Company lists · Data verified August 2026

Top 12 Accounting process outsourcing providers based in Ottawa, Canada

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 25 companies tracked

There are 25 accounting process outsourcing providers headquartered in Ottawa, Canada (RevenueBase, August 2026). RevenueBase tracks 96 professional contacts across them, including 44 with verified work emails and 10 with mobile numbers. Toronto is the largest hub.

This list covers accounting process outsourcing providers 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.

25Companies

96Contacts tracked

44Verified emails

10Mobile numbers

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The 12 largest accounting process outsourcing providers based in Ottawa, Canada

Ranked by team size

Top 12 of 25 accounting process outsourcing providers 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	Jordash Co. Ltee	Ottawa, ON	1-10	4	2
4	Accountrain INC	Ottawa, ON	1-10	4	2
5	Elevate By Welch LLP	Ottawa, ON	201-500	4	1
6	Deltax Accounting & TAX Services INC	Ottawa, ON	1-10	4	1
7	Balanced Solutions - CAS	Ottawa, ON	1-10	3	2
8	Power Management INC	Ottawa	1-10	3	2
9	Ind-Genuity Chartered Professional Accountants	Ottawa, ON	1-10	3	1
10	Dayani Castro Group Corp	Ottawa, ON	1-10	2	1
11	WP Mosher Bookkeeping	Ottawa, ON	n/a	2	1
12	Kirk CPA Professional Corporation	Ottawa	1-10	1	1

Showing 12 of 25 accounting process outsourcing providers based in Ottawa, Canada

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Accounting process outsourcing providers based in Ottawa, Canada at a glance

As of Aug 28, 2026

1-10Median size (employees)

TorontoLargest hub · 88 HQs

10Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

201-500

Accounting process outsourcing providers by metro in Canada

Metro	Companies
Accounting process outsourcing providers in Toronto	88
Accounting process outsourcing providers in Calgary	59
Accounting process outsourcing providers in Vancouver	29
Accounting process outsourcing providers in Ottawa	25
Accounting process outsourcing providers in Edmonton	25
Accounting process outsourcing providers in Mississauga	22
Accounting process outsourcing providers in Surrey	17
Accounting process outsourcing providers in Quebec	17

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 process outsourcing providers”, 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 process outsourcing providers are there based in Ottawa, Canada?

There are 25 accounting process outsourcing providers 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 process outsourcing providers?

Toronto leads with 88 headquartered companies, followed by Calgary (59) and Vancouver (29).

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 44 verified decision-maker contacts tracked across these 25 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.

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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.