Company lists · Data verified August 2026

Top 25 Advocacy consulting firms based in Ottawa, Canada

Name: Advocacy consulting 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 58 companies tracked

There are 58 advocacy consulting firms headquartered in Ottawa, Canada (RevenueBase, August 2026). RevenueBase tracks 818 professional contacts across them, including 481 with verified work emails and 111 with mobile numbers. Toronto is the largest hub.

This list covers advocacy consulting 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.

58Companies

818Contacts tracked

481Verified emails

111Mobile numbers

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The 25 largest advocacy consulting firms based in Ottawa, Canada

Ranked by team size

Top 25 of 58 advocacy consulting 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	Strategycorp	Ottawa, ON	51-200	127	100
2	Enterprise Canada	Ottawa, ON	51-200	101	57
3	Earnscliffe Strategies	Ottawa, ON	51-200	78	59
4	Spark Advocacy	Ottawa, ON	11-50	40	23
5	Rubicon Strategy INC	Ottawa, ON	11-50	39	31
6	Mcmillan Vantage	Ottawa, ON	11-50	35	29
7	Compass Rose	Ottawa, ON	11-50	30	19
8	Sandstone Group	Ottawa, ON	1-10	23	15
9	Conway Baxter Wilson LLP S.R.L	Ottawa, ON	11-50	22	18
10	Temple Scott Associates INC	Ottawa, ON	11-50	19	12
11	Bluesky Strategy Group INC	Ottawa, ON	11-50	18	13
12	STIFF	Ottawa, ON	11-50	18	13
13	Clear Strategy	Ottawa, ON	11-50	13	9
14	3sixty Public Affairs	Ottawa, ON	11-50	12	11
15	Prospectus Associates	Ottawa, ON	1-10	12	5
16	Diplomat Consulting	Ottawa, ON	1-10	12	4
17	Arctech Accelerate	Ottawa, ON	11-50	11	6
18	First Lake Solutions	Ottawa, ON	1-10	10	7
19	Northstar Public Affairs	Ottawa, ON	1-10	9	7
20	Niva INC	Ottawa	11-50	7	6
21	The Portage Group	Ottawa, ON	1-10	7	5
22	Winston Wilmont	Ottawa, ON	1-10	7	5
23	Positivist Group	Ottawa, ON	1-10	6	4
24	The Parliamentary Group	Ottawa, ON	1-10	6	3
25	Constituent Manager Solutions	Ottawa, ON	11-50	5	2

Showing 25 of 58 advocacy consulting firms based in Ottawa, Canada

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Advocacy consulting firms based in Ottawa, Canada at a glance

As of Aug 28, 2026

1-10Median size (employees)

TorontoLargest hub · 101 HQs

111Contacts with mobile numbers

4Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

Advocacy consulting firms by metro in Canada

Metro	Companies
Advocacy consulting firms in Toronto	101
Advocacy consulting firms in Ottawa	58
Advocacy consulting firms in Montreal	42
Advocacy consulting firms in Vancouver	35
Advocacy consulting firms in Calgary	28
Advocacy consulting firms in Edmonton	9
Advocacy consulting firms in Saskatoon	8
Advocacy consulting firms in Quebec	7

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 “advocacy consulting 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; 4 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 advocacy consulting firms are there based in Ottawa, Canada?

There are 58 advocacy consulting firms headquartered in Ottawa, Canada as of August 2026 (RevenueBase).

What is the largest company on this list?

Strategycorp, headquartered in Ottawa, tops this list with the largest team on record.

Which city has the most advocacy consulting firms?

Toronto leads with 101 headquartered companies, followed by Ottawa (58) and Montreal (42).

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 481 verified decision-maker contacts tracked across these 58 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.