Company lists · Data refreshed September 2026

Top 25 Government affairs consultancies based in Ottawa, Canada

Name: Government affairs consultancies based in Ottawa, Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 44 companies tracked

RevenueBase identified 44 government affairs consultancies headquartered in Ottawa, Canada as of September 2026 and tracks 625 professional contacts across them, including 309 with verified work emails. Across Canada, Ottawa is the largest hub for this category.

This list covers government affairs consultancies 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

44Companies

625Contacts tracked

309Verified emails

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The 25 largest government affairs consultancies based in Ottawa, Canada

Ranked by team size

Top 25 of 44 government affairs consultancies based in Ottawa, Canada, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to government affairs consultancies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Earnscliffe Strategies	Indirect evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	51-200	84 contacts →
	Indirect evidence “Founded in 1989 and independently owned by our principals, Earnscliffe operates from offices in Ottawa-Gatineau, Toronto and Vancouver.” Source: RevenueBase Database · checked Sep 28, 2026
2	PAA Advisory Conseils	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	11-50	67 contacts →
	Partial evidence “PAA is a national public affairs and strategic communications firm.” Source: RevenueBase Database · checked Sep 28, 2026
3	Tactix Government Relations And Public Affairs	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	11-50	36 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 28, 2026
4	Mcmillan Vantage	Indirect evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	11-50	34 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 28, 2026
5	Impact Public Affairs Canada	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	11-50	28 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 28, 2026
6	Sandstone Group	Strong evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	1-10	24 contacts →
	Strong evidence “Sandstone Group Sandstone Group, based in Ottawa, specializes in providing strategic advice to corporate executives in matters of public affairs, government relations, crisis…” Source: RevenueBase Database · checked Sep 28, 2026
7	Bluesky Strategy Group INC	Strong evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	11-50	18 contacts →
	Strong evidence “Bluesky Strategy Group delivers public affairs, strategic communications, government relations, and media relations advice and execution.” Source: RevenueBase Database · checked Sep 28, 2026
8	Maple Leaf Strategies	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	11-50	16 contacts →
	Partial evidence “EXPERT Government Relations.” Source: RevenueBase Database · checked Sep 28, 2026
9	Blackbird Strategies	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	11-50	12 contacts →
	Partial evidence “Blackbird Strategies is a full-service, values-driven public affairs firm specializing in working with First Nations, businesses, associations, Indigenous communities, and others…” Source: RevenueBase Database · checked Sep 28, 2026
10	Prospectus Associates	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	1-10	12 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 28, 2026
11	3sixty Public Affairs	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	11-50	11 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 28, 2026
12	Arctech Accelerate	Indirect evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	11-50	11 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 28, 2026
13	First Lake Solutions	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	1-10	10 contacts →
	Partial evidence “First Lake Solutions provides associations, municipalities and corporations with effective government relations and media relations support.” Source: RevenueBase Database · checked Sep 28, 2026
14	Northstar Public Affairs	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	1-10	9 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 28, 2026
15	David Pratt & Associates	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	11-50	8 contacts →
	Partial evidence “David Pratt & Associates (DP & A), is a government relations and strategic consultancy firm located in Ottawa, Canada.” Source: RevenueBase Database · checked Sep 28, 2026
16	Winston Wilmont	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	1-10	7 contacts →
	Partial evidence “Winston Wilmont is a bespoke public affairs consultancy operating at the intersection of strategy, advocacy and communications.” Source: RevenueBase Database · checked Sep 28, 2026
17	Rkestra	Strong evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	1-10	6 contacts →
	Strong evidence “RKESTRA is a collective of senior public affairs, government relations, strategic communications, and business development professionals.” Source: RevenueBase Database · checked Sep 28, 2026
18	The Parliamentary Group	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	1-10	6 contacts →
	Partial evidence “Government Relations firm based in Ottawa, Canada.” Source: RevenueBase Database · checked Sep 28, 2026
19	Beacon North Strategies	Strong evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	1-10	5 contacts →
	Strong evidence “Cutting through the noise, we're Beacon North Strategies - a boutique public affairs firm specializing in strategy, government relations, stakeholder relations, events, and…” Source: RevenueBase Database · checked Sep 28, 2026
20	Constituent Manager Solutions	Indirect evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	11-50	5 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 28, 2026
21	KIT Public Affairs	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	1-10	4 contacts →
	Partial evidence “We’re an independent consulting firm that provides expert, affordable public and government relations services including: Advocacy Grants and Funding Support Policy Communications…” Source: RevenueBase Database · checked Sep 28, 2026
22	Monk Associates	Indirect evidence	Ottawa, CanadaHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “Experience.” Source: RevenueBase Database · checked Sep 28, 2026
23	Lighthouse Public Affairs Canada	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “Lighthouse Public Affairs is a boutique firms located in Canada's capital.” Source: RevenueBase Database · checked Sep 28, 2026
24	Connect Public Affairs	Strong evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	1-10	2 contacts →
	Strong evidence “Connect Public Affairs combines more than 20 years’ experience in government and politics with extensive research, competitive intelligence and strategic foresight to help…” Source: RevenueBase Database · checked Sep 28, 2026
25	NHM Connect	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 28, 2026	1-10	1 contacts →
	Partial evidence “NHM Connect is here to support you in building, maintaining and fostering an effective government and corporate relations strategy that develops and strengthens your…” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: government affairs consultancies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names government affairs consultancies.
Partial evidence: Its own public description names part of government affairs consultancies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name government affairs consultancies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 44 government affairs consultancies based in Ottawa, Canada

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Government affairs consultancies based in Ottawa, Canada at a glance

As of Sep 28, 2026

49.4%Verified-email coverage

14.2Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data 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 for Ottawa, so it is reported there. Company counts and contact totals on this page are exact for Ottawa, over 44 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 government affairs consultancies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, 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 “government affairs consultancies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names government affairs consultancies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among government affairs consultancies, 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 its RevenueBase Smart Search 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, 309 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 28, 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.

Government affairs consultancies by metro in Canada

Government affairs consultancies in Toronto42

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names government affairs consultancies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many government affairs consultancies are there based in Ottawa, Canada?

RevenueBase identified 44 government affairs consultancies 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 in Canada has the most government affairs consultancies?

Ottawa leads Canada with 44 headquartered companies, followed by Toronto (42) and Montreal (16).

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 309 verified decision-maker contacts tracked across these 44 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 28, 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 Smart Search, 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.