Company lists · Data refreshed September 2026

Top 25 Defense cybersecurity companies based in Singapore

Name: Defense cybersecurity companies based in Singapore
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 14, 2026 103 companies tracked

RevenueBase identified 103 defense cybersecurity companies headquartered in Singapore as of September 2026 and tracks 2,960 professional contacts across them, including 1,038 with verified work emails. Singapore is the largest hub.

This list covers defense cybersecurity companies headquartered in Singapore, 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 14, 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 14, 2026 86% judged on-target in blind review

103Companies

2,960Contacts tracked

1,038Verified emails

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The 25 largest defense cybersecurity companies based in Singapore

Ranked by team size

Top 25 of 103 defense cybersecurity companies based in Singapore, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to defense cybersecurity companies: 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	Ensign Infosecurity	Partial evidence	SingaporeHQ checked Sep 14, 2026	501-1,000	888 contacts →
	Partial evidence “Ensign InfoSecurity is the largest pure-play end-to-end cybersecurity service provider in Asia.” Source: RevenueBase Database · checked Sep 14, 2026
2	Group-Ib	Partial evidence	SingaporeHQ checked Sep 14, 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 14, 2026
3	Adventus	Partial evidence	SingaporeHQ checked Sep 14, 2026	201-500	279 contacts →
	Partial evidence “Leader in ICT & Cybersecurity Solutions & Services Adventus is a premier provider of Information and Communications Technology (ICT) and Cybersecurity solutions and services that…” Source: RevenueBase Database · checked Sep 14, 2026
4	Trend Micro Amea	Indirect evidence	SingaporeHQ checked Sep 14, 2026	5,001-10,000	150 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 14, 2026
5	Cyberteq	Partial evidence	Bishan, SingaporeHQ checked Sep 14, 2026	51-200	128 contacts →
	Partial evidence “CYBERTEQ is a Cybersecurity technology company with a clear mission to create value for clients by driving Digital and Cyber resilience.” Source: RevenueBase Database · checked Sep 14, 2026
6	Positka	Indirect evidence	SingaporeHQ checked Sep 14, 2026	51-200	67 contacts →
	Indirect evidence “Positka is dedicated to building a business that delivers value to customers by combining the strategic rigor and intellectual focus of high-end management consulting with the…” Source: RevenueBase Database · checked Sep 14, 2026
7	Cybersafe	Partial evidence	SingaporeHQ checked Sep 14, 2026	11-50	39 contacts →
	Partial evidence “Cybersecurity isn't only for the big boys anymore.” Source: RevenueBase Database · checked Sep 14, 2026
8	Dacta Global	Indirect evidence	SingaporeHQ checked Sep 14, 2026	11-50	38 contacts →
	Indirect evidence “DACTA was established with the aim of simplifying the perception of complexity surrounding digital security challenges and solutions.” Source: RevenueBase Database · checked Sep 14, 2026
9	TSI Tech	Indirect evidence	SingaporeHQ checked Sep 14, 2026	51-200	35 contacts →
	Indirect evidence “TSI is a leading solution provider for intelligent security solutions and mission-critical information systems.” Source: RevenueBase Database · checked Sep 14, 2026
10	Horangi Cyber Security	Partial evidence	SingaporeHQ checked Sep 14, 2026	51-200	33 contacts →
	Partial evidence “At Horangi, we’re passionate about building a safer cyberspace and creating software that solves challenging cybersecurity problems.” Source: RevenueBase Database · checked Sep 14, 2026
11	Vcyberiz	Indirect evidence	SingaporeHQ checked Sep 14, 2026	11-50	29 contacts →
	Indirect evidence “Quantified Risk, Fortified Resilience.” Source: RevenueBase Database · checked Sep 14, 2026
12	Argentra Solutions	Indirect evidence	SingaporeHQ checked Sep 14, 2026	11-50	29 contacts →
	Indirect evidence “At Argentra, we believe providing quality IT security solutions begins with listening to the unique needs of each client.” Source: RevenueBase Database · checked Sep 14, 2026
13	ABP Cyber	Partial evidence	SingaporeHQ checked Sep 14, 2026	51-200	27 contacts →
	Partial evidence “ABP Cyber offers holistic cybersecurity solutions spanning DevSecOps, advisory and consultancy, designing and integration, managed operations, and cybersecurity investment…” Source: RevenueBase Database · checked Sep 14, 2026
14	ABP Group	Partial evidence	SingaporeHQ checked Sep 14, 2026	201-500	24 contacts →
	Partial evidence “ABP Group is Asia’s leading Cybersecurity technology provider focusing on delivering the best-of-breed security solutions for today’s cybersecurity challenges.” Source: RevenueBase Database · checked Sep 14, 2026
15	Security Spectrum Services LLP	Partial evidence	SingaporeHQ checked Sep 14, 2026	51-200	22 contacts →
	Partial evidence “Cybersecurity is the enabler of business We are a team of cyber security connoisseurs and problem solvers (with good current working experience in IT infrastructure) who have…” Source: RevenueBase Database · checked Sep 14, 2026
16	Custodio-Technologies	Strong evidence	SingaporeHQ checked Sep 14, 2026	11-50	17 contacts →
