Company lists · Data refreshed September 2026
Top 10 Information security companies based in Seattle, United States
RevenueBase identified 36 information security companies headquartered in Seattle, United States as of September 2026 and tracks 1,280 professional contacts across them, including 664 with verified work emails. New York is the largest hub.
This list covers information security 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, how directly it supports the match, and when it was last checked. Data refreshed September 3, 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 10 largest information security companies based in Seattle, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,054 | ||||
“WatchGuard® Technologies, Inc.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 2 | 126 | ||||
“Secure your data across any database, cloud, and AI service from a single platform.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 3 | 22 | ||||
“DSE is a boutique security firm with a focus on Active Directory.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 4 | 20 | ||||
“SWAT Systems is now Convergence Networks!” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 5 | Security Research GroupPartial evidence | 4 | |||
“Security Research Group provides military-grade cybersecurity solutions, specializing in threat detection, compliance, incident response, and custom cyber strategies to protect…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 6 | Vcto SecureIndirect evidence | 3 | |||
“VCTO Secure empowers clients by Making I.T.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 7 | Seattlepro EnterprisesIndirect evidence | 1 | |||
“SeattlePro Enterprises is a close-knit team of creative visionaries offering companies the guidance and education professionals need to stay competitive in today's market.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 8 | Stepfar Technology GroupIndirect evidence | 1 | |||
“At Stepfar Technology Group, we are dedicated to empowering businesses with cutting-edge technology solutions.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 9 | 1 | ||||
“At Aorca, we deliver reliable, secure, and strategic IT services designed to help businesses thrive in an increasingly digital world.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 10 | 1 | ||||
“Fretwork Security Advisors is a consultancy dedicated to delivering multi-disciplinary advisory services to clients in the executive suite.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
Showing 10 of 36 information security companies based in Seattle, United States
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Information security companies based in Seattle, United States at a glance
As of Sep 3, 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 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 information 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 Seattle, United States whose own description of what they do matches “information 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 information security 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 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, 664 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 3, 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.
Information security companies by metro in the United States
- Information security companies in New York172
- Information security companies in Houston102
- Information security companies in Atlanta98
- Information security companies in Miami98
- Information security companies in Washington95
- Information security companies in Austin93
- Information security companies in Chicago90
- Information security companies in Dallas88
- Information security companies in San Francisco82
- Information security companies in Tampa74
- Information security companies in San Diego59
- Information security companies in Los Angeles57
- Information security companies in Arlington53
- Information security companies in Charlotte51
- Information security companies in Boston49
- Information security companies in Denver49
- Information security companies in Orlando48
- Information security companies in Columbia47
- Information security companies in San Antonio41
- Information security companies in Las Vegas40
- Information security companies in Phoenix37
- Information security companies in Seattle36
- Information security companies in Reston34
- Information security companies in Alexandria33
- Information security companies in Scottsdale32
- Information security companies in Baltimore29
- Information security companies in Fairfax29
- Information security companies in Raleigh29
- Information security companies in Sheridan29
- Information security companies in Huntsville28
- Information security companies in Mclean28
- Information security companies in Pittsburgh28
- Information security companies in San Jose28
- Information security companies in Wilmington28
- Information security companies in Ashburn25
- Information security companies in Columbus25
- Information security companies in Minneapolis25
Frequently asked
How many information security companies are there based in Seattle, United States?
RevenueBase identified 36 information security 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?
Watchguard Technologies, headquartered in Seattle, tops this list with the largest team on record.
Which city has the most information security companies?
New York leads with 172 headquartered companies, followed by Houston (102) and Atlanta (98).
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 664 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 3, 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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