Company lists · Data refreshed September 2026

Top 25 Managed security service providers based in Toronto, Canada

Name: Managed security service providers based in Toronto, Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 174 companies tracked

RevenueBase identified 174 managed security service providers headquartered in Toronto, Canada as of September 2026 and tracks 1,292 professional contacts across them, including 441 with verified work emails. Toronto is the largest hub.

This list covers managed security service providers 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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 HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

174Companies

1,292Contacts tracked

441Verified emails

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The 25 largest managed security service providers based in Toronto, Canada

Ranked by team size

Top 25 of 174 managed security service providers based in Toronto, Canada, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names managed security service providers: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Trillium Information Security SystemsPartial evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	51-200	239
	“Trillium Information Security Systems (TISS) is a leading global provider of cybersecurity solutions and services, established in 2005.” Source: company website · checked Sep 5, 2026
2	ISA CybersecurityIndirect evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	51-200	86
	“ISA Cybersecurity is one of Canada’s leading cybersecurity services and solutions providers.” Source: company website · checked Sep 5, 2026
3	Cybersecurity UmbrellaIndirect evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	51-200	54
	“Cybersecurity Umbrella Corp delivers AI-driven cybersecurity solutions tailored for fintech, enterprises, governments, educators, and digital platforms.” Source: company website · checked Sep 5, 2026
4	CruciallogicsPartial evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	51-200	48
	“We help organizations secure and manage their IT environments using the Microsoft-native technologies they already own.” Source: company website · checked Sep 5, 2026
5	CyderesStrong evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	501-1,000	37
	“Cyderes is a global cybersecurity powerhouse offering comprehensive solutions around managed security, identity and access management, and professional services.” Source: company website · checked Sep 5, 2026
6	ElastifyPartial evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	11-50	34
	“As your business grows, keeping up with compliance requirements and strengthening your security posture can be a real challenge.” Source: company website · checked Sep 5, 2026
7	Hudson TechnologyPartial evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	51-200	31
	“Hudson Technology is a Managed IT Services and Cybersecurity provider (MSP/MSSP) helping businesses across Canada and the U.S.” Source: company website · checked Sep 5, 2026
8	Tuor NetworksPartial evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	11-50	27
	“Tuor Networks provides comprehensive end-to-end Managed IT Services to support our clients’ business strategies and future growth plans and help solve even their most complex…” Source: company website · checked Sep 5, 2026
9	Airgate Technologies INCPartial evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	11-50	21
	“AirGate is a Premier Managed Services Provider of Secure Network and Cloud Services for Enterprise.” Source: company website · checked Sep 5, 2026
10	Armour CybersecurityIndirect evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	11-50	20
	“Armour Cybersecurity protects organizations from the multi-faceted, ever-evolving cyber threats that put businesses at risk every day.” Source: company website · checked Sep 5, 2026
11	IntercastIndirect evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	11-50	20
	“Intercast's mission is to be a strategic resource to our clients in Risk Reduction.” Source: company website · checked Sep 5, 2026
12	APIIStrong evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	11-50	19
	“apii is security focused IT Managed Services Headquartered in Toronto.” Source: company website · checked Sep 5, 2026
13	Optimus Tech Solutions INCPartial evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	11-50	18
	“Optimus Tech Solutions is a Toronto-based Managed IT and Cybersecurity Services provider helping organizations operate securely, efficiently, and with confidence.” Source: company website · checked Sep 5, 2026
14	Mjolnir Security INCPartial evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	11-50	17
	“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: company website · checked Sep 5, 2026
15	Connectability IT SupportPartial evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	11-50	17
	“Connectability has been a trusted partner for businesses in Toronto & GTA for over 30 years, providing expert managed IT services that keep your technology running smoothly and…” Source: company website · checked Sep 5, 2026
16	Heighten SecurityPartial evidence	Toronto, CanadaHQ checked Sep 5, 2026	1-10	16
	“Heighten Security is a leading provider of cybersecurity services for organizations across Canada.” Source: company website · checked Sep 5, 2026
17	CyberwallIndirect evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	11-50	16
	“Cyberwall is one of the best cybersecurity services and training provider in Toronto.” Source: company website · checked Sep 5, 2026
18	Group 4 NetworksPartial evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	1-10	11
	“Group 4 Networks is Toronto's trusted managed IT services and cybersecurity partner for small and mid-sized businesses.” Source: company website · checked Sep 5, 2026
19	Wolff Adar IT SolutionsIndirect evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	1-10	10
	“At Wolff Adar IT Solutions, we understand that your IT needs are unique.” Source: company website · checked Sep 5, 2026
20	Kirsch GroupIndirect evidence	Toronto, CanadaHQ checked Sep 5, 2026	1-10	9
	“We protect what’s important to you.” Source: company website · checked Sep 5, 2026
21	Shield IdentityIndirect evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	11-50	9
	“Shield Identity is a Brampton-based Cybersecurity, MSP, MSSP, and ERP company supporting small to medium-sized businesses across Brampton, Toronto, and the GTA.” Source: company website · checked Sep 5, 2026
22	SourcetekitStrong evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	11-50	8
	“SourcetekIT is focused on providing high-quality Professional and Managed Security Services to businesses across North America.” Source: company website · checked Sep 5, 2026
23	Ardent SecurityPartial evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	1-10	8
	“At Ardent Security, we've built our reputation on a simple principle: Exceptional credentials deliver exceptional results.” Source: company website · checked Sep 5, 2026
24	Beyond GTA INCIndirect evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	51-200	8
	“In 2007, our parent company, Beyond Co,Ltd.” Source: company website · checked Sep 5, 2026
25	StingraiIndirect evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	1-10	7
	“Stingrai is CREST-accredited for penetration testing services, helps companies prevent breaches by simulating real-world attacks.” Source: company website · checked Sep 5, 2026

Showing 25 of 174 managed security service providers based in Toronto, Canada

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Managed security service providers based in Toronto, Canada at a glance

As of Sep 5, 2026

1-10Median size (employees)

TorontoLargest hub · 174 HQs

Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

Email recency for this list is measured across the whole Canada list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Toronto, over 174 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 managed security service providers, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “managed security service providers”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among managed security service providers, 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 an evidence 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, 441 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 5, 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.

Managed security service providers by metro in Canada

Managed security service providers in Toronto174
Managed security service providers in Montreal97
Managed security service providers in Calgary66
Managed security service providers in Ottawa59
Managed security service providers in Vancouver45
Managed security service providers in Mississauga30
Managed security service providers in Edmonton25

Frequently asked

How many managed security service providers are there based in Toronto, Canada?

RevenueBase identified 174 managed security service providers 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 managed security service providers?

Toronto leads with 174 headquartered companies, followed by Montreal (97) and Calgary (66).

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 441 verified decision-maker contacts tracked across these 174 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 5, 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.