Company lists · Data verified August 2026

Top 12 Bookkeeping outsourcing companies based in Ottawa, Canada

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 32 companies tracked

There are 32 bookkeeping outsourcing companies headquartered in Ottawa, Canada (RevenueBase, August 2026). RevenueBase tracks 110 professional contacts across them, including 43 with verified work emails and 11 with mobile numbers. Toronto is the largest hub.

This list covers bookkeeping outsourcing companies 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.

32Companies

110Contacts tracked

43Verified emails

11Mobile numbers

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The 12 largest bookkeeping outsourcing companies based in Ottawa, Canada

Ranked by team size

Top 12 of 32 bookkeeping outsourcing companies 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	Accountrain INC	Ottawa, ON	1-10	4	2
4	Elevate By Welch LLP	Ottawa, ON	201-500	4	1
5	Deltax Accounting & TAX Services INC	Ottawa, ON	1-10	4	1
6	Power Management INC	Ottawa	1-10	3	2
7	Balanced Solutions - CAS	Ottawa, ON	1-10	3	2
8	Vision Bookkeeping And Financial Services	Ottawa, ON	1-10	2	1
9	Dayani Castro Group Corp	Ottawa, ON	1-10	2	1
10	WP Mosher Bookkeeping	Ottawa, ON	n/a	2	1
11	Kirk CPA Professional Corporation	Ottawa	1-10	1	1
12	Finty INC	Ottawa, ON	1-10	1	1

Showing 12 of 32 bookkeeping outsourcing companies based in Ottawa, Canada

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Bookkeeping outsourcing companies based in Ottawa, Canada at a glance

As of Aug 28, 2026

1-10Median size (employees)

TorontoLargest hub · 109 HQs

11Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

201-500

Bookkeeping outsourcing companies by metro in Canada

Metro	Companies
Bookkeeping outsourcing companies in Toronto	109
Bookkeeping outsourcing companies in Calgary	89
Bookkeeping outsourcing companies in Vancouver	43
Bookkeeping outsourcing companies in Edmonton	37
Bookkeeping outsourcing companies in Mississauga	35
Bookkeeping outsourcing companies in Ottawa	33
Bookkeeping outsourcing companies in Winnipeg	23
Bookkeeping outsourcing companies in Surrey	21

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 “bookkeeping outsourcing companies”, 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 bookkeeping outsourcing companies are there based in Ottawa, Canada?

There are 32 bookkeeping outsourcing companies 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 bookkeeping outsourcing companies?

Toronto leads with 109 headquartered companies, followed by Calgary (89) and Vancouver (43).

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 43 verified decision-maker contacts tracked across these 32 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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Bookkeeping outsourcing companies by geography

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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.