Company lists · Data refreshed September 2026

Top 17 Tax service providers based in Ottawa, Canada

RevenueBase identified 49 company matches for tax service providers associated with Ottawa, Canada as of September 2026 and tracks 315 professional contacts across them, including 136 with verified work emails. Across Canada, Toronto is the largest hub for this category (155 companies); Ottawa has 49.

This list covers company matches for tax service providers associated with Ottawa, 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 22, 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 22, 2026 How this list was built
49Companies
315Contacts tracked
136Verified emails
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The 17 largest tax service providers based in Ottawa, Canada

Ranked by team size
Top 17 of 49 company matches for tax service providers based in Ottawa, Canada, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 22, 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 matchOttawa, ON, CanadaHQ recorded Sep 22, 202651-20094 contacts →

Exact match

“GGFL is the tax planning and accounting firm for Ottawa’s successful business people.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
2Exact matchOttawa, ON, CanadaHQ recorded Sep 22, 202651-20080 contacts →

Exact match

“At Baker Tilly Ottawa LLP, we provide expert tax, assurance, and entrepreneurial services to help your business grow and prosper.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
3Exact matchOttawa, ON, CanadaHQ recorded Sep 22, 202611-5013 contacts →

Exact match

“AI Tax Consultants specializes in delivering tax and accounting services to individuals, self-employed and corporations.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
4Exact matchOttawa, ON, CanadaHQ recorded Sep 22, 202611-508 contacts →

Exact match

“Vaive and Associates Professional Corporation is a tax consulting, business advisory and accounting firm.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
5Exact matchOttawa, ON, CanadaHQ recorded Sep 22, 20261-108 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
6Exact matchOttawa, ON, CanadaHQ recorded Sep 22, 20261-105 contacts →

Exact match

“We are a cloud-based accounting firm.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
7Exact matchOttawa, ON, CanadaHQ recorded Sep 22, 202611-505 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
8Exact matchOttawa, ON, CanadaHQ recorded Sep 22, 20261-104 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
9Exact matchOttawa, ON, CanadaHQ recorded Sep 22, 2026201-5004 contacts →

Exact match

“Elevate by Welch LLP is designed as a one-stop shop for all your accounting needs.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
10Exact matchOttawa, ON, CanadaHQ recorded Sep 22, 20261-103 contacts →

Exact match

“Comptabilité pour entreprises et particuliers.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
11Exact matchOttawa, CanadaHQ recorded Sep 22, 20261-102 contacts →

Exact match

“Ducharme & Associates Inc.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
12Exact matchOttawa, ON, CanadaHQ recorded Sep 22, 20261-102 contacts →

Exact match

“We are a small group of accountants that work to provide our customers with timely and accurate accounting services.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
13Exact matchOttawa, ON, CanadaHQ recorded Sep 22, 20261-102 contacts →

Exact match

“Accounting Services, Tax Services, Finance, Economics, Tutor, Payroll Services, Bookkeeping services”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
14Exact matchOttawa, ON, CanadaHQ recorded Sep 22, 20261-101 contacts →

Exact match

“Ledgers Professionals provide a comprehensive suite of services to small business, their owners and the general public.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
15Exact matchOttawa, ON, CanadaHQ recorded Sep 22, 20261-101 contacts →

Exact match

“United States and Canadian individual and corporate taxes”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
16Exact matchOttawa, ON, CanadaHQ recorded Sep 22, 20261-101 contacts →

Exact match

“ibma Accounting is your wise choice!”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
17Exact matchOttawa, ON, CanadaHQ recorded Sep 22, 20261-101 contacts →

Exact match

“Kanata Tax Services delivers the highest standards of accounting and taxation solutions.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase

Showing 17 of 49 tax service providers based in Ottawa, Canada

See the full list, filter by size, metro and specialty, and access 136 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Tax service providers based in Ottawa, Canada at a glance

As of Sep 22, 2026
43.2%Verified-email coverage
6.4Average contacts per company
1-10Median size (employees)
Sep 22, 2026Page data refreshed

Companies by employee count

1-10
41
11-50
5
51-200
2
201-500
1

Email recency for this list is measured across the whole Canada list rather than for Ottawa, so it is reported there. Company counts and contact totals on this page are exact for Ottawa, over 49 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 Ottawa, Canada whose business descriptions match “tax service providers” 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 136 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 22, 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 “tax service providers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many tax service providers are there based in Ottawa, Canada?

RevenueBase identified 49 company matches for tax service providers associated with Ottawa, 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?

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

Which city in Canada has the most tax service providers?

Toronto leads Canada with 155 company records, followed by Calgary (111) and Mississauga (110). Ottawa has 49.

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 136 professional contacts with verified work emails tracked across these 49 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 22, 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.