Company lists · Data verified August 2026

Top 25 List building services based in Ottawa, Canada

Name: List building services based in Ottawa, Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 87 companies tracked

There are 87 list building services headquartered in Ottawa, Canada (RevenueBase, August 2026). RevenueBase tracks 725 professional contacts across them, including 275 with verified work emails and 36 with mobile numbers. Toronto is the largest hub.

This list covers list building services 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.

87Companies

725Contacts tracked

275Verified emails

36Mobile numbers

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The 25 largest list building services based in Ottawa, Canada

Ranked by team size

Top 25 of 87 list building services 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	Inviro Engineered Systems LTD	Ottawa, ON	51-200	51	6
2	Figurr Architects Collective	Ottawa, ON	11-50	44	26
	RevenueBasePublisher of this directory	Boston, MA	n/a	n/a	Try free
3	Alliance Engineering & Construction LTD	Ottawa, ON	51-200	36	11
4	Amsted Design-Build	Ottawa, ON	11-50	30	25
5	Rojo Construction Management INC	Ottawa, ON	11-50	29	19
6	GRC Architects	Ottawa	11-50	24	10
7	Westview Projects INC	Ottawa, ON	11-50	22	17
8	Ashcroft Homes	Ottawa, ON	51-200	22	6
9	LCA	Ottawa, ON	11-50	20	11
10	Premium Construction	Ottawa, ON	11-50	20	7
11	PYE & Richards	Ottawa, ON	11-50	17	13
12	ZW Management INC	Ottawa, ON	11-50	17	7
13	KWC Architects INC	Ottawa, ON	11-50	16	12
14	Chmiel Architects	Ottawa, ON	11-50	16	10
15	Bradford Construction Ltd.	Ottawa, ON	11-50	16	7
16	Urbacity Design Build LTD	Ottawa, ON	11-50	15	9
17	Cunliffe & Associates INC	Ottawa, ON	11-50	13	11
18	D M Structural LTD	Ottawa, ON	1-10	11	10
19	Linebox Studio	Ottawa, ON	11-50	11	8
20	Lagois Design Build Renovate	Ottawa, ON	1-10	11	6
21	Graebeck Construction LTD	Ottawa, ON	11-50	8	6
22	RND Construction LTD	Ottawa, ON	11-50	7	4
23	Lalande Doyle Architects	Ottawa	11-50	7	3
24	Grandcor	Ottawa, ON	11-50	6	3
25	Argue Construction LTD	Ottawa, ON	11-50	6	3

Showing 25 of 87 list building services based in Ottawa, Canada

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List building services based in Ottawa, Canada at a glance

As of Aug 28, 2026

1-10Median size (employees)

TorontoLargest hub · 310 HQs

36Contacts with mobile numbers

3Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

List building services by metro in Canada

Metro	Companies
List building services in Toronto	310
List building services in Vancouver	137
List building services in Montreal	131
List building services in Calgary	116
List building services in Ottawa	87
List building services in Mississauga	84
List building services in Edmonton	70
List building services in Winnipeg	48

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 “list building services”, 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; 3 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 list building services are there based in Ottawa, Canada?

There are 87 list building services headquartered in Ottawa, Canada as of August 2026 (RevenueBase).

What is the largest company on this list?

Inviro Engineered Systems LTD, headquartered in Ottawa, tops this list with the largest team on record.

Which city has the most list building services?

Toronto leads with 310 headquartered companies, followed by Vancouver (137) and Montreal (131).

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 275 verified decision-maker contacts tracked across these 87 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.