Company lists · Data refreshed September 2026

Top 25 Public affairs consulting firms based in Ottawa, Canada

Name: Public affairs consulting firms based in Ottawa, Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 55 companies tracked

RevenueBase identified 55 public affairs consulting firms headquartered in Ottawa, Canada as of September 2026 and tracks 734 professional contacts across them, including 371 with verified work emails. Toronto is the largest hub.

This list covers public affairs 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. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 5, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

55Companies

734Contacts tracked

371Verified emails

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The 25 largest public affairs consulting firms based in Ottawa, Canada

Ranked by team size

Top 25 of 55 public affairs consulting firms based in Ottawa, Canada, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names public affairs consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Earnscliffe StrategiesIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	51-200	84
	“Founded in 1989 and independently owned by our principals, Earnscliffe operates from offices in Ottawa-Gatineau, Toronto and Vancouver.” Source: company website · checked Sep 5, 2026
2	PAA Advisory ConseilsStrong evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	67
	“PAA is a national public affairs and strategic communications firm.” Source: company website · checked Sep 5, 2026
3	Spark AdvocacyIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	41
	“To open minds, you need a clear thought.” Source: company website · checked Sep 5, 2026
4	Tactix Government Relations And Public AffairsIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	36
	“For over 25 years TACTIX has been a trusted advisor to leading Canadian and Fortune 500 companies, offering unparalleled experience in solving complex government relations threats…” Source: company website · checked Sep 5, 2026
5	Mcmillan VantageIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	34
	“When you have a pressing challenge, McMillan Vantage has the senior expertise with a deep understanding of what you need to know, when you need it most.” Source: company website · checked Sep 5, 2026
6	Compass RoseStrong evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	30
	“Compass Rose is a public affairs firm where helping companies and organizations find the common good is at the core of who we are and what we do.” Source: company website · checked Sep 5, 2026
7	Impact Public Affairs CanadaStrong evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	28
	“Building relationships for over 25 years, Impact Public Affairs is a full-service Canadian firm, based in Ottawa with offices in Toronto, Montreal, Vancouver, Calgary, and Halifax.” Source: company website · checked Sep 5, 2026
8	Sandstone GroupStrong evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	1-10	24
	“Sandstone Group Sandstone Group, based in Ottawa, specializes in providing strategic advice to corporate executives in matters of public affairs, government relations, crisis…” Source: company website · checked Sep 5, 2026
9	Bluesky Strategy Group INCStrong evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	18
	“Bluesky Strategy Group delivers public affairs, strategic communications, government relations, and media relations advice and execution.” Source: company website · checked Sep 5, 2026
10	Maple Leaf StrategiesIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	16
	“EXPERT Government Relations.” Source: company website · checked Sep 5, 2026
11	Blackbird StrategiesStrong evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	12
	“Blackbird Strategies is a full-service, values-driven public affairs firm specializing in working with First Nations, businesses, associations, Indigenous communities, and others…” Source: company website · checked Sep 5, 2026
12	Prospectus AssociatesStrong evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	1-10	12
	“Prospectus Associates is one of Canada’s leading national public affairs consulting firms that prides itself on delivering high-end personalized service by experienced…” Source: company website · checked Sep 5, 2026
13	3sixty Public AffairsStrong evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	11
	“3Sixty Public Affairs, with consultants in Western Canada, Ontario and Québec, is Canada's leader in health sector-focused policy, public affairs and advocacy.” Source: company website · checked Sep 5, 2026
14	Arctech AcceleratePartial evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	11
	“Headquartered in our nation’s capital, Arctech Accelerate is a Canadian management consulting and lobbying firm specializing in helping small and mid-sized businesses navigate…” Source: company website · checked Sep 5, 2026
15	First Lake SolutionsIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	1-10	10
	“First Lake Solutions provides associations, municipalities and corporations with effective government relations and media relations support.” Source: company website · checked Sep 5, 2026
16	Northstar Public AffairsStrong evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	1-10	9
	“NorthStar Public Affairs is a boutique public affairs agency which services those in need of smart, effective strategies and support for navigating Canadian politics and…” Source: company website · checked Sep 5, 2026
17	Niva INCIndirect evidence	Ottawa, CanadaHQ checked Sep 5, 2026	11-50	7
	“NIVA helps organizations and companies to engage their audience and tell their story so they can mobilize knowledge, solve problems, influence outcomes, and win markets.” Source: company website · checked Sep 5, 2026
18	ONE PersuasionPartial evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	1-10	7
	“ONE is a high-stakes, national, public strategy firm.” Source: company website · checked Sep 5, 2026
19	Winston WilmontStrong evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	1-10	7
	“Winston Wilmont is a bespoke public affairs consultancy operating at the intersection of strategy, advocacy and communications.” Source: company website · checked Sep 5, 2026
20	RkestraStrong evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	1-10	6
	“RKESTRA is a collective of senior public affairs, government relations, strategic communications, and business development professionals.” Source: company website · checked Sep 5, 2026
21	The Parliamentary GroupIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	1-10	6
	“Government Relations firm based in Ottawa, Canada.” Source: company website · checked Sep 5, 2026
22	Pendulum GroupIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	1-10	5
	“Canada's premier communications firm.” Source: company website · checked Sep 5, 2026
23	Beacon North StrategiesStrong evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	1-10	5
	“Cutting through the noise, we're Beacon North Strategies - a boutique public affairs firm specializing in strategy, government relations, stakeholder relations, events, and…” Source: company website · checked Sep 5, 2026
24	Constituent Manager SolutionsIndirect evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	11-50	5
	“Located in the heart of Canada's capital just minutes away from Parliament Hill, Constituent Manager Solutions provides advisory, communications, digital, data management and…” Source: company website · checked Sep 5, 2026
25	KIT Public AffairsStrong evidence	Ottawa, ON, CanadaHQ checked Sep 5, 2026	1-10	4
	“We’re an independent consulting firm that provides expert, affordable public and government relations services including: Advocacy Grants and Funding Support Policy Communications…” Source: company website · checked Sep 5, 2026

Showing 25 of 55 public affairs consulting firms based in Ottawa, Canada

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Public affairs consulting firms based in Ottawa, Canada at a glance

As of Sep 5, 2026

1-10Median size (employees)

TorontoLargest hub · 71 HQs

Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured across the whole Canada list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Ottawa, over 55 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among public affairs consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Ottawa, Canada whose own description of what they do matches “public affairs consulting firms”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among public affairs consulting firms, and records with no verified work email. Companies headquartered outside Ottawa are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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: Every listed company carries at least one verified work email, 371 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 5, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Public affairs consulting firms by metro in Canada

Public affairs consulting firms in Toronto71
Public affairs consulting firms in Ottawa55
Public affairs consulting firms in Montreal29
Public affairs consulting firms in Calgary26

Frequently asked

How many public affairs consulting firms are there based in Ottawa, Canada?

RevenueBase identified 55 public affairs consulting firms headquartered in Ottawa, Canada as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

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

Which city has the most public affairs consulting firms?

Toronto leads with 71 headquartered companies, followed by Ottawa (55) and Montreal (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 371 verified decision-maker contacts tracked across these 55 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 5, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 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 with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.