Company lists · Data refreshed September 2026

Top 25 Due diligence firms based in Canada

Name: Due diligence firms based in Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 57 companies tracked

RevenueBase identified 57 due diligence firms headquartered in Canada as of September 2026 and tracks 1,215 professional contacts across them, including 233 with verified work emails. Toronto is the largest hub.

This list covers due diligence firms headquartered in 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 19, 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 19, 2026 86% judged on-target in blind review

57Companies

1,215Contacts tracked

233Verified emails

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The 25 largest due diligence firms based in Canada

Ranked by team size

Top 25 of 57 due diligence firms based in Canada, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to due diligence firms: 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	Sterlingbackcheck	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 19, 2026	1,001-5,000	408 contacts →
	Indirect evidence “Sterling was acquired by First Advantage on October 31st, 2024.” Source: RevenueBase Database · checked Sep 19, 2026
2	Xpera Risk Mitigation & Investigation	Indirect evidence	Markham, ON, CanadaHQ checked Sep 19, 2026	1,001-5,000	214 contacts →
	Indirect evidence “Xpera has been a trusted partner to businesses and governments for over 50 years.” Source: RevenueBase Database · checked Sep 19, 2026
3	SIRCO	Indirect evidence	Montréal-nord, CanadaHQ checked Sep 19, 2026	51-200	53 contacts →
	Indirect evidence “SIRCO offers efficient investigative methods to counter: Theft, Fraud, Collusion with Suppliers, Drug Trafficking, Threats, Trademarks Piracy, Labour Disputes, Harassment…” Source: RevenueBase Database · checked Sep 19, 2026
4	Larrek Investigations	Indirect evidence	Waterloo, ON, CanadaHQ checked Sep 19, 2026	51-200	45 contacts →
	Indirect evidence “Larrek Investigations has been in operation since April 30, 1980, with our current ownership having been in place since October 31, 2008.” Source: RevenueBase Database · checked Sep 19, 2026
5	Groupe Trak	Indirect evidence	Saint-Hubert, QC, CanadaHQ checked Sep 19, 2026	51-200	33 contacts →
	Indirect evidence “Groupe Trak est une firme spécialisée dans le secteur de la sécurité corporative qui offre une gamme complète de services professionnels et personnalisés : SERVICES RH…” Source: RevenueBase Database · checked Sep 19, 2026
6	Aberdeen Investigations INC	Indirect evidence	Mississauga, ON, CanadaHQ checked Sep 19, 2026	51-200	27 contacts →
	Indirect evidence “Aberdeen Investigation Inc.” Source: RevenueBase Database · checked Sep 19, 2026
7	King International Advisory Group	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 19, 2026	11-50	22 contacts →
	Indirect evidence “Investigations \| Intelligence \| Enterprise Risk Management King International Advisory Group is an Investigation & Enterprise Risk Management agency committed to assisting…” Source: RevenueBase Database · checked Sep 19, 2026
8	Alliance Credit	Indirect evidence	Montréal, QC, CanadaHQ checked Sep 19, 2026	11-50	17 contacts →
	Indirect evidence “Vérification légale & solvabilité commerciale : obtenez instantanément un rapport de crédit via notre portail avec les données en provenance des plus grands bureaux de crédit à…” Source: RevenueBase Database · checked Sep 19, 2026
9	Auditsoft	Indirect evidence	Calgary, ON, CanadaHQ checked Sep 19, 2026	11-50	16 contacts →
	Indirect evidence “AuditSoft is the industry leader in digital audit and compliance solutions, setting the standard for secure, verifiable workplace risk assessments.” Source: RevenueBase Database · checked Sep 19, 2026
10	Barker Hutchinson	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 19, 2026	11-50	13 contacts →
	Indirect evidence “WHEN THE STAKES ARE HIGH, YOU NEED TO BE SURE When critical issues arise, you need objective answers that guide you toward the right decisions.” Source: RevenueBase Database · checked Sep 19, 2026
11	Reed Research Investigations	Indirect evidence	Markham, ON, CanadaHQ checked Sep 19, 2026	11-50	12 contacts →
	Indirect evidence “Reed Research is your powerful partner in Insurance, Corporate and Legal Investigations.” Source: RevenueBase Database · checked Sep 19, 2026
12	Progress Investigations	Indirect evidence	AB, CanadaHQ checked Sep 19, 2026	11-50	8 contacts →
	Indirect evidence “Progress Investigations is a national investigations firm with offices serving BC, AB, ON, QC, NB, PE, and NS.” Source: RevenueBase Database · checked Sep 19, 2026
13	Whitehall Bureau Of Canada Limited	Indirect evidence	Stoney Creek, ON, CanadaHQ checked Sep 19, 2026	1-10	7 contacts →
	Indirect evidence “Full service investigation firm.” Source: RevenueBase Database · checked Sep 19, 2026
14	CSI Background Screening	Indirect evidence	Halifax, NS, CanadaHQ checked Sep 19, 2026	11-50	6 contacts →
	Indirect evidence “CSI Screening is Canada's #1 background screening company, and is RCMP approved to provide multiple services for Canada, USA and over 200 other countries in the world.” Source: RevenueBase Database · checked Sep 19, 2026
15	Groupe Securi-Check	Indirect evidence	Montréal, QC, CanadaHQ checked Sep 19, 2026	11-50	6 contacts →
