Company lists · Data refreshed September 2026

Top 25 Cybersecurity investment firms based in the United States

Name: Cybersecurity investment firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 1,045 companies tracked

RevenueBase identified 1,045 cybersecurity investment firms headquartered in the United States as of September 2026 and tracks 13,482 professional contacts across them, including 4,616 with verified work emails. New York is the largest hub.

This list covers cybersecurity investment firms headquartered in the 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 28, 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 28, 2026 86% judged on-target in blind review

1,045Companies

13,482Contacts tracked

4,616Verified emails

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The 25 largest cybersecurity investment firms based in the United States

Ranked by team size

Top 25 of 1,045 cybersecurity investment firms based in the United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity investment firms: 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Guidepoint Security	Partial evidence	Reston, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,232 contacts →
	Partial evidence “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: RevenueBase Database · checked Sep 28, 2026
2	Fireeye, INC	Indirect evidence	Milpitas, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	676 contacts →
	Indirect evidence “We are now officially Trellix!” Source: RevenueBase Database · checked Sep 28, 2026
3	Vehere	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	201-500	211 contacts →
	Indirect evidence “Vehere is an AI cyber defense company operating at the intersection of national security and enterprise security.” Source: RevenueBase Database · checked Sep 28, 2026
4	Deepseas	Indirect evidence	Globally Distributed, United StatesHQ checked Sep 28, 2026	201-500	182 contacts →
	Indirect evidence “With 30 years of experience in cyber defense, DeepSeas is trusted by nearly clients around the world, including Fortune 100 enterprises and mid-market organizations, municipality…” Source: RevenueBase Database · checked Sep 28, 2026
5	Cyber Advisors	Indirect evidence	Maple Grove, MN, United StatesHQ checked Sep 28, 2026	201-500	176 contacts →
	Indirect evidence “Cyber Advisors is a nationwide leader in cyber security, providing a comprehensive range of Offensive, Defensive, and Risk Management services.” Source: RevenueBase Database · checked Sep 28, 2026
6	Stratascale	Partial evidence	Charlotte, NC, United StatesHQ checked Sep 28, 2026	201-500	171 contacts →
	Partial evidence “Stratascale is a premier services company proudly operating as the cybersecurity division of SHI.” Source: RevenueBase Database · checked Sep 28, 2026
7	Defendedge	Partial evidence	Elmhurst, IL, United StatesHQ checked Sep 28, 2026	51-200	167 contacts →
	Partial evidence “DefendEdge is a leading US-based cybersecurity firm specializing in protecting clients' firewalls, endpoints, and applications against cyber threats and vulnerabilities.” Source: RevenueBase Database · checked Sep 28, 2026
8	Merlin Cyber	Strong evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	51-200	160 contacts →
	Strong evidence “Merlin is a powerful ecosystem of cybersecurity investment, innovation, technical expertise, and go-to-market acceleration with 25 years of experience working with the U.S.” Source: RevenueBase Database · checked Sep 28, 2026
9	Nuharbor	Partial evidence	Colchester, VT, United StatesHQ checked Sep 28, 2026	51-200	151 contacts →
	Partial evidence “nuHarbor is a U.S-based cybersecurity firm trusted by public sector and critical infrastructure organizations nationwide.” Source: RevenueBase Database · checked Sep 28, 2026
10	Accorian	Indirect evidence	East Brunswick, NJ, United StatesHQ checked Sep 28, 2026	51-200	148 contacts →
	Indirect evidence “At Accorian, we don’t just advise on compliance, we operationalize it.” Source: RevenueBase Database · checked Sep 28, 2026
11	Fidelis Security	Indirect evidence	Riverside, CA, United StatesHQ checked Sep 28, 2026	51-200	147 contacts →
	Indirect evidence “Fidelis Security® is the industry innovator in proactive cyber defense, safeguarding modern IT for global enterprises with proactive XDR and CNAPP platforms.” Source: RevenueBase Database · checked Sep 28, 2026
12	Synersys Technologies INC	Indirect evidence	Cedar Park, TX, United StatesHQ checked Sep 28, 2026	201-500	143 contacts →
	Indirect evidence “At Synersys Technologies, we help small and mid-sized enterprises build secure, scalable, and high-performance technology environments.” Source: RevenueBase Database · checked Sep 28, 2026
13	Helpsystems	Indirect evidence	Eden Prairie, MN, United StatesHQ checked Sep 28, 2026	1,001-5,000	131 contacts →
	Indirect evidence “HelpSystems has long been known for helping organizations become more secure and autonomous.” Source: RevenueBase Database · checked Sep 28, 2026
14	Maveris	Partial evidence	Martinsburg, WV, United StatesHQ checked Sep 28, 2026	51-200	119 contacts →
	Partial evidence “Maveris is an IT and cybersecurity company committed to helping organizations create secure digital solutions to accelerate their mission.” Source: RevenueBase Database · checked Sep 28, 2026
15	Sealing Technologies, A Parsons Company	Partial evidence	Columbia, MD, United StatesHQ checked Sep 28, 2026	51-200	119 contacts →
