Company lists · Data refreshed September 2026
Top 12 Security companies based in Boston, United States
This directory lists 25 security companies based in Boston, United States, with 518 contacts and 54 email addresses for business research and outreach. As of September 2026, New York is the single most-represented city among the companies on the list.
Security companies provide services, systems, or products that protect people, property, facilities, data, networks, or other assets from security threats. This list covers companies that provide security products or services, including physical security, cybersecurity, monitoring, access control, risk management, and related protection solutions. Ranked by team size, largest first. Data current as of 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.
The 12 largest security companies based in Boston, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | Windwalker GroupStrong evidence | 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, 2026Thanks. The Data Team will review it. | |||||
| 2 | Longwood Security Services, INCStrong evidence | 63 | |||
“Longwood Security Services delivers ‘in-house style security services, with contract muscle,’ to Boston area colleges and universities, hospitals and residential communities.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 3 | NEW England Security Protective Services Agency INCStrong evidence | 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, 2026Thanks. The Data Team will review it. | |||||
| 4 | MCH Security And Protective Services, LLCStrong evidence | 21 | |||
“MCH Security and Protective Services, LLC is a fully insured, bonded Security Company licensed by the Mass State Police CERT Unit.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | Nationwide Security Service INCStrong evidence | 8 | |||
“At Nationwide Security Service we are your single source security solution.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | 8 | ||||
“CapitalTN is a cutting-edge security company committed to redefining safety and peace of mind.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | Redcon Security LLCStrong evidence | 8 | |||
“Headquartered in Boston MA, Redcon Security aims to become the new industry standard for Security Guard Services.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | Pinnacle Security SolutionsStrong evidence | 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, 2026Thanks. The Data Team will review it. | |||||
| 9 | 5 | ||||
“ECM Security Inc.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 10 | Matthews & Matthews, LLCStrong evidence | 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, 2026Thanks. The Data Team will review it. | |||||
| 11 | 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, 2026Thanks. The Data Team will review it. | |||||
| 12 | 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, 2026Thanks. The Data Team will review it. | |||||
Showing 12 of 25 security companies based in Boston, United States
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Security companies based in Boston, United States at a glance
As of Sep 6, 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 Boston, over 25 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 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 Boston, United States whose own description of what they do matches “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 security companies, 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, 54 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 companies by metro in the United States
- Security companies in New York224
- Security companies in Los Angeles187
- Security companies in Houston184
- Security companies in Miami154
- Security companies in Chicago102
- Security companies in Atlanta99
- Security companies in Dallas99
- Security companies in Austin84
- Security companies in Phoenix84
- Security companies in Las Vegas67
- Security companies in Orlando66
- Security companies in San Antonio59
- Security companies in Tampa59
- Security companies in Charlotte56
- Security companies in Denver56
- Security companies in San Diego55
- Security companies in Indianapolis46
- Security companies in Sacramento46
- Security companies in San Francisco45
- Security companies in San Jose45
- Security companies in Jacksonville44
- Security companies in Seattle44
- Security companies in Baltimore42
- Security companies in Nashville37
- Security companies in Fort Lauderdale36
- Security companies in Columbus34
- Security companies in Memphis34
- Security companies in Portland34
- Security companies in Washington34
- Security companies in Philadelphia32
- Security companies in Raleigh32
- Security companies in Columbia31
- Security companies in Fort Worth31
- Security companies in Cincinnati30
- Security companies in Brooklyn29
- Security companies in Louisville28
- Security companies in Wilmington28
- Security companies in Albuquerque26
- Security companies in Richmond26
- Security companies in Riverside26
- Security companies in Springfield26
- Security companies in Boca Raton25
- Security companies in Boston25
- Security companies in Colorado Springs25
- Security companies in Irvine25
Frequently asked
How many security companies are based in Boston, United States?
RevenueBase counts 25 security companies based in Boston, United States on this list.
How many contacts and email addresses are available for security companies?
The list includes 518 contacts and 54 email addresses for security companies.
Which city has the most security companies on the list?
New York is the single most-represented city among the companies on the list.
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Security companies by geography
- Security companies based in the United States
- Security companies based in the United Kingdom
- Security companies based in Brazil
- Security companies based in France
- Security companies based in Canada
- Security companies based in Germany
- Security companies based in Italy
- Security companies based in Australia
- Security companies based in the Netherlands
- Security companies based in Mexico
- Security companies based in South Africa
- Security companies based in Spain
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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.