Company lists · Data refreshed September 2026

Top 25 Cybersecurity software developers based in the United States

Name: Cybersecurity software developers 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 715 companies tracked

RevenueBase identified 715 company matches for cybersecurity software developers associated with the United States as of September 2026 and tracks 55,362 professional contacts across them, including 24,820 with verified work emails. New York is the largest hub.

This list covers company matches for cybersecurity software developers associated with the 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 28, 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 28, 2026 How this list was built

715Companies

55,362Contacts tracked

24,820Verified emails

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The 25 largest cybersecurity software developers based in the United States

Ranked by team size

Top 25 of 715 company matches for cybersecurity software developers based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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	Palo Alto Networks	Exact match	Santa Clara, CA, United StatesHQ recorded Sep 28, 2026	10001+	18,431 contacts →
	Exact match “Palo Alto Networks, the global cybersecurity leader, is shaping the cloud-centric future with technology that is transforming the way people and organizations operate.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Fortinet	Exact match	Sunnyvale, CA, United StatesHQ recorded Sep 28, 2026	10001+	14,289 contacts →
	Exact match “Fortinet makes possible a digital world that we can always trust through its mission to protect people, devices, and data everywhere.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	Symantec	Exact match	San Jose, CA, United StatesHQ recorded Sep 28, 2026	10001+	11,169 contacts →
	Exact match “Your backstage pass to the most epic cybersecurity solutions on the market for Endpoint, Network, Data and Cloud security.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	Malwarebytes	Exact match	Santa Clara, CA, United StatesHQ recorded Sep 28, 2026	501-1,000	604 contacts →
	Exact match “Malwarebytes is reimagining security to safeguard devices, data, and people, no matter their location, lifestyle or means.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	Guidance Software	Exact match	Pasadena, CA, United StatesHQ recorded Sep 28, 2026	501-1,000	492 contacts →
	Exact match “Guidance (NASDAQ: GUID) exists to turn chaos and the unknown into order and the known-so that companies and their customers can go about their daily lives as usual without worry…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	Novacoast	Exact match	Wichita, KS, United StatesHQ recorded Sep 28, 2026	201-500	369 contacts →
	Exact match “Novacoast is an international cybersecurity company specializing in IT services and software development.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	horizon3.ai	Exact match	San Francisco, CA, United StatesHQ recorded Sep 28, 2026	201-500	364 contacts →
	Exact match “Horizon3.ai answers the two most important questions in cybersecurity: If someone tried to compromise us, would we hold up?” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	Reversinglabs	Exact match	Cambridge, MA, United StatesHQ recorded Sep 28, 2026	201-500	340 contacts →
	Exact match “ReversingLabs is the trusted name in file and software security.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	ONTIC	Exact match	Austin, TX, United StatesHQ recorded Sep 28, 2026	201-500	317 contacts →
	Exact match “At Ontic, you’ll join a team driven by collaboration, innovation, and a shared sense of purpose.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	Millennium Corporation	Exact match	Arlington, VA, United StatesHQ recorded Sep 28, 2026	201-500	265 contacts →
	Exact match “For nearly two decades, Millennium Corporation has been operating on the leading edge of cybersecurity.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Loginsoft	Exact match	Chantilly, VA, United StatesHQ recorded Sep 28, 2026	201-500	220 contacts →
	Exact match “For over 20 years, leading companies in Telecom, Cybersecurity, Healthcare, Banking, New Media, and more have come to rely on Loginsoft as a trusted resource for technology talent.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	Webroot	Exact match	Broomfield, CO, United StatesHQ recorded Sep 28, 2026	501-1,000	199 contacts →
	Exact match “Webroot, an OpenText company, was the first to harness the cloud and artificial intelligence to stop zero-day threats in real time.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	Eset North America	Exact match	San Diego, CA, United StatesHQ recorded Sep 28, 2026	51-200	180 contacts →
	Exact match “For more than 30 years we have been here helping to watch over and protect progress.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Assured Information Security AIS	Exact match	Rome, NY, United StatesHQ recorded Sep 28, 2026	201-500	173 contacts →
	Exact match “Our roots trace directly to cyber and information security and our well documented contributions are proof.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	Stratascale	Exact match	Charlotte, NC, United StatesHQ recorded Sep 28, 2026	201-500	171 contacts →
