Company lists · Data refreshed September 2026

Top 25 Professional service firms based in Canada

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

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 309 companies tracked

RevenueBase identified 309 professional service firms headquartered in Canada as of September 2026 and tracks 5,517 professional contacts across them, including 2,620 with verified work emails. Toronto is the largest hub.

This list covers professional service 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 20, 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 20, 2026 86% judged on-target in blind review

309Companies

5,517Contacts tracked

2,620Verified emails

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The 25 largest professional service firms based in Canada

Ranked by team size

Top 25 of 309 professional service firms based in Canada, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to professional service 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	Crowe Mackay LLP	Indirect evidence	Vancouver, BC, CanadaHQ checked Sep 20, 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 20, 2026
2	FBL S.E.N.C.R.L. Société DE Comptables Professionnels Agréés	Strong evidence	Montréal, QC, CanadaHQ checked Sep 20, 2026	201-500	347 contacts →
	Strong evidence “FBL \| SOCIÉTÉ DE COMPTABLES PROFESSIONNELS AGRÉÉS Ayant été désigné comme étant l’un des dix plus grands cabinets au Québec, FBL jouit d’une solide expertise depuis plus de 40 ans.” Source: RevenueBase Database · checked Sep 20, 2026
3	Dmcl Chartered Professional Accountants	Indirect evidence	Vancouver, BC, CanadaHQ checked Sep 20, 2026	201-500	316 contacts →
	Indirect evidence “DMCL LLP is a full-service accounting firm dedicated to helping you achieve and exceed your business goals, no matter how ambitious.” Source: RevenueBase Database · checked Sep 20, 2026
4	Collins Barrow	Indirect evidence	Waterloo, ON, CanadaHQ checked Sep 20, 2026	1,001-5,000	228 contacts →
	Indirect 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 20, 2026
5	Kingston Ross Pasnak LLP	Strong evidence	Edmonton, AB, CanadaHQ checked Sep 20, 2026	51-200	218 contacts →
	Strong evidence “Kingston Ross Pasnak offers an array of comprehensive services through our highly skilled professionals.” Source: RevenueBase Database · checked Sep 20, 2026
6	PSB Boisjoli	Indirect evidence	Montreal, QC, CanadaHQ checked Sep 20, 2026	51-200	206 contacts →
	Indirect evidence “Basé à Montréal, PSB BOISJOLI S.E.N.C.R.L.” Source: RevenueBase Database · checked Sep 20, 2026
7	BVA	Strong evidence	Sainte-marie, QC, CanadaHQ checked Sep 20, 2026	201-500	170 contacts →
	Strong evidence “Depuis maintenant plus de 60 ans, BVA a développé une panoplie de services axés sur les préoccupations des entrepreneurs, des professionnels et des dirigeants d’entreprises.” Source: RevenueBase Database · checked Sep 20, 2026
8	Amyot Gélinas	Indirect evidence	Ste-agathe-des-monts, QC, CanadaHQ checked Sep 20, 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 20, 2026
9	Kronis, Rotsztain, Margles, Cappel LLP Krmc	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	51-200	114 contacts →
	Indirect evidence “KRMC is a diverse, multi-service law firm located in the thriving uptown business district.” Source: RevenueBase Database · checked Sep 20, 2026
10	Melo LLP	Indirect evidence	Leamington, ON, CanadaHQ checked Sep 20, 2026	51-200	103 contacts →
	Indirect evidence “With a deep affinity for progress and bold entrepreneurialism, Melo LLP is an integrated, multidisciplinary team committed to driving business sustainability and growth.” Source: RevenueBase Database · checked Sep 20, 2026
11	Famme & Co. Chartered Professional Accountants	Indirect evidence	Stratford, ON, CanadaHQ checked Sep 20, 2026	51-200	87 contacts →
	Indirect evidence “Since 1947, Famme & Co.” Source: RevenueBase Database · checked Sep 20, 2026
12	Invictus Accounting Group LLP	Indirect evidence	Vancouver, BC, CanadaHQ checked Sep 20, 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 20, 2026
13	S C Partners	Strong evidence	Mississauga, ON, CanadaHQ checked Sep 20, 2026	51-200	82 contacts →
	Strong evidence “S+C Partners has been providing professional accounting, advisory and tax services across the GTA since 1987.” Source: RevenueBase Database · checked Sep 20, 2026
14	Lipton LLP	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	51-200	77 contacts →
	Indirect evidence “Quality Service.” Source: RevenueBase Database · checked Sep 20, 2026
15	MAC LLP	Indirect evidence	Waterloo, ON, CanadaHQ checked Sep 20, 2026	51-200	70 contacts →
	Indirect evidence “At MAC LLP, our first priority is always you, your family and your business.” Source: RevenueBase Database · checked Sep 20, 2026
16	Ascend LLP Chartered Professional Accountants	Strong evidence	Cochrane, AB, CanadaHQ checked Sep 20, 2026	51-200	69 contacts →