	Strong evidence “Custodio Technologies is a Singapore-based cybersecurity company rooted in applied R&D, delivering innovative solutions in cyber defence worldwide, including advanced threat…” Source: RevenueBase Database · checked Sep 14, 2026
17	Stone Cybersecurity	Partial evidence	SingaporeHQ checked Sep 14, 2026	11-50	15 contacts →
	Partial evidence “Stone Cybersecurity is a security firm that has seen rapid growth since the day it opened its doors.” Source: RevenueBase Database · checked Sep 14, 2026
18	Momentum Z	Partial evidence	SingaporeHQ checked Sep 14, 2026	1-10	14 contacts →
	Partial evidence “Momentum Z is your cybersecurity partner for SMB, SME, MNC, and government.” Source: RevenueBase Database · checked Sep 14, 2026
19	Privacy Ninja	Indirect evidence	SingaporeHQ checked Sep 14, 2026	11-50	14 contacts →
	Indirect evidence “It is our mission to give all organizations in Singapore a fair chance to grow via quick and affordable solutions.” Source: RevenueBase Database · checked Sep 14, 2026
20	Hawkshield	Partial evidence	Raffles Place, SingaporeHQ checked Sep 14, 2026	51-200	13 contacts →
	Partial evidence “Hawkshield \| Your Trusted Cybersecurity Partner At Hawkshield, we specialize in advanced cybersecurity solutions designed to protect your organization in a digital-first world.” Source: RevenueBase Database · checked Sep 14, 2026
21	Atet Security	Indirect evidence	Kallang, SingaporeHQ checked Sep 14, 2026	1-10	11 contacts →
	Indirect evidence “The first step to build a successful venture is to create a secure and well- sought after presence in your niche.” Source: RevenueBase Database · checked Sep 14, 2026
22	GND Cyber	Indirect evidence	SingaporeHQ checked Sep 14, 2026	1-10	10 contacts →
	Indirect evidence “As cyber security solutions provider, our goal is to help organizations in protecting their data, preserving the integrity of data and promoting the availability of data for…” Source: RevenueBase Database · checked Sep 14, 2026
23	Bizsecure Apac	Indirect evidence	SingaporeHQ checked Sep 14, 2026	11-50	10 contacts →
	Indirect evidence “Bizsecure Asia Pacific, is a company that is specialize in cyber security.” Source: RevenueBase Database · checked Sep 14, 2026
24	Ace6 Technology	Indirect evidence	SingaporeHQ checked Sep 14, 2026	11-50	10 contacts →
	Indirect evidence “ACE6 Technology pioneers technological solutions for surveillance and communication needs across diverse industries.” Source: RevenueBase Database · checked Sep 14, 2026
25	Defensys	Strong evidence	SingaporeHQ checked Sep 14, 2026	51-200	10 contacts →
	Strong evidence “Defensys is a cybersecurity solutions vendor.” Source: RevenueBase Database · checked Sep 14, 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: defense cybersecurity companies. 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 defense cybersecurity companies.
Partial evidence: Its own public description names part of defense cybersecurity companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name defense cybersecurity companies. 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 103 defense cybersecurity companies based in Singapore

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Defense cybersecurity companies based in Singapore at a glance

As of Sep 14, 2026

35.1%Verified-email coverage

28.7Average contacts per company

11-50Median size (employees)

87.4%Largest-city concentration · Singapore

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

5,001-10,000

Email recency for this list is measured worldwide rather than for Singapore, so it is reported there. Company counts and contact totals on this page are exact for Singapore, over 103 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 defense cybersecurity companies, 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 Singapore whose own description of what they do matches “defense cybersecurity companies”. 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 defense cybersecurity companies), 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 defense cybersecurity companies, and records with no verified work email. Companies headquartered outside Singapore 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, 1,038 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 14, 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.

Defense cybersecurity companies by metro

Defense cybersecurity companies in Singapore90

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 defense cybersecurity companies, 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 defense cybersecurity companies are there based in Singapore?

RevenueBase identified 103 defense cybersecurity companies headquartered in Singapore 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?

Ensign Infosecurity, headquartered in Singapore, tops this list with the largest team on record.

Which city has the most defense cybersecurity companies?

Singapore leads with 90 headquartered companies, followed by Csc (1) and Downtown Core (1).

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 1,038 verified decision-maker contacts tracked across these 103 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 14, 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.