Company lists · Data refreshed September 2026

Top 11 Cyber security specialists based in Boston, United States

RevenueBase identified 34 cyber security specialists headquartered in Boston, United States as of September 2026 and tracks 187 professional contacts across them, including 47 with verified work emails. New York is the largest hub.

This list covers cyber security specialists 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 14, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 14, 2026 86% judged on-target in blind review
34Companies
187Contacts tracked
47Verified emails
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The 11 largest cyber security specialists based in Boston, United States

Ranked by team size
Top 11 of 34 cyber security specialists based in Boston, United States, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to cyber security specialists: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceBoston, MA, United StatesHQ checked Sep 14, 20261-1018 contacts →

Partial evidence

“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: RevenueBase Database · checked Sep 14, 2026
2Indirect evidenceBoston, United StatesHQ checked Sep 14, 202651-20014 contacts →

Indirect evidence

“Is a cybersecurity engineering company that delivers live operational and executive oversight of IT infrastructure and cybersecurity posture to enterprise customers globally.”

Source: RevenueBase Database · checked Sep 14, 2026
3Indirect evidenceBoston, MA, United StatesHQ checked Sep 14, 202651-20014 contacts →

Indirect evidence

“Proinf is a complete suite of Cybersecurity and Professional Services Provider.”

Source: RevenueBase Database · checked Sep 14, 2026
4Strong evidenceBoston, MA, United StatesHQ checked Sep 14, 202611-5013 contacts →

Strong evidence

“Eos Systems, a leader in cyber security and technology delivery services, has been helping clients solve complex technology challenges for over 25 years.”

Source: RevenueBase Database · checked Sep 14, 2026
5Indirect evidenceBoston, United StatesHQ checked Sep 14, 20261-105 contacts →

Indirect evidence

“Seralys is a boutique cybersecurity firm founded in 2012.”

Source: RevenueBase Database · checked Sep 14, 2026
6Indirect evidenceBoston, MA, United StatesHQ checked Sep 14, 202651-2004 contacts →

Indirect evidence

“HybridValley is your technology consulting partner in all areas of information technology.”

Source: RevenueBase Database · checked Sep 14, 2026
7Strong evidenceBoston, MA, United StatesHQ checked Sep 14, 202611-504 contacts →

Strong evidence

“InferSight is one of the top trusted cyber security solutions partners in the industry.”

Source: RevenueBase Database · checked Sep 14, 2026
8Partial evidenceBoston, MA, United StatesHQ checked Sep 14, 202611-504 contacts →

Partial evidence

“The SaltCISO Solution AN ESSENTIAL ALL-IN-ONE CYBERSECURITY SOLUTION Salt Cybersecurity sifted through the multitude of security products and services, determined what was most…”

Source: RevenueBase Database · checked Sep 14, 2026
9Indirect evidenceBoston, MA, United StatesHQ checked Sep 14, 20261-104 contacts →

Indirect evidence

“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: RevenueBase Database · checked Sep 14, 2026
10Indirect evidenceBoston, MA, United StatesHQ checked Sep 14, 20261-102 contacts →

Indirect evidence

“At Arsenal we are dedicated to delivering premier cybersecurity solutions, safeguarding our clients' digital landscapes.”

Source: RevenueBase Database · checked Sep 14, 2026
11Partial evidenceBoston, MA, United StatesHQ checked Sep 14, 2026201-5001 contacts →

Partial evidence

“A global interdisciplinary analytics-driven and human-focused cybersecurity company which delivers innovative security solutions that ensure companies do what they do best -…”

Source: RevenueBase Database · checked Sep 14, 2026

Showing 11 of 34 cyber security specialists based in Boston, United States

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Cyber security specialists based in Boston, United States at a glance

As of Sep 14, 2026
25.1%Verified-email coverage
5.5Average contacts per company
1-10Median size (employees)
291.2%Largest-city concentration · New York
Sep 14, 2026Page data refreshed

Companies by employee count

1-10
19
11-50
9
51-200
4
201-500
1
501-1,000
1

Email recency for this list is measured across the whole United States list rather than for Boston, so it is reported there. Company counts and contact totals on this page are exact for Boston, over 34 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 cyber security specialists, 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 Boston, United States whose own description of what they do matches “cyber security specialists”. 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 cyber security specialists), 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 cyber security specialists, 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 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, 47 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 14, 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.

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 cyber security specialists, 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 cyber security specialists are there based in Boston, United States?

RevenueBase identified 34 cyber security specialists 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?

Colossus Technologies Group, headquartered in Boston, tops this list with the largest team on record.

Which city has the most cyber security specialists?

New York leads with 99 headquartered companies, followed by Houston (70) and Atlanta (69).

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 47 verified decision-maker contacts tracked across these 34 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 14, 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.