Company lists · Data refreshed September 2026

Top 25 Audit and assurance firms based in Canada

Name: Audit and assurance 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 295 companies tracked

RevenueBase identified 295 audit and assurance firms headquartered in Canada as of September 2026 and tracks 19,260 professional contacts across them, including 9,142 with verified work emails. Toronto is the largest hub.

This list covers audit and assurance 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

295Companies

19,260Contacts tracked

9,142Verified emails

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The 25 largest audit and assurance firms based in Canada

Ranked by team size

Top 25 of 295 audit and assurance 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 audit and assurance 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	PWC Canada	Indirect evidence	Toronto, CanadaHQ checked Sep 19, 2026	5,001-10,000	5,573 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
2	BDO Canada	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 19, 2026	1,001-5,000	4,833 contacts →
	Indirect evidence “Canada’s Top 100 Employers 2025 I 2024 I 2023 I 2022 BDO Canada LLP is a leading provider of professional services to clients across a variety of sectors and segments.” Source: RevenueBase Database · checked Sep 19, 2026
3	Raymond Chabot Grant Thornton	Indirect evidence	Montréal, QC, CanadaHQ checked Sep 19, 2026	1,001-5,000	2,539 contacts →
	Indirect evidence “Raymond Chabot Grant Thornton is a professional services firm dedicated to the success of organizations and their leaders since 1948.” Source: RevenueBase Database · checked Sep 19, 2026
4	RSM Canada	Partial evidence	Toronto, ON, CanadaHQ checked Sep 19, 2026	10001+	897 contacts →
	Partial evidence “RSM Canada is a leading global provider of assurance, tax, and consulting services, and is the Canadian member firm of RSM International.” Source: RevenueBase Database · checked Sep 19, 2026
5	Crowe Mackay LLP	Indirect evidence	Vancouver, BC, CanadaHQ checked Sep 19, 2026	201-500	402 contacts →
	Indirect evidence “Crowe MacKay LLP is a vibrant team of trusted advisors in eight cities across western and northern Canada.” Source: RevenueBase Database · checked Sep 19, 2026
6	Crowe Soberman	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 19, 2026	51-200	265 contacts →
	Indirect evidence “As an award-winning public accounting firm, we provide exceptional professional service (by being accessible, responsive and proactive) to meet the special and on-going individual…” Source: RevenueBase Database · checked Sep 19, 2026
7	Collins Barrow	Partial evidence	Waterloo, ON, CanadaHQ checked Sep 19, 2026	1,001-5,000	228 contacts →
	Partial evidence “Recognized as Canada’s mid-market leader for audit, tax and advisory solutions, our association of 24 independent member firms comprises the eighth largest public accounting group…” Source: RevenueBase Database · checked Sep 19, 2026
8	PSB Boisjoli	Indirect evidence	Montreal, QC, CanadaHQ checked Sep 19, 2026	51-200	206 contacts →
	Indirect evidence “Basé à Montréal, PSB BOISJOLI S.E.N.C.R.L.” Source: RevenueBase Database · checked Sep 19, 2026
9	Smythe LLP	Partial evidence	Vancouver, BC, CanadaHQ checked Sep 19, 2026	201-500	199 contacts →
	Partial evidence “Smythe is a BC-based accounting firm recognized for exceptional work in the areas of assurance, taxation and business advisory services for private and public companies…” Source: RevenueBase Database · checked Sep 19, 2026
10	Lemieux Nolet	Indirect evidence	Lévis, QC, CanadaHQ checked Sep 19, 2026	201-500	163 contacts →
	Indirect evidence “Lemieux Nolet, cabinet de comptables professionnels agréés, œuvre dans le domaine depuis 1949 en vous offrant entre autres des services en certification, fiscalité, évaluation…” Source: RevenueBase Database · checked Sep 19, 2026
11	Davis Martindale LLP	Indirect evidence	London, ON, CanadaHQ checked Sep 19, 2026	51-200	122 contacts →
	Indirect evidence “At Davis Martindale, our accountants work to bring you the peace of mind you’re in search of with a touch of personality.” Source: RevenueBase Database · checked Sep 19, 2026
12	Mcgovern Hurley LLP	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 19, 2026	51-200	114 contacts →
	Indirect evidence “McGovern Hurley commenced operations in 1980.” Source: RevenueBase Database · checked Sep 19, 2026
13	Amyot Gélinas	Indirect evidence	Ste-agathe-des-monts, QC, CanadaHQ checked Sep 19, 2026	51-200	114 contacts →
	Indirect evidence “Dès la création du cabinet Amyot Gélinas il y a maintenant plus de 30 ans, notre rêve était de grandir avec notre clientèle et de développer avec elle un partenariat fondé sur le…” Source: RevenueBase Database · checked Sep 19, 2026
14	Davidson & Company LLP	Indirect evidence	Vancouver, BC, CanadaHQ checked Sep 19, 2026	51-200	109 contacts →
	Indirect evidence “At Davidson & Company, we believe that relationships are built with people, not companies.” Source: RevenueBase Database · checked Sep 19, 2026
15	Dallaire Forest Kirouac, Comptables Professionnels Agréés S.E.N.C.R.L	Indirect evidence	Québec, QC, CanadaHQ checked Sep 19, 2026	51-200	92 contacts →