	Exact match “Stratascale is a premier services company proudly operating as the cybersecurity division of SHI.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	Fidelis Security	Exact match	Riverside, CA, United StatesHQ recorded Sep 28, 2026	51-200	147 contacts →
	Exact match “Fidelis Security® is the industry innovator in proactive cyber defense, safeguarding modern IT for global enterprises with proactive XDR and CNAPP platforms.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	Ishpi Information Technologies, Inc. Ishpi	Exact match	Suffolk, VA, United StatesHQ recorded Sep 28, 2026	201-500	127 contacts →
	Exact match “ISHPI works in concert with other defenders of the Homeland to fortify national preparedness, agility, strength and advantage in the cyber domain – a readiness state we refer to…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Sealing Technologies, A Parsons Company	Exact match	Columbia, MD, United StatesHQ recorded Sep 28, 2026	51-200	119 contacts →
	Exact match “SealingTech, a Parsons Company, rapidly delivers innovative, agile cybersecurity solutions that modernize, protect, and defend the networks and systems of the federal government…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	Kudu Dynamics LLC	Exact match	Chantilly, VA, United StatesHQ recorded Sep 28, 2026	51-200	113 contacts →
	Exact match “Those who play with the devil's toys will be brought by degrees to wield his sword.~ R.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Adapt Forward	Exact match	North Charleston, SC, United StatesHQ recorded Sep 28, 2026	51-200	113 contacts →
	Exact match “Adapt Forward helps government agencies outpace adversaries through proven Cybersecurity Service Provider (CSSP) operations, mission-focused innovation, and a people first culture…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	Shorepoint INC	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	n/a	106 contacts →
	Exact match “ShorePoint recognizes that cybersecurity is the challenge of our generation.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	Foresite Cybersecurity	Exact match	Overland Park, KS, United StatesHQ recorded Sep 28, 2026	51-200	101 contacts →
	Exact match “As the world becomes more connected, our lives and businesses are more vulnerable.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	Drawbridge	Exact match	Palm Beach Gardens, FL, United StatesHQ recorded Sep 28, 2026	51-200	100 contacts →
	Exact match “Drawbridge is a premier provider of cybersecurity software and solutions to the alternative investment and wealth management industry.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	Hunter Strategy	Exact match	Pompano Beach, DC, United StatesHQ recorded Sep 28, 2026	51-200	100 contacts →
	Exact match “Cybersecurity and software engineering SMEs that help Government and Commercial customers build secure scalable solutions.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	Defy Security	Exact match	Canonsburg, PA, United StatesHQ recorded Sep 28, 2026	51-200	89 contacts →
	Exact match “Defy Security was founded in 2017 with one primary goal: to change the cybersecurity buying experience by delivering value and service that is unmatched.” Recorded in the RevenueBase company graph · Sep 28, 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 software developers”. 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 25 of 715 cybersecurity software developers based in the United States

See the full list, filter by size, metro and specialty, and access 24,820 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Cybersecurity software developers based in the United States at a glance

As of Sep 28, 2026

44.8%Verified-email coverage

77.4Average contacts per company

11-50Median size (employees)

2.9%Largest-city concentration · New York

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

348

11-50

239

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 715 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 the United States whose business descriptions match “cybersecurity software developers” 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 24,820 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 28, 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.

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 software developers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cybersecurity software developers are there based in the United States?

RevenueBase identified 715 company matches for cybersecurity software developers associated with the 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?

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

Which city has the most cybersecurity software developers?

New York leads with 21 company records, followed by San Francisco (18) and Washington (17).

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 24,820 professional contacts with verified work emails tracked across these 715 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 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 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.