Company lists · Data refreshed September 2026

Top 23 Managed security service providers based in Boston, United States

Name: Managed security service providers based in Boston, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 14, 2026 51 companies tracked

RevenueBase identified 51 company matches for managed security service providers associated with Boston, United States as of September 2026 and tracks 5,001 professional contacts across them, including 2,083 with verified work emails. Across the United States, New York is the largest hub for this category (200 companies); Boston has 51.

This list covers company matches for managed security service providers associated with Boston, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 14, 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 RevenueBase SmartSearch · Exact Recorded Sep 14, 2026 How this list was built

51Companies

5,001Contacts tracked

2,083Verified emails

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The 23 largest managed security service providers based in Boston, United States

Ranked by team size

Top 23 of 51 company matches for managed security service providers based in Boston, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 14, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Rapid7	Exact match	Boston, MA, United StatesHQ recorded Sep 14, 2026	1,001-5,000	2,822 contacts →
	Exact match “Rapid7, Inc.(NASDAQ: RPD) is a global leader in AI-powered managed cybersecurity operations, trusted to advance organizations’ cyber resilience.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
2	Bitsight	Exact match	Boston, MA, United StatesHQ recorded Sep 14, 2026	501-1,000	752 contacts →
	Exact match “Bitsight is the global leader in cyber risk intelligence, leveraging advanced AI to empower organizations with precise insights derived from the industry’s most extensive external…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
3	Continuum	Exact match	Boston, MA, United StatesHQ recorded Sep 14, 2026	1,001-5,000	387 contacts →
	Exact match “Continuum, a ConnectWise company, is the proactive platform for what’s next.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
4	IANS	Exact match	Boston, MA, United StatesHQ recorded Sep 14, 2026	51-200	327 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
5	Cynet Security	Exact match	Boston, MA, United StatesHQ recorded Sep 14, 2026	201-500	309 contacts →
	Exact match “Cynet’s unified, AI-powered cybersecurity platform brings together a full suite of security capabilities in a single, simple solution, backed by 24x7 SOC support.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
6	EIQ Networks	Exact match	Boston, MA, United StatesHQ recorded Sep 14, 2026	51-200	57 contacts →
	Exact match “EiQ, a pioneer in hybrid security as a service, is transforming how mid-market organizations build enterprise-class security programs.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
7	Tracelay	Exact match	Boston, MA, United StatesHQ recorded Sep 14, 2026	11-50	51 contacts →
	Exact match “Founded by elite cybersecurity entrepreneurs in collaboration with partners with expertise in the intelligence community, Tracelay brings together global expertise and…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
8	Abusix, INC	Exact match	Boston, MA, United StatesHQ recorded Sep 14, 2026	11-50	31 contacts →
	Exact match “At Abusix, we empower businesses, ISPs, and email service providers with cutting-edge security solutions to safeguard digital infrastructure.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
9	Freeze	Exact match	Boston, MA, United StatesHQ recorded Sep 14, 2026	11-50	22 contacts →
	Exact match “Freeze is the premium cybersecurity and privacy solution trusted by leading organizations to mitigate risks such as social engineering, phishing, financial fraud, hacks, attacks…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
10	Colossus Technologies Group	Exact match	Boston, MA, United StatesHQ recorded Sep 14, 2026	1-10	18 contacts →
	Exact match “At Colossus Technologies Group, we provide top-tier cybersecurity and digital trust staffing, IT consulting, and project management solutions, including privacy, security, and GRC…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
11	Acelium	Exact match	Boston, United StatesHQ recorded Sep 14, 2026	51-200	14 contacts →
	Exact match “Is a cybersecurity engineering company that delivers live operational and executive oversight of IT infrastructure and cybersecurity posture to enterprise customers globally.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
12	Proinf	Exact match	Boston, MA, United StatesHQ recorded Sep 14, 2026	51-200	14 contacts →
	Exact match “Proinf is a complete suite of Cybersecurity and Professional Services Provider.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
13	EOS Systems	Exact match	Boston, MA, United StatesHQ recorded Sep 14, 2026	11-50	13 contacts →
	Exact match “Eos Systems, a leader in cyber security and technology delivery services, has been helping clients solve complex technology challenges for over 25 years.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
14	Vault America	Exact match	Boston, MA, United StatesHQ recorded Sep 14, 2026	1-10	7 contacts →
	Exact match “Since 2004, Vault America has safeguarded customers’ data and their businesses with automated and scalable, industry compliant cyber and data security services, aligned under our…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
15	Redsense	Exact match	Boston, MA, United StatesHQ recorded Sep 14, 2026	11-50	6 contacts →
	Exact match “RedSense provides industry-leading intelligence services, adversary space interaction & monitoring, net flow monitoring and interpretation, and the development of custom threat…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
16	Seralys	Exact match	Boston, United StatesHQ recorded Sep 14, 2026	1-10	5 contacts →
	Exact match “Seralys is a boutique cybersecurity firm founded in 2012.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
17	Hybridvalley	Exact match	Boston, MA, United StatesHQ recorded Sep 14, 2026	51-200	4 contacts →
	Exact match “HybridValley is your technology consulting partner in all areas of information technology.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
18	Infersight LLC	Exact match	Boston, MA, United StatesHQ recorded Sep 14, 2026	11-50	4 contacts →
	Exact match “InferSight is one of the top trusted cyber security solutions partners in the industry.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
19	Salt Cybersecurity	Exact match	Boston, MA, United StatesHQ recorded Sep 14, 2026	11-50	4 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
20	Spherium Consulting Group	Exact match	Boston, MA, United StatesHQ recorded Sep 14, 2026	1-10	4 contacts →
	Exact match “Empowering organizations to secure their cloud, data, and identities with tailored protection and strategic expertise, we specialize in modern cybersecurity for Microsoft 365 and…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
21	Arsenal Cyber Force	Exact match	Boston, MA, United StatesHQ recorded Sep 14, 2026	1-10	2 contacts →
	Exact match “At Arsenal we are dedicated to delivering premier cybersecurity solutions, safeguarding our clients' digital landscapes.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
22	Quantumstrike	Exact match	Boston, MA, United StatesHQ recorded Sep 14, 2026	201-500	1 contacts →
	Exact match “A global interdisciplinary analytics-driven and human-focused cybersecurity company which delivers innovative security solutions that ensure companies do what they do best -…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
23	Santsec	Exact match	Boston, MA, United StatesHQ recorded Sep 14, 2026	1-10	1 contacts →
	Exact match “Santsec's approach to cybersecurity leverages a blend of real-world experience and cutting-edge technology.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “managed security service providers”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 23 of 51 managed security service providers based in Boston, United States

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Managed security service providers based in Boston, United States at a glance

As of Sep 14, 2026

41.7%Verified-email coverage

98.1Average contacts per company

11-50Median size (employees)

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

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 51 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with Boston, United States whose business descriptions match “managed security service providers” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 2,083 professional contacts with verified work emails across the full matched dataset. 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.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Managed security service providers by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “managed security service providers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many managed security service providers are there based in Boston, United States?

RevenueBase identified 51 company matches for managed security service providers associated with Boston, United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Rapid7 tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most managed security service providers?

New York leads the United States with 200 company records, followed by Houston (120) and Austin (117). Boston has 51.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 2,083 professional contacts with verified work emails tracked across these 51 companies; direct dials are available where recorded.

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 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.