Company lists · Data refreshed September 2026

Top 17 Top accounting firms based in Montreal, Canada

RevenueBase identified 68 company matches for top accounting firms associated with Montreal, Canada as of September 2026 and tracks 4,204 professional contacts across them, including 2,334 with verified work emails. Across Canada, Toronto is the largest hub for this category (140 companies); Montreal has 68.

This list covers company matches for top accounting firms associated with Montreal, Canada, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 21, 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 RevenueBase SmartSearch · Exact Recorded Sep 21, 2026 How this list was built
68Companies
4,204Contacts tracked
2,334Verified emails
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The 17 largest top accounting firms based in Montreal, Canada

Ranked by team size
Top 17 of 68 company matches for top accounting firms based in Montreal, Canada, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchMontreal, QC, CanadaHQ recorded Sep 21, 202651-200206 contacts →

Exact match

“Basé à Montréal, PSB BOISJOLI S.E.N.C.R.L.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2Exact matchMontreal, QC, CanadaHQ recorded Sep 21, 20261,001-5,00046 contacts →

Exact match

“Palmarès des 100 meilleurs employeurs 2026 | 2025 I 2024 I 2023 I 2022 BDO Canada s.r.l./S.E.N.C.R.L.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3Exact matchMontreal, QC, CanadaHQ recorded Sep 21, 202651-20017 contacts →

Exact match

“Since 1935, we have prided ourselves on the strong relationships we have built with each and every one of the businesses we serve.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4Exact matchMontreal, QC, CanadaHQ recorded Sep 21, 202611-5015 contacts →

Exact match

“The staff at LCA has been providing professional accounting and assurance services for over 30 years.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5Exact matchMontreal, QC, CanadaHQ recorded Sep 21, 20261-1010 contacts →

Exact match

“Que ce soit pour votre entreprise ou pour des services fiscaux personnalisés, notre équipe compétente et dédiée vous propose des services sur mesure qui vous permettront…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6Exact matchMontreal, QC, CanadaHQ recorded Sep 21, 202651-20010 contacts →

Exact match

“Le 1er septembre 2015, les cabinets Rocheleau Labranche CPA inc.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7Exact matchMontreal, QC, CanadaHQ recorded Sep 21, 202611-509 contacts →

Exact match

“BRUNET ROY DUBÉ, CPA s.e.n.c.r.l.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8Exact matchMontreal, QC, CanadaHQ recorded Sep 21, 202651-2007 contacts →

Exact match

“Mazars is an internationally integrated partnership, specializing in audit, tax and advisory.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9Exact matchMontreal, QC, CanadaHQ recorded Sep 21, 20261-107 contacts →

Exact match

“For all your accounting needs.If you don't necessarily love doing your taxes (or have an accounting degree), you've come to the right place.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10Exact matchMontreal, QC, CanadaHQ recorded Sep 21, 202611-506 contacts →

Exact match

“RSW is a full service firm of chartered professional accountants and advisors whose primary objective is to make a positive difference in our clients’ lives.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11Exact matchMontreal, QC, CanadaHQ recorded Sep 21, 202611-505 contacts →

Exact match

“Fondé en 1989 par Giovanni Barberio, notre cabinet d’experts-comptables se compose d’une équipe professionnelle, multidisciplinaire et dynamique qui, en collaboration avec notre…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12Exact matchMontreal, QC, CanadaHQ recorded Sep 21, 20261-105 contacts →

Exact match

“Full service chartered accounting firm with over 30 years of experience.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13Exact matchMontreal, QC, CanadaHQ recorded Sep 21, 20261-104 contacts →

Exact match

“At MLSG LLP, we are committed to offering professional services that will increase your bottom line and your net worth.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14Exact matchMontreal, QC, CanadaHQ recorded Sep 21, 20261-104 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15Exact matchMontreal, QC, CanadaHQ recorded Sep 21, 20261-104 contacts →

Exact match

“Nous sommes une firme de Comptable professionnel agréé basé à Montréal, notre champ d'expertise: Comptabilité, Audit / certification, Fiscalité, Services conseils.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16Exact matchMontreal, QC, CanadaHQ recorded Sep 21, 20261-103 contacts →

Exact match

“Notre cabinet vise à offrir un service de très haute qualité à un prix concurrentiel, qui est personnalisé aux besoins de nos clients.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17Exact matchMontreal, QC, CanadaHQ recorded Sep 21, 202611-502 contacts →

Exact match

“With a long history serving the Public Accounting community Services Offered Assurance and Accounting Taxation Estates and Trusts Forensics and Valuations Government Assistance…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

Showing 17 of 68 top accounting firms based in Montreal, Canada

See the full list, filter by size, metro and specialty, and access 2,334 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Top accounting firms based in Montreal, Canada at a glance

As of Sep 21, 2026
55.5%Verified-email coverage
61.8Average contacts per company
1-10Median size (employees)
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
42
11-50
13
51-200
8
201-500
2
1,001-5,000
2

Email recency for this list is measured across the whole Canada list rather than for Montreal, so it is reported there. Company counts and contact totals on this page are exact for Montreal, over 68 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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
Company records associated with Montreal, Canada whose business descriptions match “top accounting firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 2,334 professional contacts with verified work emails across the full matched dataset. 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 21, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “top accounting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many top accounting firms are there based in Montreal, Canada?

RevenueBase identified 68 company matches for top accounting firms associated with Montreal, Canada as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

PSB Boisjoli tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in Canada has the most top accounting firms?

Toronto leads Canada with 140 company records, followed by Calgary (77) and Mississauga (68). Montreal has 68.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 2,334 professional contacts with verified work emails tracked across these 68 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 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.