Company lists · Data refreshed September 2026

Top 24 Managed security service providers based in Columbia, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 56 companies tracked

RevenueBase identified 56 managed security service providers headquartered in Columbia, United States as of September 2026 and tracks 2,140 professional contacts across them, including 654 with verified work emails. New York is the largest hub.

This list covers managed security service providers headquartered in Columbia, 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 5, 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 5, 2026 86% judged on-target in blind review

56Companies

2,140Contacts tracked

654Verified emails

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The 24 largest managed security service providers based in Columbia, United States

Ranked by team size

Top 24 of 56 managed security service providers based in Columbia, United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names managed security service providers: 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	HuntressIndirect evidence	Columbia, MD, United StatesHQ checked Sep 5, 2026	501-1,000	696
	“Protect Your Endpoints, Identities, Logs, and Employees.” Source: company website · checked Sep 5, 2026
2	Vc3Partial evidence	Columbia, SC, United StatesHQ checked Sep 5, 2026	501-1,000	495
	“VC3 is a managed IT and cybersecurity services provider serving organizations throughout the US and Canada.” Source: company website · checked Sep 5, 2026
3	Sealing Technologies, A Parsons CompanyIndirect evidence	Columbia, MD, United StatesHQ checked Sep 5, 2026	51-200	119
	“SealingTech, a Parsons Company, rapidly delivers innovative, agile cybersecurity solutions that modernize, protect, and defend the networks and systems of the federal government…” Source: company website · checked Sep 5, 2026
4	Sourcefire, Part Of CiscoIndirect evidence	Columbia, MD, United StatesHQ checked Sep 5, 2026	501-1,000	63
	“Sourcefire, Inc.(Nasdaq:FIRE), a world leader in intelligent cybersecurity solutions, is transforming the way global mid- to large-size organizations and government agencies…” Source: company website · checked Sep 5, 2026
5	Applied Network Solutions, INCIndirect evidence	Columbia, MD, United StatesHQ checked Sep 5, 2026	51-200	57
	“We operate at the intersection of network engineering and cybersecurity, providing secure, scalable, and high-performing architectures for our customers.” Source: company website · checked Sep 5, 2026
6	Cyberpoint InternationalIndirect evidence	Columbia, MD, United StatesHQ checked Sep 5, 2026	51-200	34
	“CyberPoint is dedicated to advancing the discipline of cybersecurity through imagination, technical excellence, and an unparalleled passion for our work.” Source: company website · checked Sep 5, 2026
7	SRC Technologies INCIndirect evidence	Columbia, MD, United StatesHQ checked Sep 5, 2026	51-200	30
	“SRC Technologies, INC provides information technology (IT) consultation services to government agencies and corporations alike, specializing in secure computing services.” Source: company website · checked Sep 5, 2026
8	Advantage Industries, INCIndirect evidence	Columbia, MD, United StatesHQ checked Sep 5, 2026	11-50	29
	“For over two decades, Advantage Industries has worked collaboratively with our clients in understanding complex business processes, identifying needs, and providing…” Source: company website · checked Sep 5, 2026
9	Sixmap, INCIndirect evidence	Columbia, MD, United StatesHQ checked Sep 5, 2026	11-50	25
	“SixMap bridges the gap between what cyber defenders are protecting and what adversaries uncover through reconnaissance.” Source: company website · checked Sep 5, 2026
10	NcyberPartial evidence	Columbia, MD, United StatesHQ checked Sep 5, 2026	51-200	19
	“Ncyber ("en-cyber") is a data-driven information security company based in Columbia MD.” Source: company website · checked Sep 5, 2026
11	Secure Innovations, LLCIndirect evidence	Columbia, MD, United StatesHQ checked Sep 5, 2026	51-200	13
	“Our highly-skilled professionals have an average of 20+ years of experience working with, and in, the public sector.” Source: company website · checked Sep 5, 2026
12	White Cliffs Consulting, LLCPartial evidence	Columbia, MD, United StatesHQ checked Sep 5, 2026	51-200	9
	“White Cliffs Consulting is a small cyber intelligence and security firm providing high-end consulting and technical services in network analysis, software development and…” Source: company website · checked Sep 5, 2026
13	Cyber Protection ServicesIndirect evidence	Columbia, MD, United StatesHQ checked Sep 5, 2026	11-50	8
	“Cyber Protection Services is a certified SDVOSB dedicated to protecting businesses against the cyber threats that evolve daily.” Source: company website · checked Sep 5, 2026
