Company lists · Data refreshed September 2026

Top 22 Security consulting firms based in Boston, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 47 companies tracked

RevenueBase identified 47 security consulting firms headquartered in Boston, United States as of September 2026 and tracks 757 professional contacts across them, including 279 with verified work emails. New York is the largest hub.

This list covers security consulting firms headquartered in Boston, 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 6, 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 6, 2026 86% judged on-target in blind review

47Companies

757Contacts tracked

279Verified emails

Explore all 47 companies → Free signup · no credit card · 500 free credits

The 22 largest security consulting firms based in Boston, United States

Ranked by team size

Top 22 of 47 security consulting firms based in Boston, United States, ranked by team size, largest first. Data refreshed Sep 6, 2026. Evidence rates how directly each company's own description names 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	IANSPartial evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	51-200	327
	“For the security practitioner caught between rapidly evolving threats and demanding executives, IANS Research is a clear-headed resource for decision-making and articulating risk.” Source: company website · checked Sep 6, 2026
2	Windwalker GroupPartial evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	201-500	91
	“Windwalker is an award-winning small business with over 25 years of experience delivering cutting-edge security, IT, and training solutions.” Source: company website · checked Sep 6, 2026
3	NEW England Security Protective Services Agency INCPartial evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	n/a	34
	“New England Security is a full-service security company with the professional experience and resources to provide superior protection and to maximize your infrastructure…” Source: company website · checked Sep 6, 2026
4	The Edward Davis CompanyStrong evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	11-50	26
	“The Edward Davis Company (EDC) is an independent security risk management and consulting firm located in Boston, Massachusetts that provides actionable strategies to protect the…” Source: company website · checked Sep 6, 2026
5	Colossus Technologies GroupStrong evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	1-10	18
	“At Colossus Technologies Group, we provide top-tier cybersecurity and digital trust staffing, IT consulting, and project management solutions, including privacy, security, and GRC…” Source: company website · checked Sep 6, 2026
6	ProinfIndirect evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	51-200	14
	“Proinf is a complete suite of Cybersecurity and Professional Services Provider.” Source: company website · checked Sep 6, 2026
7	247 Group, LCStrong evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	1-10	12
	“Security advice to Federal Government, small and large businesses - Business development & consulting - DoD related Internet of Things (IoT) consulting - Military program…” Source: company website · checked Sep 6, 2026
8	Capitaltn LLCPartial evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	1-10	8
	“CapitalTN is a cutting-edge security company committed to redefining safety and peace of mind.” Source: company website · checked Sep 6, 2026
9	Pinnacle Security SolutionsStrong evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	1-10	6
	“Physical security consulting firm providing assessments (risk and existing conditions), security road mapping, security system design, project management, commissioning, and…” Source: company website · checked Sep 6, 2026
10	Evans Brothers Consulting LLCIndirect evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	1-10	4
	“No one knows Greater Boston better than the Evans Brothers.” Source: company website · checked Sep 6, 2026
11	HybridvalleyPartial evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	51-200	4
	“HybridValley is your technology consulting partner in all areas of information technology.” Source: company website · checked Sep 6, 2026
12	Buckley Technology Group, LLCPartial evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	1-10	4
	“Since its inception in Buckley Technology Group (BTG) has been a leading provider of financial industry solutions - offering superior consulting, implementation, and support…” Source: company website · checked Sep 6, 2026
13	Infersight LLCPartial evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	11-50	4
	“InferSight is one of the top trusted cyber security solutions partners in the industry.” Source: company website · checked Sep 6, 2026
14	Spherium Consulting GroupIndirect evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	1-10	4
	“Empowering organizations to secure their cloud, data, and identities with tailored protection and strategic expertise, we specialize in modern cybersecurity for Microsoft 365 and…” Source: company website · checked Sep 6, 2026
15	Crossroads Regulatory ConsultingPartial evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	1-10	4
	“Crossroads Regulatory Consulting provides expert consulting services that empower organizations to navigate complex regulatory landscapes with confidence, ensuring compliance…” Source: company website · checked Sep 6, 2026
16	Post ONE GlobalPartial evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	1-10	4
	“SECURITY ASSESSMENT AND MITIGATION STRATEGIES Domestic and International Crisis Assistance Staffed by retired foreign service professionals with more than six decades of combined…” Source: company website · checked Sep 6, 2026
17	Kaliber Data SecurityPartial evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	1-10	4
	“Kaliber helps companies Improve their cyber posture, reduce risk and improve AI security awareness.” Source: company website · checked Sep 6, 2026
18	Matthews & Matthews, LLCStrong evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	11-50	2
	“The founders and team at Matthews & Matthews, LLC provides trusted and confidential investigative, executive security, and management consulting expertise to Companies and…” Source: company website · checked Sep 6, 2026
19	Apparition, LLCPartial evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	11-50	2
	“At Apparition, LLC, we are more than just a security company - we are a team of professionals who share a deep commitment to protecting our clients' safety and security.” Source: company website · checked Sep 6, 2026
20	Aella Consulting Group, INCStrong evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	1-10	2
	“Aella Consulting Group provides total end-to-end security consulting services for End-users, Systems Integrators, Vendors and Investors.” Source: company website · checked Sep 6, 2026
21	Security Mindsets LLCPartial evidence	Boston, United StatesHQ checked Sep 6, 2026	1-10	1
	“Security Mindsets LLC is committed to providing companies with unique insight into the market through the delivery of quantitative analysis, forecasting, and market positioning…” Source: company website · checked Sep 6, 2026
22	SantsecIndirect evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	1-10	1
	“Santsec's approach to cybersecurity leverages a blend of real-world experience and cutting-edge technology.” Source: company website · checked Sep 6, 2026

Showing 22 of 47 security consulting firms based in Boston, United States

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Security consulting firms based in Boston, United States at a glance

As of Sep 6, 2026

1-10Median size (employees)

New YorkLargest hub · 189 HQs

Contacts with mobile numbers

Sep 6, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

5,001-10,000

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 Boston, over 47 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 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 Boston, United States whose own description of what they do matches “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 security consulting firms, and records with no verified work email. Companies headquartered outside Boston 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, 279 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 6, 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 consulting firms by metro in the United States

Frequently asked

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

RevenueBase identified 47 security consulting firms headquartered in Boston, 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?

IANS, headquartered in Boston, tops this list with the largest team on record.

Which city has the most security consulting firms?

New York leads with 189 headquartered companies, followed by Washington (139) and Houston (124).

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 279 verified decision-maker contacts tracked across these 47 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 6, 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.