	Indirect evidence “Dallaire Forest Kirouac (DFK) est un cabinet d’expert(e)s‑comptables offrant des services de certification, comptabilité, fiscalité, juricomptabilité, d’évaluation d’entreprise et…” Source: RevenueBase Database · checked Sep 19, 2026
16	Famme & Co. Chartered Professional Accountants	Indirect evidence	Stratford, ON, CanadaHQ checked Sep 19, 2026	51-200	87 contacts →
	Indirect evidence “Since 1947, Famme & Co.” Source: RevenueBase Database · checked Sep 19, 2026
17	Invictus Accounting Group LLP	Indirect evidence	Vancouver, BC, CanadaHQ checked Sep 19, 2026	51-200	86 contacts →
	Indirect evidence “Located in the heart of Downtown Vancouver, Invictus Accounting Group LLP provides consulting, accounting and tax advisory for publicly listed and privately held companies.” Source: RevenueBase Database · checked Sep 19, 2026
18	Taylor Leibow LLP Accountants And Advisors	Indirect evidence	Hamilton, ON, CanadaHQ checked Sep 19, 2026	51-200	86 contacts →
	Indirect evidence “Taylor Leibow LLP is the largest and most respected independent public accounting firm in the Greater Hamilton and Burlington areas.” Source: RevenueBase Database · checked Sep 19, 2026
19	Ward & Uptigrove	Indirect evidence	Listowel, ON, CanadaHQ checked Sep 19, 2026	51-200	86 contacts →
	Indirect evidence “Realize your full potential at Ontario’s largest independent accounting firm.” Source: RevenueBase Database · checked Sep 19, 2026
20	Canadian Public Accountability Board Cpab	Partial evidence	Toronto, ON, CanadaHQ checked Sep 19, 2026	51-200	83 contacts →
	Partial evidence “The Canadian Public Accountability Board (CPAB) is Canada’s audit regulator responsible for the regulation of public accounting firms that audit Canadian public companies.” Source: RevenueBase Database · checked Sep 19, 2026
21	KRP LLP	Partial evidence	Markham, ON, CanadaHQ checked Sep 19, 2026	11-50	82 contacts →
	Partial evidence “Founded in 1973, KRP LLP provides strategic tax, accounting and assurance, financial advisory and consulting and risk management services to private mid-market organizations and…” Source: RevenueBase Database · checked Sep 19, 2026
22	Logan Katz LLP	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 19, 2026	51-200	80 contacts →
	Partial evidence “Logan Katz is a forward-thinking public accounting firm delivering high-quality, client inspired accounting, taxation, assurance and business advisory services in Ottawa and…” Source: RevenueBase Database · checked Sep 19, 2026
23	PKF Antares	Strong evidence	Calgary, AB, CanadaHQ checked Sep 19, 2026	11-50	73 contacts →
	Strong evidence “PKF ANTARES offers wide range of Assurance, Accounting, Tax and Corporate Finance services including- External Audits, Reviews and Compilation of IFRS, ASPE, USGAAP financial…” Source: RevenueBase Database · checked Sep 19, 2026
24	Clearhouse LLP	Indirect evidence	Mississauga, ON, CanadaHQ checked Sep 19, 2026	51-200	72 contacts →
	Indirect evidence “We are an accounting, tax, and business consulting firm based in the Greater Toronto Area, Canada.” Source: RevenueBase Database · checked Sep 19, 2026
25	Pettinelli Mastroluisi LLP	Indirect evidence	Hamilton, ON, CanadaHQ checked Sep 19, 2026	51-200	65 contacts →
	Indirect evidence “For more than four decades, we’ve supported businesses, entrepreneurs, and nonprofit organizations with, grounded in technical excellence and professional integrity.” 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: audit and assurance 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 audit and assurance firms.
Partial evidence: Its own public description names part of audit and assurance firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name audit and assurance 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 295 audit and assurance firms based in Canada

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Audit and assurance firms based in Canada at a glance

As of Sep 19, 2026

47.5%Verified-email coverage

65.3Average contacts per company

11-50Median size (employees)

13.6%Largest-city concentration · Toronto

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

127

11-50

118

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 295 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 audit and assurance 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 “audit and assurance 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 audit and assurance 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 audit and assurance 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, 9,142 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.

Audit and assurance firms by metro

Audit and assurance firms in Toronto40

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 audit and assurance 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 audit and assurance firms are there based in Canada?

RevenueBase identified 295 audit and assurance 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?

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

Which city has the most audit and assurance firms?

Toronto leads with 40 headquartered companies, followed by Vancouver (24) and Montreal (20).

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 9,142 verified decision-maker contacts tracked across these 295 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.