	Strong evidence “Ascend is a professional services firm providing accounting, tax, advisory, and business consulting services to individuals, entrepreneurs, and organizations.” Source: RevenueBase Database · checked Sep 20, 2026
17	Adams Miles	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	51-200	63 contacts →
	Indirect evidence “Adams + Miles delivers accounting, audit, assurance and strategic consulting services to clients across sectors.” Source: RevenueBase Database · checked Sep 20, 2026
18	Brodeur & Létourneau CPA	Strong evidence	Mont-saint-hilaire, QC, CanadaHQ checked Sep 20, 2026	51-200	61 contacts →
	Strong evidence “Brodeur & Létourneau CPA est un cabinet comptable de professionnels agréés aux services de ses clients depuis 45 ans.” Source: RevenueBase Database · checked Sep 20, 2026
19	Norton Mcmullen LLP	Indirect evidence	Markham, ON, CanadaHQ checked Sep 20, 2026	51-200	59 contacts →
	Indirect evidence “Norton McMullen LLP is a mid-sized accounting firm based out of Markham, ON, Canada.” Source: RevenueBase Database · checked Sep 20, 2026
20	Chiasson Gauvreau INC	Strong evidence	Châteauguay, QC, CanadaHQ checked Sep 20, 2026	51-200	57 contacts →
	Strong evidence “Depuis plus de 45 ans, les professionnels de Chiasson Gauvreau Inc.” Source: RevenueBase Database · checked Sep 20, 2026
21	Vohora LLP	Indirect evidence	Vancouver, BC, CanadaHQ checked Sep 20, 2026	51-200	54 contacts →
	Indirect evidence “Vohora LLP joined Doane Grant Thornton LLP on December 1, 2025.” Source: RevenueBase Database · checked Sep 20, 2026
22	Pellerin Potvin Gagnon	Indirect evidence	Victoriaville, QC, CanadaHQ checked Sep 20, 2026	51-200	52 contacts →
	Indirect evidence “Depuis plus de 60 ans, le cabinet Pellerin Potvin Gagnon évolue au rythme des besoins de sa clientèle avec un souci constant de qualité et une rigueur exemplaire.” Source: RevenueBase Database · checked Sep 20, 2026
23	LLT LLP	Indirect evidence	Chilliwack, BC, CanadaHQ checked Sep 20, 2026	11-50	50 contacts →
	Indirect evidence “At LLT we like smart work with a dose of fun.” Source: RevenueBase Database · checked Sep 20, 2026
24	Fruitman Kates LLP	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	51-200	48 contacts →
	Indirect evidence “Fruitman Kates LLP is a public accounting firm based out of 1055 Eglinton Ave W, Toronto, ON, Canada.” Source: RevenueBase Database · checked Sep 20, 2026
25	Choquette Corriveau	Strong evidence	Québec, QC, CanadaHQ checked Sep 20, 2026	11-50	47 contacts →
	Strong evidence “Reconnu pour sa rigueur professionnelle, la qualité de ses services ainsi que sa compréhension des enjeux de la PME et s’appuyant sur une équipe dynamique et créative capable de…” Source: RevenueBase Database · checked Sep 20, 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: professional service 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 professional service firms.
Partial evidence: Its own public description names part of professional service firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name professional service 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 309 professional service firms based in Canada

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Professional service firms based in Canada at a glance

As of Sep 20, 2026

47.5%Verified-email coverage

17.9Average contacts per company

11-50Median size (employees)

12.6%Largest-city concentration · Toronto

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

149

11-50

112

51-200

201-500

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 309 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 professional service 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 “professional service 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 professional service 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 professional service 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, 2,620 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 20, 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.

Professional service firms by metro

Professional service firms in Toronto39

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 professional service 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 professional service firms are there based in Canada?

RevenueBase identified 309 professional service 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?

Crowe Mackay LLP, headquartered in Vancouver, tops this list with the largest team on record.

Which city has the most professional service firms?

Toronto leads with 39 headquartered companies, followed by Vancouver (24) and Montreal (23).

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 2,620 verified decision-maker contacts tracked across these 309 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 20, 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.