Company lists · Data refreshed September 2026
Top 10 Security firms based in Ottawa, Canada
RevenueBase identified 34 security firms headquartered in Ottawa, Canada as of September 2026 and tracks 1,665 professional contacts across them, including 49 with verified work emails. Toronto is the largest hub.
This list covers security firms headquartered in Ottawa, 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 6, 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.
The 10 largest security firms based in Ottawa, Canada
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 736 | ||||
“Commissionaires manages the largest digital fingerprinting infrastructure in Canada, all while growing the diversity of physical, electronic and cyber security employment…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | 104 | ||||
“Iron Horse Security is a “people first” company that, through our team of highly trained professionals, has a mission to provide our clients the highest caliber of Customer…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 3 | 77 | ||||
“We strive to be Ottawa's top rated Security Guard Company.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | 73 | ||||
“Capital Security specializes in the installation of Fire Alarms, Security Systems, Burglar Alarms, CCTV and Access Control including networked sytems (commercial and residential).” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | 10 | ||||
“The vision of Signal of Ottawa is to provide a full suite of world-class and industry-leading security services for residential, commercial, retail and institutional customers in…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | Signal 88 Security Of OttawaStrong evidence | 10 | |||
“Signal 88 Security of Ottawa, Ontario was founded by Andrew Ralph in 2015.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | 8 | ||||
“Welcome to Limerock, where security meets innovation.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | 5 | ||||
“Harkav Security delivers dependable on-site protection and mobile patrols for property managers, construction firms, retailers, events, and residential communities across AB, ON…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | 4 | ||||
“Backed by 15 years of experience in the security industry, Next Technology Systems is committed to offering the most innovative physical security solutions, by providing the…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 10 | 3 | ||||
“Reliable We are accountable to you the client first and foremost.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
Showing 10 of 34 security firms based in Ottawa, Canada
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Security firms based in Ottawa, Canada at a glance
As of Sep 6, 2026Companies by employee count
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 Ottawa, over 34 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 security firms, 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 Ottawa, Canada whose own description of what they do matches “security firms”. 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 security firms, and records with no verified work email. Companies headquartered outside Ottawa 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, 49 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 6, 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.
Security firms by metro in Canada
- Security firms in Toronto144
- Security firms in Calgary55
- Security firms in Mississauga53
- Security firms in Edmonton52
- Security firms in Montreal52
- Security firms in Surrey47
- Security firms in Vancouver45
- Security firms in Ottawa34
- Security firms in Brampton30
Frequently asked
How many security firms are there based in Ottawa, Canada?
RevenueBase identified 34 security firms headquartered in Ottawa, 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?
Commissionaires Ottawa, headquartered in Ottawa, tops this list with the largest team on record.
Which city has the most security firms?
Toronto leads with 144 headquartered companies, followed by Calgary (55) and Mississauga (53).
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 49 verified decision-maker contacts tracked across these 34 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 6, 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.