Company lists · Data verified August 2026

Top 20 Accounting outsourcing firms based in Ottawa, Canada

Name: Accounting outsourcing firms based in Ottawa, Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 44 companies tracked

There are 44 accounting outsourcing firms headquartered in Ottawa, Canada (RevenueBase, August 2026). RevenueBase tracks 144 professional contacts across them, including 57 with verified work emails and 14 with mobile numbers. Toronto is the largest hub.

This list covers accounting outsourcing firms headquartered in Ottawa, Canada, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

44Companies

144Contacts tracked

57Verified emails

14Mobile numbers

Unlock all 44 companies Free account · no credit card · 2 minutes

The 20 largest accounting outsourcing firms based in Ottawa, Canada

Ranked by team size

Top 20 of 44 accounting outsourcing firms based in Ottawa, Canada, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	The Bookkeeping Bureau LTD	Ottawa, ON	11-50	20	18
2	Zenbooks	Ottawa, ON	11-50	18	12
3	The BM Group	Ottawa, ON	11-50	9	4
4	Numetrica	Ottawa, ON	1-10	6	1
5	Jordash Co. Ltee	Ottawa, ON	1-10	4	2
6	Accountrain INC	Ottawa, ON	1-10	4	2
7	Elevate By Welch LLP	Ottawa, ON	201-500	4	1
8	Deltax Accounting & TAX Services INC	Ottawa, ON	1-10	4	1
9	Power Management INC	Ottawa	1-10	3	2
10	Balanced Solutions - CAS	Ottawa, ON	1-10	3	2
11	Ind-Genuity Chartered Professional Accountants	Ottawa, ON	1-10	3	1
12	Revelo Consulting	Ottawa	1-10	2	2
13	Mcintyre & Associates Chartered Accountants	Ottawa, ON	1-10	2	2
14	Ducharme & Associates	Ottawa	1-10	2	1
15	Dayani Castro Group Corp	Ottawa, ON	1-10	2	1
16	Vision Bookkeeping And Financial Services	Ottawa, ON	1-10	2	1
17	WP Mosher Bookkeeping	Ottawa, ON	n/a	2	1
18	Performance Accounting Solutions	Ottawa, ON	1-10	1	1
19	Finty INC	Ottawa, ON	1-10	1	1
20	Kirk CPA Professional Corporation	Ottawa	1-10	1	1

Showing 20 of 44 accounting outsourcing firms based in Ottawa, Canada

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 57 reachable decision-makers.

Free account · no credit card

See all 44 companies

Accounting outsourcing firms based in Ottawa, Canada at a glance

As of Aug 28, 2026

1-10Median size (employees)

TorontoLargest hub · 168 HQs

14Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

201-500

Accounting outsourcing firms by metro in Canada

Metro	Companies
Accounting outsourcing firms in Toronto	168
Accounting outsourcing firms in Calgary	112
Accounting outsourcing firms in Vancouver	75
Accounting outsourcing firms in Montreal	71
Accounting outsourcing firms in Mississauga	62
Accounting outsourcing firms in Edmonton	55
Accounting outsourcing firms in Ottawa	44
Accounting outsourcing firms in Surrey	33

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “accounting outsourcing firms”, with match quality audited by blind human judging, and headquartered in Ottawa, Canada.
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: Contact records re-verify on a rolling cadence; 0 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

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

There are 44 accounting outsourcing firms headquartered in Ottawa, Canada as of August 2026 (RevenueBase).

What is the largest company on this list?

The Bookkeeping Bureau LTD, headquartered in Ottawa, tops this list with the largest team on record.

Which city has the most accounting outsourcing firms?

Toronto leads with 168 headquartered companies, followed by Calgary (112) and Vancouver (75).

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 57 verified decision-maker contacts tracked across these 44 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

Ready to reach these companies? Verified emails and direct dials for all 44 accounting outsourcing firms based in Ottawa, Canada. Start with a free account, no credit card.

Get the full list

Related lists

Accounting outsourcing firms by geography

Browse the directory

Browse: Companies home · Accounting outsourcing firms in Canada · All Canada lists · All Accounting outsourcing firms lists · New lists

About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.