in Seattle, United States
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Security consultant companies based in Seattle, United States at a glance
As of Sep 21, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than for Seattle, so it is reported there. Company counts and contact totals on this page are exact for Seattle, over 36 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 security consultant 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 Seattle, United States whose own description of what they do matches “security consultant 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 security consultant 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 security consultant companies, and records with no verified work email. Companies headquartered outside Seattle 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, 145 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 21, 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.
Security consultant companies by metro in the United States
- Security consultant companies in New York108
- Security consultant companies in Houston80
- Security consultant companies in Atlanta74
- Security consultant companies in Washington69
- Security consultant companies in Chicago60
- Security consultant companies in Austin57
- Security consultant companies in Dallas57
- Security consultant companies in Los Angeles55
- Security consultant companies in Miami50
- Security consultant companies in San Francisco48
- Security consultant companies in Tampa46
- Security consultant companies in Denver37
- Security consultant companies in Seattle36
- Security consultant companies in Arlington34
- Security consultant companies in Charlotte33
- Security consultant companies in San Diego31
- Security consultant companies in Boston30
- Security consultant companies in Phoenix29
- Security consultant companies in Raleigh27
- Security consultant companies in Reston27
- Security consultant companies in Minneapolis26
- Security consultant companies in San Antonio26
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 security consultant companies, 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 security consultant companies are there based in Seattle, United States?
RevenueBase identified 36 security consultant companies headquartered in Seattle, 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?
Ioactive, INC, headquartered in Seattle, tops this list with the largest team on record.
Which city has the most security consultant companies?
New York leads with 108 headquartered companies, followed by Houston (80) and Atlanta (74).
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 145 verified decision-maker contacts tracked across these 36 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 21, 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.
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