Company lists · Data refreshed September 2026

Top 25 Defence cybersecurity companies based in Toronto, Canada

Name: Defence cybersecurity companies based in Toronto, Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 95 companies tracked

RevenueBase identified 95 defence cybersecurity companies headquartered in Toronto, Canada as of September 2026 and tracks 748 professional contacts across them, including 252 with verified work emails. Toronto is the largest hub.

This list covers defence cybersecurity companies headquartered in Toronto, Canada, 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 21, 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 21, 2026 86% judged on-target in blind review

95Companies

748Contacts tracked

252Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest defence cybersecurity companies based in Toronto, Canada

Ranked by team size

Top 25 of 95 defence cybersecurity companies based in Toronto, Canada, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to defence 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	Trillium Information Security Systems	Partial evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	51-200	239 contacts →
	Partial evidence “Trillium Information Security Systems (TISS) is a leading global provider of cybersecurity solutions and services, established in 2005.” Source: RevenueBase Database · checked Sep 21, 2026
2	ISA Cybersecurity	Partial evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	51-200	86 contacts →
	Partial evidence “ISA Cybersecurity is one of Canada’s leading cybersecurity services and solutions providers.” Source: RevenueBase Database · checked Sep 21, 2026
3	Cybersecurity Umbrella	Partial evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	51-200	54 contacts →
	Partial evidence “Cybersecurity Umbrella Corp delivers AI-driven cybersecurity solutions tailored for fintech, enterprises, governments, educators, and digital platforms.” Source: RevenueBase Database · checked Sep 21, 2026
4	Cruciallogics	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	51-200	48 contacts →
	Indirect evidence “We help organizations secure and manage their IT environments using the Microsoft-native technologies they already own.” Source: RevenueBase Database · checked Sep 21, 2026
5	Armour Cybersecurity	Partial evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	11-50	20 contacts →
	Partial evidence “Armour Cybersecurity protects organizations from the multi-faceted, ever-evolving cyber threats that put businesses at risk every day.” Source: RevenueBase Database · checked Sep 21, 2026
6	Mjolnir Security INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	11-50	17 contacts →
	Indirect evidence “Mjolnir provides clients with a suite of highly advanced and AI/ML driven tools and services - Security Ops Center as a Service, Threat Detection and Dark web Threat Intelligence…” Source: RevenueBase Database · checked Sep 21, 2026
7	Heighten Security	Partial evidence	Toronto, CanadaHQ checked Sep 21, 2026	1-10	16 contacts →
	Partial evidence “Heighten Security is a leading provider of cybersecurity services for organizations across Canada.” Source: RevenueBase Database · checked Sep 21, 2026
8	Ardent Security	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	1-10	8 contacts →
	Indirect evidence “At Ardent Security, we've built our reputation on a simple principle: Exceptional credentials deliver exceptional results.” Source: RevenueBase Database · checked Sep 21, 2026
9	Advisorsden	Partial evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	11-50	6 contacts →
	Partial evidence “Your Partner in Cybersecurity Excellence At Advisorsden, we understand that the digital landscape is evolving rapidly, and with it, the complexity and sophistication of…” Source: RevenueBase Database · checked Sep 21, 2026
10	Cybersteward	Partial evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	11-50	6 contacts →
	Partial evidence “CyberSteward™ is a global, market-leading Cybersecurity Advisory firm, headquartered in Toronto, Ontario, Canada, with technical expertise in cybersecurity breaches and…” Source: RevenueBase Database · checked Sep 21, 2026
11	Thinklink	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	11-50	6 contacts →
	Indirect evidence “ThinkLink secures enterprises against cyber risks by helping them reduce & manage their attack surface.” Source: RevenueBase Database · checked Sep 21, 2026
12	Velnet Consulting	Partial evidence	Toronto, CanadaHQ checked Sep 21, 2026	11-50	5 contacts →
	Partial evidence “Empowering organizations to navigate modern cybersecurity challenges with confidence.” Source: RevenueBase Database · checked Sep 21, 2026
13	Deepcove Cybersecurity	Partial evidence	Toronto, CanadaHQ checked Sep 21, 2026	1-10	4 contacts →
	Partial evidence “DeepCove delivers cybersecurity using automation and artificial intelligence powered services while preserving client privacy.” Source: RevenueBase Database · checked Sep 21, 2026
14	Allo Technologies	Partial evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	11-50	3 contacts →
	Partial evidence “We specialize in information security program design, implementation, and managed cybersecurity services.” Source: RevenueBase Database · checked Sep 21, 2026
15	Kernel Advisory	Partial evidence	Toronto, CanadaHQ checked Sep 21, 2026	11-50	3 contacts →
	Partial evidence “Kernel is trusted by companies and investors around the world with complex cybersecurity needs.” Source: RevenueBase Database · checked Sep 21, 2026
16	Bitsproof	Partial evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	11-50	3 contacts →
	Partial evidence “We are a cybersecurity company that provides solutions and services to help organizations improve their security posture.” Source: RevenueBase Database · checked Sep 21, 2026
17	Malto Cyber	Partial evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	1-10	3 contacts →
	Partial evidence “MALTO Cyber is a cybersecurity company dedicated to helping organizations protect their critical information and information systems from evolving cyber threats.” Source: RevenueBase Database · checked Sep 21, 2026
18	BM Network Solutions	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	1-10	3 contacts →
	Indirect evidence “We Protect Your Business!” Source: RevenueBase Database · checked Sep 21, 2026
19	Altoverra	Partial evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	11-50	2 contacts →
	Partial evidence “Altoverra is an IT Security company assisting small and medium sized organizations with their Cybersecurity needs.” Source: RevenueBase Database · checked Sep 21, 2026
20	Secur-It Data Solutions	Partial evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	1-10	2 contacts →
	Partial evidence “Founded in 2023 by two seasoned industry leaders with over 40 years of global IT and cybersecurity expertise, Secur-IT Data Solutions was built to tackle the toughest digital…” Source: RevenueBase Database · checked Sep 21, 2026
21	Informa Solutions Canada	Strong evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	1-10	2 contacts →
	Strong evidence “A leading provider of comprehensive Information Technology and Cybersecurity solutions to protect organizations from evolving digital threats with a passion for defending the…” Source: RevenueBase Database · checked Sep 21, 2026
22	Interlan Consulting INC	Partial evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	1-10	2 contacts →
	Partial evidence “InterLAN completed hundreds of cybersecurity and network infrastructure engagements with well over one hundred organizations in Canada and the US.” Source: RevenueBase Database · checked Sep 21, 2026
23	Akouto	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	1-10	2 contacts →
	Indirect evidence “Akouto is a consulting firm in Toronto, Ontario providing business Cyber Security solutions.” Source: RevenueBase Database · checked Sep 21, 2026
24	Ccurity	Indirect evidence	Toronto, CanadaHQ checked Sep 21, 2026	11-50	1 contacts →
	Indirect evidence “We are a boutique cyber security consulting and services firm whose focus is providing Security Research, Product Development, Security Management and Security Operations to…” Source: RevenueBase Database · checked Sep 21, 2026
25	Edrivium Corporation	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	1-10	1 contacts →
	Indirect evidence “From coast-to-coast, mid-sized Canadian enterprises depend on eDrivium to protect them from ever-evolving cyber security threats.” Source: RevenueBase Database · checked Sep 21, 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: defence 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 defence cybersecurity companies.
Partial evidence: Its own public description names part of defence cybersecurity companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name defence 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 95 defence cybersecurity companies based in Toronto, Canada

