Company lists · Data refreshed September 2026

Top 25 Professional services firms based in Canada

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

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 2,844 companies tracked

RevenueBase identified 2,844 professional services firms headquartered in Canada as of September 2026 and tracks 32,813 professional contacts across them, including 15,764 with verified work emails and 1,657 with mobile numbers. Toronto is the largest hub.

This list covers professional services 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, 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

2,844Companies

32,813Contacts tracked

15,764Verified emails

1,657Mobile numbers

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The 25 largest professional services firms based in Canada

Ranked by team size

Top 25 of 2,844 professional services firms based in Canada, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names professional services firms: 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	MNPIndirect evidence	Calgary, AB, CanadaHQ checked Sep 5, 2026	5,001-10,000	8,773
	“MNP is a leading national accounting, tax and business consulting firm in Canada.” Source: company website · checked Sep 5, 2026
2	MalletteIndirect evidence	Québec, QC, CanadaHQ checked Sep 5, 2026	1,001-5,000	1,268
	“Mallette compte plus de 40 bureaux solidement implantés dans plusieurs régions du Québec et regroupe plus de 1 600 ressources œuvrant dans différents secteurs d’activité.” Source: company website · checked Sep 5, 2026
3	Crowe Mackay LLPIndirect evidence	Vancouver, BC, CanadaHQ checked Sep 5, 2026	201-500	402
	“Crowe MacKay LLP is a vibrant team of trusted advisors in eight cities across western and northern Canada.” Source: company website · checked Sep 5, 2026
4	Welch LLPIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	201-500	399
	“Welch LLP is a Chartered Public Accounting firm that has deep roots in the communities it serves.” Source: company website · checked Sep 5, 2026
5	FBL S.E.N.C.R.L. Société DE Comptables Professionnels AgréésStrong evidence	Montréal, QC, CanadaHQ checked Sep 5, 2026	201-500	347
	“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: company website · checked Sep 5, 2026
6	Invisor Consulting ServicesStrong evidence	Fergus, ON, CanadaHQ checked Sep 5, 2026	201-500	341
	“We are a team of accountants qualified from professional bodies across the globe who have considerable experience in finance and related digital transformation.” Source: company website · checked Sep 5, 2026
7	Dmcl Chartered Professional AccountantsIndirect evidence	Vancouver, BC, CanadaHQ checked Sep 5, 2026	201-500	316
	“DMCL LLP is a full-service accounting firm dedicated to helping you achieve and exceed your business goals, no matter how ambitious.” Source: company website · checked Sep 5, 2026
8	Manning Elliott Accountants & Business AdvisorsIndirect evidence	Vancouver, BC, CanadaHQ checked Sep 5, 2026	201-500	296
	“Manning Elliott LLP is considered to be one of the most well-respected and progressive mid-sized firms in the Lower Mainland & Fraser Valley.” Source: company website · checked Sep 5, 2026
9	Crowe SobermanStrong evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	51-200	265
	“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: company website · checked Sep 5, 2026
10	Segal Gcse LLPIndirect evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	201-500	258
	“At Segal GCSE LLP, we embrace an ambitious firm philosophy: to provide our valued clients with an expansive service experience that enables greater opportunities for growth and…” Source: company website · checked Sep 5, 2026
11	Collins BarrowIndirect evidence	Waterloo, ON, CanadaHQ checked Sep 5, 2026	1,001-5,000	228
	“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: company website · checked Sep 5, 2026
12	Kingston Ross Pasnak LLPStrong evidence	Edmonton, AB, CanadaHQ checked Sep 5, 2026	51-200	218
	“Kingston Ross Pasnak offers an array of comprehensive services through our highly skilled professionals.” Source: company website · checked Sep 5, 2026
13	PSB BoisjoliIndirect evidence	Montreal, QC, CanadaHQ checked Sep 5, 2026	51-200	206
	“Basé à Montréal, PSB BOISJOLI S.E.N.C.R.L.” Source: company website · checked Sep 5, 2026
