Company lists · Data refreshed September 2026

Top 25 Private client accounting firms based in Ottawa, Canada

Name: Private client accounting firms based in Ottawa, Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 94 companies tracked

RevenueBase identified 94 private client accounting firms headquartered in Ottawa, Canada as of September 2026 and tracks 1,356 professional contacts across them, including 688 with verified work emails. Toronto is the largest hub.

This list covers private client accounting firms headquartered in Ottawa, 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

94Companies

1,356Contacts tracked

688Verified emails

Explore all 94 companies → Free signup · no credit card · 500 free credits

The 25 largest private client accounting firms based in Ottawa, Canada

Ranked by team size

Top 25 of 94 private client accounting firms based in Ottawa, Canada, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names private client accounting 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	Welch LLPPartial 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
2	Marcil LavalléePartial evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	51-200	109
	“Marcil Lavallée est un partenaire engagé qui contribue activement à la réussite de ses clients en anticipant leurs besoins et en leur offrant une gamme complète de solutions…” Source: company website · checked Sep 5, 2026
3	Ggfl LLPPartial evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	51-200	94
	“GGFL is the tax planning and accounting firm for Ottawa’s successful business people.” Source: company website · checked Sep 5, 2026
4	Logan Katz LLPStrong evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	51-200	80
	“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: company website · checked Sep 5, 2026
5	Baker Tilly Ottawa LLPIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	51-200	80
	“At Baker Tilly Ottawa LLP, we provide expert tax, assurance, and entrepreneurial services to help your business grow and prosper.” Source: company website · checked Sep 5, 2026
6	Mccay Duff LLPIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	51-200	66
	“McCay Duff LLP is a full-service Chartered Accountants Firm that has been serving the Ottawa area since 1946.” Source: company website · checked Sep 5, 2026
7	Lekadir LLPPartial evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	51-200	47
	“Lekadir LLP is a Chartered Professional Accounting firm providing a full range of accounting, assurance, tax, and advisory services.” Source: company website · checked Sep 5, 2026
8	TAAGPartial evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	51-200	39
	“Accounting + Tax • Law • Wealth Family Office • Marketing + Design” Source: company website · checked Sep 5, 2026
9	Capcorp FinancialIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	37
	“Capcorp Financial is a Canadian advisory firm built on one simple belief: good advice changes lives.” Source: company website · checked Sep 5, 2026
10	Connelly & Koshy Professional CorporationPartial evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	33
	“Chartered Professional Accountants licensed to practice in Ontario and Quebec with offices in Ottawa and Shawville Practice areas- Accounting - Auditing of profit oriented…” Source: company website · checked Sep 5, 2026
11	OnelifeIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	15
	“OneLife is solutions oriented in every respect.” Source: company website · checked Sep 5, 2026
12	AI TAX ConsultantsPartial evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	13
	“AI Tax Consultants specializes in delivering tax and accounting services to individuals, self-employed and corporations.” Source: company website · checked Sep 5, 2026
13	Ecivda Financial Planning BoutiqueIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	11
	“We specialize in helping growth-minded individuals, business owners, & entrepreneurs in the areas of individual and corporate wealth, investment, employee, and estate planning.” Source: company website · checked Sep 5, 2026
14	Vaive And Associates Professional CorporationPartial evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	8
	“Vaive and Associates Professional Corporation is a tax consulting, business advisory and accounting firm.” Source: company website · checked Sep 5, 2026
15	Armstrong Jones LLPPartial evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	1-10	8
	“Armstrong Jones LLP is an accounting firm based in Ottawa, Ontario that offers services in accounting, audit and assurance, tax planning and compliance, and a wide array of…” Source: company website · checked Sep 5, 2026
16	Crosspoint Financial IA Private Wealth INCPartial evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	1-10	8
	“CrossPoint Financial is a full-service, boutique asset management and financial planning team in Ottawa dedicated to providing superior wealth management for our clients over…” Source: company website · checked Sep 5, 2026
17	Ryan Lamontagne INCIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	7
	Source: company website · checked Sep 5, 2026
18	Paterson & CompanyPartial evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	7
	“Similar to most CPA firms, we bring extensive income tax and financial statement preparation experience to our clients.” Source: company website · checked Sep 5, 2026
19	L. Zinman & CompanyIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	1-10	6
	“L.” Source: company website · checked Sep 5, 2026
20	Boyer & Boyer, CPAIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	6
	“Managing your own financial affairs is overwhelming and time-consuming!” Source: company website · checked Sep 5, 2026
21	Capital PRO GroupIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	1-10	6
	“Estate Planning Retirement Planning Educational Planning RRSP, TFSA, RRIF More.” Source: company website · checked Sep 5, 2026
22	Synapse Accounting GroupPartial evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	1-10	5
	“We are a cloud-based accounting firm.” Source: company website · checked Sep 5, 2026
23	Leslie & Macleod, Chartered Accountants CpasIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	5
	Source: company website · checked Sep 5, 2026
24	Mirabel Management INCIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	1-10	5
	“At Mirabel Management, we take a personal and holistic approach to financial planning, ensuring that every aspect of your needs is thoughtfully assessed before crafting a…” Source: company website · checked Sep 5, 2026
25	Your Private CFO Family Wealth IapwIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	1-10	5
	“Entrepreneurs, Executives & Business Owners.you've been told your whole life to allocate your assets a certain way, right?” Source: company website · checked Sep 5, 2026

Showing 25 of 94 private client accounting firms based in Ottawa, Canada

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Private client accounting firms based in Ottawa, Canada at a glance

As of Sep 5, 2026

1-10Median size (employees)

TorontoLargest hub · 377 HQs

Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

10001+

Email recency for this list is measured across the whole Canada list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Ottawa, over 94 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 private client accounting 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 Ottawa, Canada whose own description of what they do matches “private client accounting 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 private client accounting firms, and records with no verified work email. Companies headquartered outside Ottawa 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, 688 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.

Private client accounting firms by metro in Canada

Frequently asked

How many private client accounting firms are there based in Ottawa, Canada?

RevenueBase identified 94 private client accounting firms headquartered in Ottawa, 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?

Welch LLP, headquartered in Ottawa, tops this list with the largest team on record.

Which city has the most private client accounting firms?

Toronto leads with 377 headquartered companies, followed by Calgary (219) and Vancouver (184).

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 688 verified decision-maker contacts tracked across these 94 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.