Company lists · Data refreshed September 2026

Top 22 Managed security service providers based in Montreal, Canada

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

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 97 companies tracked

RevenueBase identified 97 managed security service providers headquartered in Montreal, Canada as of September 2026 and tracks 1,016 professional contacts across them, including 490 with verified work emails. Toronto is the largest hub.

This list covers managed security service providers headquartered in Montreal, 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

97Companies

1,016Contacts tracked

490Verified emails

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The 22 largest managed security service providers based in Montreal, Canada

Ranked by team size

Top 22 of 97 managed security service providers based in Montreal, 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	ESI TechnologiesPartial evidence	Montreal, QC, CanadaHQ checked Sep 5, 2026	201-500	196
	“Since 1994, ESI’s focus has always been data management and protection.” Source: company website · checked Sep 5, 2026
2	SecureopsStrong evidence	Montreal, QC, CanadaHQ checked Sep 5, 2026	51-200	106
	“SecureOps is a global managed security services provider (MSSP) with 25 years of experience strengthening the security maturity and resilience of enterprises and commercial…” Source: company website · checked Sep 5, 2026
3	Streamscan CybersecurityIndirect evidence	Montreal, QC, CanadaHQ checked Sep 5, 2026	11-50	46
	“Since 2011, StreamScan has been committed to protecting critical businesses especially in the defense, aerospace, and critical infrastructure sectors from cyberattacks.” Source: company website · checked Sep 5, 2026
4	Fusion Cyber GroupStrong evidence	Montreal, QC, CanadaHQ checked Sep 5, 2026	11-50	19
	“Founded in 1985 and headquartered in Montreal, Fusion Cyber Group is a Canadian Managed Security Service Provider (MSSP), Managed IT Services Provider (MSP), and value-added…” Source: company website · checked Sep 5, 2026
5	Vars CorporationIndirect evidence	Montreal, QC, CanadaHQ checked Sep 5, 2026	11-50	16
	“VARS provides flexible cutting-edge cybersecurity solutions that are adapted to your organization’s reality.” Source: company website · checked Sep 5, 2026
6	Assurance ITPartial evidence	Montreal, QC, CanadaHQ checked Sep 5, 2026	11-50	14
	“Teaming up with the best cyber security providers to bring you the best protection.” Source: company website · checked Sep 5, 2026
7	Optisigma INCIndirect evidence	Montreal, QC, CanadaHQ checked Sep 5, 2026	11-50	14
	“Optisigma is a consulting firm dedicated to driving digital transformation, cybersecurity, and technology innovation.” Source: company website · checked Sep 5, 2026
8	ResitekPartial evidence	Montreal, QC, CanadaHQ checked Sep 5, 2026	1-10	12
	“Founded in 2003, RESITEK has been a trusted Managed Service Provider (MSP) dedicated to delivering comprehensive IT solutions for SMEs.” Source: company website · checked Sep 5, 2026
9	Gardien VirtuelIndirect evidence	Montreal, QC, CanadaHQ checked Sep 5, 2026	201-500	11
	“Un savoir-faire en sécurité inégalé, Guidé par la confiance Gardien Virtuel comprend le cheminement vers une transformation numérique sécurisée.” Source: company website · checked Sep 5, 2026
10	Data Next StepIndirect evidence	Montreal, QC, CanadaHQ checked Sep 5, 2026	11-50	11
	“We are helping businesses scale securely through tailored services.” Source: company website · checked Sep 5, 2026
11	CyvaultIndirect evidence	Montreal, QC, CanadaHQ checked Sep 5, 2026	11-50	9
	“CyVault™ has emerged as a global, cyber defense leader offering the most advanced comprehensive protection for companies and organizations of any industry and size.” Source: company website · checked Sep 5, 2026
12	ClickcontrolStrong evidence	Montreal, QC, CanadaHQ checked Sep 5, 2026	11-50	8
	“We provide a comprehensive suite of services from network security and data protection to regulatory compliance and proactive threat management.” Source: company website · checked Sep 5, 2026
13	ORA ConsultantsPartial evidence	Montreal, QC, CanadaHQ checked Sep 5, 2026	11-50	8
	“ORA is the go-to security company that has already helped Canadian and American companies enhance their security posture to avoid risks of advanced persistent threats.” Source: company website · checked Sep 5, 2026
14	CD Info INCIndirect evidence	Montreal, QC, CanadaHQ checked Sep 5, 2026	1-10	8
	“Implantée depuis 1994 dans la région montréalaise, CD Info Inc.” Source: company website · checked Sep 5, 2026
15	Secur01Indirect evidence	Montreal, QC, CanadaHQ checked Sep 5, 2026	1-10	8
	“Fondée en 2014, Secur01 s'est imposée comme un leader québécois de la cybersécurité.” Source: company website · checked Sep 5, 2026
16	Cyberdefense AI INCIndirect evidence	Montreal, QC, CanadaHQ checked Sep 5, 2026	11-50	7
	“CYBERDEFENSE.AI is reshaping the future of cybersecurity with its intelligent V3 platform, more than just a Web Application Firewall (WAF).” Source: company website · checked Sep 5, 2026
17	Tsic Solutions INCIndirect evidence	Montreal, QC, CanadaHQ checked Sep 5, 2026	1-10	6
	“Chez TSIC Solutions, nous aidons les PME du Grand Montréal à transformer leur gestion des TI grâce à des solutions technologiques avancées, sécurisées et adaptées à leurs besoins…” Source: company website · checked Sep 5, 2026
18	InnucloudIndirect evidence	Montreal, QC, CanadaHQ checked Sep 5, 2026	11-50	6
	“InnuCloud stands as a beacon in the realm of cybersecurity, cloud solutions, and IT modernization, providing unparalleled services designed to navigate the complexities of the…” Source: company website · checked Sep 5, 2026
19	IdahysIndirect evidence	Montreal, QC, CanadaHQ checked Sep 5, 2026	1-10	5
	“Empowering Businesses with Tailored and Cutting-Edge Cybersecurity and IT solutions At Idahys, we believe in delivering a unique approach to every business, carefully considering…” Source: company website · checked Sep 5, 2026
20	SM Protection Global Solutions INCIndirect evidence	Montreal, QC, CanadaHQ checked Sep 5, 2026	1-10	5
	“SM Protection Inc.” Source: company website · checked Sep 5, 2026
21	SB Software INCIndirect evidence	Montreal, QC, CanadaHQ checked Sep 5, 2026	1-10	5
	Source: company website · checked Sep 5, 2026
22	Cyberspective INCIndirect evidence	Montreal, QC, CanadaHQ checked Sep 5, 2026	1-10	4
	“As industry leaders, we redefine the role of cybersecurity in business.” Source: company website · checked Sep 5, 2026

Showing 22 of 97 managed security service providers based in Montreal, Canada

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Managed security service providers based in Montreal, 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

201-500

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 Montreal, over 97 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 Montreal, 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 Montreal 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, 490 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 Montreal, Canada?

RevenueBase identified 97 managed security service providers headquartered in Montreal, 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?

ESI Technologies, headquartered in Montreal, 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 490 verified decision-maker contacts tracked across these 97 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.