Company lists · Data refreshed September 2026

Top 25 Cybersecurity software developers worldwide

Name: Cybersecurity software developers worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 3,537 companies tracked

RevenueBase identified 3,537 cybersecurity software developers worldwide as of September 2026 and tracks 108,739 professional contacts across them, including 41,216 with verified work emails. The United States is the largest market and London the largest hub.

This list covers cybersecurity software developers worldwide, 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. Country and city lists for cybersecurity software developers follow the table.

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

3,537Companies

108,739Contacts tracked

41,216Verified emails

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The 25 largest cybersecurity software developers worldwide

Ranked by team size

Top 25 of 3,537 cybersecurity software developers worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity software developers: 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	Palo Alto Networks	Partial evidence	Santa Clara, CA, United StatesHQ checked Sep 28, 2026	10001+	18,431 contacts →
	Partial evidence “Palo Alto Networks, the global cybersecurity leader, is shaping the cloud-centric future with technology that is transforming the way people and organizations operate.” Source: RevenueBase Database · checked Sep 28, 2026
2	Fortinet	Indirect evidence	Sunnyvale, CA, United StatesHQ checked Sep 28, 2026	10001+	14,289 contacts →
	Indirect evidence “Fortinet makes possible a digital world that we can always trust through its mission to protect people, devices, and data everywhere.” Source: RevenueBase Database · checked Sep 28, 2026
3	Symantec	Partial evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	10001+	11,169 contacts →
	Partial evidence “Your backstage pass to the most epic cybersecurity solutions on the market for Endpoint, Network, Data and Cloud security.” Source: RevenueBase Database · checked Sep 28, 2026
4	Trend Micro	Partial evidence	Yoyogi, JapanHQ checked Sep 28, 2026	5,001-10,000	4,942 contacts →
	Partial evidence “We’re a global cybersecurity leader, helping to make the world safe for exchanging digital information.” Source: RevenueBase Database · checked Sep 28, 2026
5	Sophos	Partial evidence	Abingdon, United KingdomHQ checked Sep 28, 2026	5,001-10,000	4,925 contacts →
	Partial evidence “Sophos is a cybersecurity leader defending organizations globally with an AI-driven platform and expert-led services.” Source: RevenueBase Database · checked Sep 28, 2026
6	Bitdefender	Partial evidence	Bucuresti, RomaniaHQ checked Sep 28, 2026	1,001-5,000	2,172 contacts →
	Partial evidence “Bitdefender is a cybersecurity leader delivering best-in-class threat prevention, detection, and response solutions worldwide.” Source: RevenueBase Database · checked Sep 28, 2026
7	ESET	Indirect evidence	Bratislava, SlovakiaHQ checked Sep 28, 2026	1,001-5,000	1,719 contacts →
	Indirect evidence “When technology enables progress, ESET is here to protect it.” Source: RevenueBase Database · checked Sep 28, 2026
8	Quick Heal	Indirect evidence	Pune, IndiaHQ checked Sep 28, 2026	1,001-5,000	1,510 contacts →
	Indirect evidence “Quick Heal Technologies Limited is one of the leading providers of IT Security and Data Protection Solutions with a strong footprint in India and an evolving global presence.” Source: RevenueBase Database · checked Sep 28, 2026
9	Irdeto	Partial evidence	Hoofddorp, NetherlandsHQ checked Sep 28, 2026	1,001-5,000	1,026 contacts →
	Partial evidence “Irdeto, a CANAL+ company, is the world leader in digital platform cybersecurity, empowering businesses to innovate for a secure, connected future.” Source: RevenueBase Database · checked Sep 28, 2026
10	SISA	Partial evidence	Bengaluru, IndiaHQ checked Sep 28, 2026	201-500	743 contacts →
	Partial evidence “SISA is a global forensics-driven cybersecurity solutions company, trusted by leading organizations for securing their businesses with robust preventive, detective, and corrective…” Source: RevenueBase Database · checked Sep 28, 2026
11	Positive Technologies	Strong evidence	United StatesHQ checked Sep 28, 2026	1,001-5,000	686 contacts →
	Strong evidence “Positive Technologies is a leading developer of products, solutions and services for results-driven cybersecurity that enable detection and prevention of attacks before they cause…” Source: RevenueBase Database · checked Sep 28, 2026
12	Everfox	Indirect evidence	Herndon, United StatesHQ checked Sep 28, 2026	1,001-5,000	636 contacts →
	Indirect evidence “Everfox delivers trusted connectivity to protect the world's most critical environments, safeguarding the sensitive information behind decision advantage.” Source: RevenueBase Database · checked Sep 28, 2026
13	Malwarebytes	Indirect evidence	Santa Clara, CA, United StatesHQ checked Sep 28, 2026	501-1,000	604 contacts →
	Indirect evidence “Malwarebytes is reimagining security to safeguard devices, data, and people, no matter their location, lifestyle or means.” Source: RevenueBase Database · checked Sep 28, 2026
14	SSH Communications Security	Partial evidence	Helsinki, FinlandHQ checked Sep 28, 2026	51-200	593 contacts →
	Partial evidence “We are a European cybersecurity company that helps businesses secure critical data and communications between systems, automated applications, and people with defensive…” Source: RevenueBase Database · checked Sep 28, 2026