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 252 reachable decision-makers.

Free signup · no credit card

View the full list →

Defence cybersecurity companies based in Toronto, Canada at a glance

As of Sep 21, 2026

33.7%Verified-email coverage

7.9Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · Toronto

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured across the whole Canada list rather than for Toronto, so it is reported there. Company counts and contact totals on this page are exact for Toronto, over 95 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 defence 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 Toronto, Canada whose own description of what they do matches “defence 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 defence 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 defence cybersecurity companies, and records with no verified work email. Companies headquartered outside Toronto 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, 252 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 21, 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.

Defence cybersecurity companies by metro in Canada

Defence cybersecurity companies in Toronto95
Defence cybersecurity companies in Montreal64
Defence cybersecurity companies in Ottawa44
Defence cybersecurity companies in Calgary35
Defence cybersecurity companies in Vancouver31

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 defence 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 defence cybersecurity companies are there based in Toronto, Canada?

RevenueBase identified 95 defence cybersecurity companies headquartered in Toronto, Canada 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?

Trillium Information Security Systems, headquartered in Toronto, tops this list with the largest team on record.

Which city has the most defence cybersecurity companies?

Toronto leads with 95 headquartered companies, followed by Montreal (64) and Ottawa (44).

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 252 verified decision-maker contacts tracked across these 95 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 21, 2026.

Ready to reach these companies? Verified emails and direct dials for all 95 defence cybersecurity companies based in Toronto, Canada. Start with a free account, no credit card.

Download this list →

Related lists

Defence cybersecurity companies by geography

Browse the directory

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.