	Partial evidence “SealingTech, a Parsons Company, rapidly delivers innovative, agile cybersecurity solutions that modernize, protect, and defend the networks and systems of the federal government…” Source: RevenueBase Database · checked Sep 28, 2026
16	YL Ventures	Partial evidence	Mill Valley, CA, United StatesHQ checked Sep 28, 2026	11-50	118 contacts →
	Partial evidence “YL Ventures is a venture capital firm dedicated exclusively to cybersecurity.” Source: RevenueBase Database · checked Sep 28, 2026
17	RIO Bravo Systems, INC	Indirect evidence	Englewood, CO, United StatesHQ checked Sep 28, 2026	51-200	114 contacts →
	Indirect evidence “Rio Bravo Systems is a privately-equity backed holding company dedicated to investing in Enterprise IT Services & Cybsecurity companies.” Source: RevenueBase Database · checked Sep 28, 2026
18	Kudu Dynamics LLC	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 28, 2026	51-200	113 contacts →
	Indirect evidence “Those who play with the devil's toys will be brought by degrees to wield his sword.~ R.” Source: RevenueBase Database · checked Sep 28, 2026
19	Adapt Forward	Partial evidence	North Charleston, SC, United StatesHQ checked Sep 28, 2026	51-200	113 contacts →
	Partial evidence “Adapt Forward helps government agencies outpace adversaries through proven Cybersecurity Service Provider (CSSP) operations, mission-focused innovation, and a people first culture…” Source: RevenueBase Database · checked Sep 28, 2026
20	Shorepoint INC	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	n/a	106 contacts →
	Partial evidence “ShorePoint recognizes that cybersecurity is the challenge of our generation.” Source: RevenueBase Database · checked Sep 28, 2026
21	Trustedsec	Indirect evidence	Fairlawn, OH, United StatesHQ checked Sep 28, 2026	51-200	102 contacts →
	Indirect evidence “TrustedSec is an end-to-end security consulting company that provides customized services to build client-defined success.” Source: RevenueBase Database · checked Sep 28, 2026
22	Foresite Cybersecurity	Indirect evidence	Overland Park, KS, United StatesHQ checked Sep 28, 2026	51-200	101 contacts →
	Indirect evidence “As the world becomes more connected, our lives and businesses are more vulnerable.” Source: RevenueBase Database · checked Sep 28, 2026
23	Drawbridge	Strong evidence	Palm Beach Gardens, FL, United StatesHQ checked Sep 28, 2026	51-200	100 contacts →
	Strong evidence “Drawbridge is a premier provider of cybersecurity software and solutions to the alternative investment and wealth management industry.” Source: RevenueBase Database · checked Sep 28, 2026
24	1force	Indirect evidence	Hilton Head Island, SC, United StatesHQ checked Sep 28, 2026	11-50	99 contacts →
	Indirect evidence “For more than 15 years, 1FORCE has been a steadfast supporter of dynamic and demanding programs within the federal sector, with a specific focus on National Security.” Source: RevenueBase Database · checked Sep 28, 2026
25	Defy Security	Partial evidence	Canonsburg, PA, United StatesHQ checked Sep 28, 2026	51-200	89 contacts →
	Partial evidence “Defy Security was founded in 2017 with one primary goal: to change the cybersecurity buying experience by delivering value and service that is unmatched.” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: cybersecurity investment firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names cybersecurity investment firms.
Partial evidence: Its own public description names part of cybersecurity investment firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity investment firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 1,045 cybersecurity investment firms based in the United States

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Cybersecurity investment firms based in the United States at a glance

As of Sep 28, 2026

34.2%Verified-email coverage

12.9Average contacts per company

1-10Median size (employees)

4.3%Largest-city concentration · New York

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

621

11-50

310

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,045 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 cybersecurity investment firms, 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 the United States whose own description of what they do matches “cybersecurity investment firms”. 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 cybersecurity investment firms), 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 cybersecurity investment firms, and records with no verified work email. Companies headquartered outside United States 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, 4,616 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 28, 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.

Cybersecurity investment firms by metro

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 cybersecurity investment firms, 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 cybersecurity investment firms are there based in the United States?

RevenueBase identified 1,045 cybersecurity investment firms headquartered in the 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?

Guidepoint Security, headquartered in Reston, tops this list with the largest team on record.

Which city has the most cybersecurity investment firms?

New York leads with 45 headquartered companies, followed by Austin (28) and San Francisco (28).

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 4,616 verified decision-maker contacts tracked across these 1,045 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 28, 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.