15	Advens	Partial evidence	Paris, ItalyHQ checked Sep 28, 2026	501-1,000	586 contacts →
	Partial evidence “Advens is a European, independent and outstanding leader in cybersecurity.” Source: RevenueBase Database · checked Sep 28, 2026
16	Ahnlab, INC	Partial evidence	Seongnam-si, South KoreaHQ checked Sep 28, 2026	1,001-5,000	581 contacts →
	Partial evidence “Founded in 1995, AhnLab, Inc, the global cybersecurity company, delivers comprehensive protection for endpoints, networks, transactions, and essential services.” Source: RevenueBase Database · checked Sep 28, 2026
17	Group-Ib	Partial evidence	SingaporeHQ checked Sep 28, 2026	501-1,000	528 contacts →
	Partial evidence “Founded in 2003 and headquartered in Singapore, Group-IB is a leading creator of cybersecurity technologies to investigate, prevent, and fight digital crime.” Source: RevenueBase Database · checked Sep 28, 2026
18	Securityhq	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	502 contacts →
	Partial evidence “SecurityHQ, a global cybersecurity company pioneering Security Performance Engineering for stronger operational performance and resilience.” Source: RevenueBase Database · checked Sep 28, 2026
19	Guidance Software	Indirect evidence	Pasadena, CA, United StatesHQ checked Sep 28, 2026	501-1,000	492 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
20	G Data Cyberdefense	Indirect evidence	Bochum, GermanyHQ checked Sep 28, 2026	501-1,000	386 contacts →
	Indirect evidence “Progress is our motivation because we are convinced that it will lead us to a successful future – independent of industries, companies and social classes.” Source: RevenueBase Database · checked Sep 28, 2026
21	Novacoast	Strong evidence	Wichita, KS, United StatesHQ checked Sep 28, 2026	201-500	369 contacts →
	Strong evidence “Novacoast is an international cybersecurity company specializing in IT services and software development.” Source: RevenueBase Database · checked Sep 28, 2026
22	horizon3.ai	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	201-500	364 contacts →
	Partial evidence “Horizon3.ai answers the two most important questions in cybersecurity: If someone tried to compromise us, would we hold up?” Source: RevenueBase Database · checked Sep 28, 2026
23	K7 Computing	Indirect evidence	Chennai, IndiaHQ checked Sep 28, 2026	201-500	362 contacts →
	Indirect evidence “K7 Computing is a global cyber security pioneer with over 30 year’s expertise in the cyber security industry.” Source: RevenueBase Database · checked Sep 28, 2026
24	Reversinglabs	Partial evidence	Cambridge, MA, United StatesHQ checked Sep 28, 2026	201-500	340 contacts →
	Partial evidence “ReversingLabs is the trusted name in file and software security.” Source: RevenueBase Database · checked Sep 28, 2026
25	ONTIC	Indirect evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	201-500	317 contacts →
	Indirect evidence “At Ontic, you’ll join a team driven by collaboration, innovation, and a shared sense of purpose.” 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 software developers. 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 software developers.
Partial evidence: Its own public description names part of cybersecurity software developers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity software developers. 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 3,537 cybersecurity software developers worldwide

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Cybersecurity software developers worldwide at a glance

As of Sep 28, 2026

37.9%Verified-email coverage

30.7Average contacts per company

1-10Median size (employees)

1.9%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

1,769

11-50

1,239

51-200

351

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 software developers, 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.
Coverage: Every country. Country and city lists for cybersecurity software developers are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “cybersecurity software developers”. 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 software developers), 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 software developers, and records with no verified work email.
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, 41,216 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 software developers by location

22 lists · largest first

Every Cybersecurity software developers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 software developers, 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 software developers are there worldwide?

RevenueBase identified 3,537 cybersecurity software developers worldwide 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?

Palo Alto Networks, headquartered in Santa Clara, tops this list with the largest team on record.

Which country has the most cybersecurity software developers?

The United States leads with 715 companies, followed by India (361) and the United Kingdom (164). Every cybersecurity software developers list by country and city is linked on this page.

Which city has the most cybersecurity software developers?

London leads with 67 headquartered companies, followed by Dubai (38) and Paris (35).

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 41,216 verified decision-maker contacts tracked across these 3,537 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.