14	Camelot SecureIndirect evidence	Columbia, MD, United StatesHQ checked Sep 5, 2026	51-200	8
	“Our Secure360 platform is a holistic redefinition of what world-class cybersecurity strategies can be.” Source: company website · checked Sep 5, 2026
15	Shield 7 ConsultingIndirect evidence	Columbia, MD, United StatesHQ checked Sep 5, 2026	11-50	8
	“Shield 7 operates as a Veteran Owned consulting firm and VAR based in Maryland.” Source: company website · checked Sep 5, 2026
16	Captivator TechnologiesIndirect evidence	Columbia, MD, United StatesHQ checked Sep 5, 2026	11-50	4
	“Captivator TECHNOLOGIES is a growing digital solutions provider specializing in delivering innovative and efficient solutions tailored to the needs of businesses and individuals.” Source: company website · checked Sep 5, 2026
17	Coefficient Technologies LLC DBA Surveillent CyberPartial evidence	Columbia, SC, United StatesHQ checked Sep 5, 2026	1-10	3
	“Coefficient Technologies provides the most up-to-date cyber security solutions, strategies, and IT services to help companies defend themselves from known and unknown APTs and…” Source: company website · checked Sep 5, 2026
18	Trimia, INCPartial evidence	Columbia, MD, United StatesHQ checked Sep 5, 2026	1-10	3
	“We have over 30 years of real world experience in identifying and developing innovative technologies and solutions to help meet our customers Data and Cyber Security challenges.” Source: company website · checked Sep 5, 2026
19	Greysys LLCPartial evidence	Columbia, MD, United StatesHQ checked Sep 5, 2026	1-10	3
	“Greysys LLC is a small information security focused research and development company based in Maryland.” Source: company website · checked Sep 5, 2026
20	Interceptor CyberopsIndirect evidence	Columbia, MD, United StatesHQ checked Sep 5, 2026	11-50	2
	“Today, data has become the world’s most valuable (and vulnerable) resource.” Source: company website · checked Sep 5, 2026
21	TraversedPartial evidence	Columbia, MD, United StatesHQ checked Sep 5, 2026	1-10	2
	“Traversed provides Managed IT Services, Incident Response, and Data Recovery Services.” Source: company website · checked Sep 5, 2026
22	Ramparts SecurityIndirect evidence	Columbia, MD, United StatesHQ checked Sep 5, 2026	1-10	2
	“The Ramparts team has over 3 decades of experience performing threat analysis for critical infrastructure and defense systems, and over a decade of experience leading adversarial…” Source: company website · checked Sep 5, 2026
23	Panoptcy SecurityPartial evidence	Columbia, SC, United StatesHQ checked Sep 5, 2026	1-10	2
	“Panoptcy Security is a cybersecurity firm that combines high-level talent, advanced tools, interdisciplinary models, and data science to advance cyber resiliency.” Source: company website · checked Sep 5, 2026
24	Banshee Cybersecurity LLCIndirect evidence	Columbia, MO, United StatesHQ checked Sep 5, 2026	1-10	1
	“Many small businesses avoid cybersecurity because they are overwhelmed or by it, or because they feel uncertain, assuming they are protected.” Source: company website · checked Sep 5, 2026

Showing 24 of 56 managed security service providers based in Columbia, United States

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

As of Sep 5, 2026

11-50Median size (employees)

New YorkLargest hub · 200 HQs

Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

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 Columbia, over 56 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 managed security service providers, 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 Columbia, United States whose own description of what they do matches “managed security service providers”. 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 managed security service providers, and records with no verified work email. Companies headquartered outside Columbia 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, 654 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 5, 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.

Managed security service providers by metro in the United States

Frequently asked

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

RevenueBase identified 56 managed security service providers headquartered in Columbia, 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?

Huntress, headquartered in Columbia, tops this list with the largest team on record.

Which city has the most managed security service providers?

New York leads with 200 headquartered companies, followed by Houston (120) and Austin (117).

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 654 verified decision-maker contacts tracked across these 56 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 5, 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.