	Indirect evidence “Securi-Check Group works in the field of investigation, pre-employment checks, pre-rental checks and fingerprinting.” Source: RevenueBase Database · checked Sep 19, 2026
16	Nexlevel	Strong evidence	Rocky View County, AB, CanadaHQ checked Sep 19, 2026	1-10	5 contacts →
	Strong evidence “NexLevel provides Leadership Due Diligence for organizations in the pre-launch window of an M&A integration.” Source: RevenueBase Database · checked Sep 19, 2026
17	Acurus Business Consulting	Indirect evidence	Oakville, ON, CanadaHQ checked Sep 19, 2026	1-10	4 contacts →
	Indirect evidence “Internal Controls are a vital component of financial reporting standards, as outlined by the SEC.” Source: RevenueBase Database · checked Sep 19, 2026
18	Scout Intelligence INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 19, 2026	1-10	3 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
19	Specialty Risk & Intelligence Services Inc. Sris	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 19, 2026	1-10	3 contacts →
	Indirect evidence “Specialty Risk & Intelligence Services Inc.(SRIS) is a multidisciplinary Intelligence, Investigation and Risk Consulting agency that was founded by a group of industry experts.” Source: RevenueBase Database · checked Sep 19, 2026
20	NEW Data Risk Solutions & Investigations INC	Indirect evidence	Vancouver, CanadaHQ checked Sep 19, 2026	11-50	3 contacts →
	Indirect evidence “INVESTIGATIVE SERVICES, SURVEILLANCE SERVICES & RISK SOLUTIONS LET NEW DATA INFORM YOUR DECISIONS New Data Risk Solutions & Investigations is a British Columbia based Canadian…” Source: RevenueBase Database · checked Sep 19, 2026
21	Contact Investigation	Indirect evidence	Québec, QC, CanadaHQ checked Sep 19, 2026	1-10	2 contacts →
	Indirect evidence “Firme d'investigation qui ce spécialise en enquête, recherche de personne, renseignement, solvabilité, filature, conflit de travail et plus encore.” Source: RevenueBase Database · checked Sep 19, 2026
22	BMD Investigation ET Protection	Indirect evidence	Laval, QC, CanadaHQ checked Sep 19, 2026	11-50	2 contacts →
	Indirect evidence “BMD Investigation & Protection, a firm accredited by the Quebec Private Security Office INV-20058123, offers a range of private investigation services, corporate audits and…” Source: RevenueBase Database · checked Sep 19, 2026
23	Maze Intel INC	Indirect evidence	Ottawa, CanadaHQ checked Sep 19, 2026	1-10	1 contacts →
	Indirect evidence “Welcome to Maze Intel, a cutting-edge investigative and intelligence firm that offers bespoke solutions to businesses and individuals seeking to navigate the complexities of…” Source: RevenueBase Database · checked Sep 19, 2026
24	Babic & Associates	Indirect evidence	Oakville, ON, CanadaHQ checked Sep 19, 2026	1-10	1 contacts →
	Indirect evidence “At Babic & Associates we provide detailed investigative services to the insurance, legal, corporate and government communities.” Source: RevenueBase Database · checked Sep 19, 2026
25	Root Resolutions INC	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	1-10	1 contacts →
	Indirect evidence “Root Resolutions specializes in dealing with high-risk, high-profile concerns involving workplace bullying/harassment, sexual harassment, fraud/theft, conflict of interest and…” Source: RevenueBase Database · checked Sep 19, 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: due diligence firms. 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 due diligence firms.
Partial evidence: Its own public description names part of due diligence firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name due diligence firms. 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 57 due diligence firms based in Canada

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Due diligence firms based in Canada at a glance

As of Sep 19, 2026

19.2%Verified-email coverage

21.3Average contacts per company

11-50Median size (employees)

29.8%Largest-city concentration · Toronto

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for Canada, so it is reported there. Company counts and contact totals on this page are exact for Canada, over 57 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 due diligence firms, 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 Canada whose own description of what they do matches “due diligence firms”. 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 due diligence firms), 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 due diligence firms, and records with no verified work email. Companies headquartered outside Canada 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, 233 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 19, 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.

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 due diligence firms, 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 due diligence firms are there based in Canada?

RevenueBase identified 57 due diligence firms headquartered in 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?

Sterlingbackcheck, headquartered in Toronto, tops this list with the largest team on record.

Which city has the most due diligence firms?

Toronto leads with 17 headquartered companies, followed by Montreal (4) and Quebec (4).

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 233 verified decision-maker contacts tracked across these 57 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 19, 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.