Company lists · Data refreshed September 2026

Top 25 Information security consulting firms based in Seattle, United States

Name: Information security consulting firms based in Seattle, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 72 companies tracked

RevenueBase identified 72 information security consulting firms headquartered in Seattle, United States as of September 2026 and tracks 373 professional contacts across them, including 136 with verified work emails. New York is the largest hub.

This list covers information security consulting firms 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.

How to read this list HQ checked on every row Match evidence on every row Refreshed Sep 3, 2026 86% judged on-target in blind review

72Companies

373Contacts tracked

136Verified emails

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The 25 largest information security consulting firms based in Seattle, United States

Ranked by team size

Top 25 of 72 information security consulting firms based in Seattle, United States, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names information 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.
#	Company	Headquarters	Employees	Contacts
1	Anvil SecureStrong evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	11-50	38
	“Anvil is an information security consulting firm focused on top tier consulting.” Source: company website · checked Sep 3, 2026
2	Kalles GroupPartial evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	11-50	35
	“Kalles Group partners with CIOs, CISOs, and security leaders to strengthen security programs, reduce operational risk, and build resilience during periods of change.” Source: company website · checked Sep 3, 2026
3	Advantage PartnersPartial evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	n/a	32
	“Advantage Partners is a security & compliance organization dedicated to helping emerging technology companies navigate the complexities of security and compliance.” Source: company website · checked Sep 3, 2026
4	DSEPartial evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	11-50	22
	“DSE is a boutique security firm with a focus on Active Directory.” Source: company website · checked Sep 3, 2026
5	Copperhead Consulting INCPartial evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	11-50	21
	“Copperhead Consulting is a team of highly capable Agents, Investigators, Special Operations Veterans and technical professionals.” Source: company website · checked Sep 3, 2026
6	Swat SystemsIndirect evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	11-50	20
	“SWAT Systems is now Convergence Networks!” Source: company website · checked Sep 3, 2026
7	Rhino Security Labs, INCPartial evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	11-50	20
	“Rhino Security Labs is a top penetration testing and security assessment firm with a focus on cloud pentesting (AWS, GCP, Azure), network pentesting, web application pentesting…” Source: company website · checked Sep 3, 2026
8	InterplayIndirect evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	1-10	15
	“Interplay IT is a trusted, Seattle-based IT partner specializing in Architecture, Engineering, Construction, and Mission-Driven Nonprofits.” Source: company website · checked Sep 3, 2026
9	Markgraf ConsultingStrong evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	11-50	12
	“Markgraf Consulting is a premier technology consulting firm specializing in SAP security, cloud solutions, and system architecture.” Source: company website · checked Sep 3, 2026
10	Secure Source International, LLCPartial evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	1-10	9
	“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: company website · checked Sep 3, 2026
11	Forge Technology AdvisorsPartial evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	11-50	7
	“Forge Technology Advisors provides a customized suite of IT and Telecommunications consulting services-including Cybersecurity, SASE, UCaaS, CCaaS, and Networking-tailored to meet…” Source: company website · checked Sep 3, 2026
12	Digital Seattle, INCPartial evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	51-200	5
	“Intelligent Technical Solutions is your trusted business partner for all your Cybersecurity, Managed and Co-managed IT support, Risk & Compliance, Data Analytics, and Consulting…” Source: company website · checked Sep 3, 2026
13	Security Research GroupPartial evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	1-10	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, 2026
14	Enetics NetworksIndirect evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	1-10	4
	“Enetics Networks was founded in 1998 to provide smart, cost-effective technology solutions for businesses throughout Washington state.” Source: company website · checked Sep 3, 2026
15	VertianceIndirect evidence	Seattle, United StatesHQ checked Sep 3, 2026	1-10	4
	“Trusted IT support, strategy, and cybersecurity for small businesses.” Source: company website · checked Sep 3, 2026
16	Differential NetworksStrong evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	1-10	3
	“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: company website · checked Sep 3, 2026
17	Crystal Peak SecurityPartial evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	1-10	3
	“A small, surgical team of security specialists with deep expertise in embedded systems, IoT, and connected hardware.” Source: company website · checked Sep 3, 2026
18	Positroniq, LLCPartial evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	1-10	3
	“At Positroniq, we help to protect organizations through assessment and advisory services designed to improve security, risk, and compliance programs and processes.” Source: company website · checked Sep 3, 2026
19	ZOVEPartial evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	11-50	2
	“Zove Security secures the products and platforms that power innovation and underpin all our digital lives.” Source: company website · checked Sep 3, 2026
20	Section9labsIndirect evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	1-10	2
	“Section9Labs is a startup based in Seattle, WA.” Source: company website · checked Sep 3, 2026
21	Culper Partners LLCStrong evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	1-10	2
	“Culper Partners offers strategic business consulting at the intersection of technology, national security, law enforcement, public policy and regulation.” Source: company website · checked Sep 3, 2026
22	Render ComplianceStrong evidence	Seattle, United StatesHQ checked Sep 3, 2026	1-10	2
	“Render Compliance is an information security audit firm for companies building battle-tested compliance programs.” Source: company website · checked Sep 3, 2026
23	Seattlepro EnterprisesIndirect evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	11-50	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, 2026
24	Stepfar Technology GroupIndirect evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	11-50	1
	“At Stepfar Technology Group, we are dedicated to empowering businesses with cutting-edge technology solutions.” Source: company website · checked Sep 3, 2026
25	Aorca IT Services & SoftwareIndirect evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	1-10	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, 2026

Showing 25 of 72 information security consulting firms based in Seattle, United States

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Information security consulting firms based in Seattle, United States at a glance

As of Sep 3, 2026

1-10Median size (employees)

New YorkLargest hub · 265 HQs

Contacts with mobile numbers

Sep 3, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

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 72 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 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 Seattle, United States whose own description of what they do matches “information 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 information security consulting firms, 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, 136 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 consulting firms by metro in the United States

Frequently asked

How many information security consulting firms are there based in Seattle, United States?

RevenueBase identified 72 information security consulting firms 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?

Anvil Secure, headquartered in Seattle, tops this list with the largest team on record.

Which city has the most information security consulting firms?

New York leads with 265 headquartered companies, followed by Washington (172) and Houston (170).

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 136 verified decision-maker contacts tracked across these 72 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.