Company lists · Data refreshed September 2026

Top 14 Cybersecurity businesses based in Annapolis, United States

Name: Cybersecurity businesses based in Annapolis, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 26 companies tracked

RevenueBase identified 26 company matches for cybersecurity businesses associated with Annapolis, United States as of September 2026 and tracks 340 professional contacts across them, including 195 with verified work emails. Across the United States, New York is the largest hub for this category (403 companies); Annapolis has 26.

This list covers company matches for cybersecurity businesses associated with Annapolis, 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 21, 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 21, 2026 How this list was built

26Companies

340Contacts tracked

195Verified emails

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The 14 largest cybersecurity businesses based in Annapolis, United States

Ranked by team size

Top 14 of 26 company matches for cybersecurity businesses based in Annapolis, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 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	Sixgen	Exact match	Annapolis, MD, United StatesHQ recorded Sep 21, 2026	51-200	103 contacts →
	Exact match “SIXGEN provides world-class cybersecurity services and products to protect government organizations and commercial industries.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2	Ardalyst	Exact match	Annapolis, MD, United StatesHQ recorded Sep 21, 2026	11-50	55 contacts →
	Exact match “Ardalyst is a digital risk management company that helps organizations thrive in the digital world by replacing uncertainty with understanding.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3	Redzone Technologies	Exact match	Annapolis, MD, United StatesHQ recorded Sep 21, 2026	51-200	52 contacts →
	Exact match “RedZone Technologies is redefining how organizations manage IT, cybersecurity, and compliance through its Continuous Confidence operating model.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4	Netsage	Exact match	Annapolis, MD, United StatesHQ recorded Sep 21, 2026	51-200	39 contacts →
	Exact match “NetSage Corporation (NetSage) is a mission-focused provider of cyber services to the US Federal Government.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5	Activecyber C-Suite Cybersecurity Advisors	Exact match	Annapolis, MD, United StatesHQ recorded Sep 21, 2026	11-50	17 contacts →
	Exact match “ACTIVECYBER is a team of cybersecurity and risk management professionals located in the Washington, D.C.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6	Korelogic	Exact match	Annapolis, MD, United StatesHQ recorded Sep 21, 2026	11-50	10 contacts →
	Exact match “In 2004, we founded KoreLogic to build an IT security company that was respected for the quality of its work and the caliber of our staff.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7	Black Eagle Defense	Exact match	Annapolis, MD, United StatesHQ recorded Sep 21, 2026	11-50	9 contacts →
	Exact match “Black Eagle Defense is a mission-first, Cybersecurity-focused, Information Technology organization.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8	Stratum Networks, INC	Exact match	Annapolis, MD, United StatesHQ recorded Sep 21, 2026	11-50	9 contacts →
	Exact match “Stratum Networks is an information assurance and cybersecurity solutions company with expert knowledge of implementing secure infrastructure, providing security integration…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9	IT Productivity	Exact match	Annapolis, MD, United StatesHQ recorded Sep 21, 2026	11-50	8 contacts →
	Exact match “IT Productivity helps business leaders accelerate their success, increase their teams productivity and protect (their data, IT system and reputation) within a fixed monthly cost.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10	Trusted Knight Corporation	Exact match	Annapolis, MD, United StatesHQ recorded Sep 21, 2026	11-50	3 contacts →
	Exact match “Trusted Knight protects digital business for organizations around the world.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11	Center For Cyber Security Training	Exact match	Annapolis, MD, United StatesHQ recorded Sep 21, 2026	1-10	2 contacts →
	Exact match “We are the best choice for cyber security training.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12	Blue CAP IT	Exact match	Annapolis, MD, United StatesHQ recorded Sep 21, 2026	1-10	2 contacts →
	Exact match “Blue Cap IT is a boutique managed service provider, Network as a Service (NaaS) reseller, and cybersecurity partner headquartered in Annapolis, Maryland, serving small and…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13	Fischer IT Solutions	Exact match	Annapolis, MD, United StatesHQ recorded Sep 21, 2026	1-10	2 contacts →
	Exact match “Helping Small Businesses Achieve Security, Efficiency, and Compliance Through Proactive Risk Management and Reliable IT Solutions” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14	Assevero Security Consulting, LLC	Exact match	Annapolis, MD, United StatesHQ recorded Sep 21, 2026	11-50	1 contacts →
	Exact match “Assevero Security Consulting, LLC is a veteran owned small business based in Annapolis, Maryland.” Recorded in the RevenueBase company graph · Sep 21, 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 “cybersecurity businesses”. 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 14 of 26 cybersecurity businesses based in Annapolis, United States

See the full list, filter by size, metro and specialty, and access 195 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Cybersecurity businesses based in Annapolis, United States at a glance

As of Sep 21, 2026

57.4%Verified-email coverage

13.1Average contacts per company

11-50Median size (employees)

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured across the whole United States list rather than for Annapolis, so it is reported there. Company counts and contact totals on this page are exact for Annapolis, over 26 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 Annapolis, United States whose business descriptions match “cybersecurity businesses” 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 195 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 21, 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.

Cybersecurity businesses 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 “cybersecurity businesses”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cybersecurity businesses are there based in Annapolis, United States?

RevenueBase identified 26 company matches for cybersecurity businesses associated with Annapolis, 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?

Sixgen 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 cybersecurity businesses?

New York leads the United States with 403 company records, followed by Austin (207) and Washington (203). Annapolis has 26.

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 195 professional contacts with verified work emails tracked across these 26 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 21, 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.