14	Smythe LLPIndirect evidence	Vancouver, BC, CanadaHQ checked Sep 5, 2026	201-500	199
	“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: company website · checked Sep 5, 2026
15	Fuller Landau LLPIndirect evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	51-200	192
	“Work together with people excited by your goals and eager to address your unique business needs.” Source: company website · checked Sep 5, 2026
16	BVAStrong evidence	Sainte-marie, QC, CanadaHQ checked Sep 5, 2026	201-500	170
	“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: company website · checked Sep 5, 2026
17	ZeifmansIndirect evidence	Toronto, ON, CanadaHQ checked Sep 5, 2026	51-200	168
	“Zeifmans is a full-service tax, accounting and consulting firm based in Toronto, Canada.” Source: company website · checked Sep 5, 2026
18	Bcgo S.E.N.C.R.LIndirect evidence	Montréal, QC, CanadaHQ checked Sep 5, 2026	51-200	164
	“BCGO est un cabinet indépendant d’expertise comptable et de services-conseils aux entrepreneurs.” Source: company website · checked Sep 5, 2026
19	Hcsc INCIndirect evidence	Longueuil, QC, CanadaHQ checked Sep 5, 2026	n/a	164
	“Services-conseils en optimisation de processus d'affaires, comptabilité, financement, démarrage d'entreprise, implantation de logiciel de gestion intégrée et recrutement.” Source: company website · checked Sep 5, 2026
20	Lemieux NoletStrong evidence	Lévis, QC, CanadaHQ checked Sep 5, 2026	201-500	163
	“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: company website · checked Sep 5, 2026
21	DJB Chartered Professional AccountantsIndirect evidence	St. Catharines, ON, CanadaHQ checked Sep 5, 2026	51-200	155
	“BIG ENOUGH TO KNOW.” Source: company website · checked Sep 5, 2026
22	FCR Freelandt Caldwell Reilly LLPStrong evidence	Sudbury, ON, CanadaHQ checked Sep 5, 2026	51-200	137
	“We're FCR, YOUR Chartered Professional Accountants!” Source: company website · checked Sep 5, 2026
23	Davis Martindale LLPIndirect evidence	London, ON, CanadaHQ checked Sep 5, 2026	51-200	122
	“At Davis Martindale, our accountants work to bring you the peace of mind you’re in search of with a touch of personality.” Source: company website · checked Sep 5, 2026
24	BJCIndirect evidence	Sainte-julie, QC, CanadaHQ checked Sep 5, 2026	51-200	120
	“BJC = compétence + connaissance + expérience BJC est un cabinet à guichet unique offrant une gamme complète de services comptables adaptés aux besoins des sociétés privées.” Source: company website · checked Sep 5, 2026
25	Amyot GélinasIndirect evidence	Ste-agathe-des-monts, QC, CanadaHQ checked Sep 5, 2026	51-200	114
	“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: company website · checked Sep 5, 2026

Showing 25 of 2,844 professional services firms based in Canada

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Professional services firms based in Canada at a glance

As of Sep 5, 2026

1-10Median size (employees)

TorontoLargest hub · 348 HQs

1,657Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

2,017

11-50

659

51-200

117

201-500

501-1,000

1,001-5,000

5,001-10,000

Verified emails by last verification

0–30

14,766

31–60

926

61–90

90–180

180+

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 services 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 Canada whose own description of what they do matches “professional services 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 professional services 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 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, 15,764 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.

Professional services firms by metro

Frequently asked

How many professional services firms are there based in Canada?

RevenueBase identified 2,844 professional services 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?

MNP, headquartered in Calgary, tops this list with the largest team on record.

Which city has the most professional services firms?

Toronto leads with 348 headquartered companies, followed by Calgary (166) and Montreal (165).

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 15,764 verified decision-maker contacts tracked across these 2,844 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.