Company lists · Data refreshed September 2026

Top 25 Esg strategy consulting firms based in Toronto, Canada

Name: Esg strategy consulting firms based in Toronto, Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 335 companies tracked

RevenueBase identified 335 esg strategy consulting firms headquartered in Toronto, Canada as of September 2026 and tracks 1,647 professional contacts across them, including 697 with verified work emails. Across Canada, Toronto is the largest hub for this category.

This list covers esg strategy consulting firms headquartered in Toronto, 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 30, 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 30, 2026 86% judged on-target in blind review

335Companies

1,647Contacts tracked

697Verified emails

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The 25 largest esg strategy consulting firms based in Toronto, Canada

Ranked by team size

Top 25 of 335 esg strategy consulting firms based in Toronto, Canada, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to esg strategy consulting firms: 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	Optimus SBR	Partial evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	201-500	320 contacts →
	Partial evidence “Optimus SBR is Canada’s largest independent management consulting firm.” Source: RevenueBase Database · checked Sep 30, 2026
2	Quinn Partners	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	11-50	53 contacts →
	Indirect evidence “Quinn+Partners is a leading management consultancy specializing in corporate sustainability, sustainable finance, climate change and responsible investment advisory services.” Source: RevenueBase Database · checked Sep 30, 2026
3	Globescan	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	51-200	53 contacts →
	Indirect evidence “GlobeScan is a global insights and advisory firm specializing in trust, sustainability, and engagement.” Source: RevenueBase Database · checked Sep 30, 2026
4	Level5 Strategy	Strong evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	11-50	41 contacts →
	Strong evidence “Level5 Strategy is a leading boutique strategy consulting firm helping clients in complex organizations develop strategies that stick.” Source: RevenueBase Database · checked Sep 30, 2026
5	Footprint	Partial evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	11-50	37 contacts →
	Partial evidence “Footprint is a consulting practice comprised of a highly-specialized team of professionals dedicated entirely to sustainability.” Source: RevenueBase Database · checked Sep 30, 2026
6	Goldfin Consulting INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	11-50	31 contacts →
	Indirect evidence “Our clients want to do what they’re great at while becoming more sustainable, resilient, and competitive.” Source: RevenueBase Database · checked Sep 30, 2026
7	Weis L Retail Network Innovation	Partial evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	11-50	31 contacts →
	Partial evidence “WEIS is a consulting firm that specializes in Retail Network Innovation.” Source: RevenueBase Database · checked Sep 30, 2026
8	Ecovert Member Of BPA	Partial evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	11-50	29 contacts →
	Partial evidence “Ecovert is a full service sustainability consulting firm committed to creating economic, environmental and social synergies for the development sector.” Source: RevenueBase Database · checked Sep 30, 2026
9	CD Sonter LTD	Partial evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	11-50	28 contacts →
	Partial evidence “CD SONTER, an industry leader in sustainable solutions, provides waste auditing and environmental consulting, and project management of environmental awards and certifications.” Source: RevenueBase Database · checked Sep 30, 2026
10	Barnes Management Group	Partial evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	11-50	26 contacts →
	Partial evidence “Barnes Management Group (BMG) is a management consulting agency located in Toronto, Canada.” Source: RevenueBase Database · checked Sep 30, 2026
11	Left Lane Associates	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	11-50	22 contacts →
	Indirect evidence “North America's premier supply chain M&A experts that companies trust to drive their growth and exit plans.” Source: RevenueBase Database · checked Sep 30, 2026
12	Brooklin Consulting	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	11-50	19 contacts →
	Indirect evidence “We help clients - whether it is managing growth opportunities, introducing new technologies, fostering behavioural change or opening profit bottlenecks.” Source: RevenueBase Database · checked Sep 30, 2026
13	First North Consulting	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	51-200	16 contacts →
	Indirect evidence “Your competitive advantage is our proven track record in successfully advising Financial Services firms, including portfolio managers, pension funds, broker/dealers, global…” Source: RevenueBase Database · checked Sep 30, 2026
14	Clear Strategy	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	11-50	14 contacts →
	Indirect evidence “In today’s world, an organization’s ability to grow and innovate is shaped by an increasingly complex public affairs landscape that’s become more decentralized, more democratized…” Source: RevenueBase Database · checked Sep 30, 2026
15	DCS Global	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	11-50	13 contacts →
	Indirect evidence “At DCS Global, we support organizations across a wide range of industries and business sectors to achieve cleaner, healthier, more sustainable, cost-effective, and environmentally…” Source: RevenueBase Database · checked Sep 30, 2026
16	Energy Work INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	1-10	12 contacts →
	Indirect evidence “Energy@Work Inc.” Source: RevenueBase Database · checked Sep 30, 2026
17	J.C. Williams Group	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	11-50	11 contacts →
	Indirect evidence “J.C.” Source: RevenueBase Database · checked Sep 30, 2026
18	Plancatalyst	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	1-10	11 contacts →
	Indirect evidence “PlanCatalyst is a subsidiary of Plan International Canada that provides specialized consultancy services in international development and corporate sustainability.” Source: RevenueBase Database · checked Sep 30, 2026
19	Suslop INC	Partial evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	1-10	9 contacts →
	Partial evidence “Suslop is a management consulting firm.” Source: RevenueBase Database · checked Sep 30, 2026
20	Allen Leigh Human Capital	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	1-10	9 contacts →
	Indirect evidence “For over 15 years, Allen Leigh Human Capital has partnered with leaders and organizations to build the leadership, culture, and organizational capability needed to thrive in a…” Source: RevenueBase Database · checked Sep 30, 2026
21	Alcan Solutions	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	1-10	8 contacts →
	Indirect evidence “About Us At Alcan Solutions, we empower organizations with innovative Environmental, Health, and Safety (EHS) and sustainability management solutions.” Source: RevenueBase Database · checked Sep 30, 2026
22	ESG Global Advisors INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	11-50	8 contacts →
	Indirect evidence “As a trusted partner of both companies and investors, we are driven by an informed belief that Environmental, Social and Governance issues matter and that businesses that…” Source: RevenueBase Database · checked Sep 30, 2026
23	AA Impact INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	11-50	7 contacts →
	Indirect evidence “We specialize in guiding and transitioning Energy, Supply Chain and Financial Service businesses towards environmentally conscious and socially responsible practices.” Source: RevenueBase Database · checked Sep 30, 2026
24	Green Reason INC	Partial evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	1-10	7 contacts →
	Partial evidence “A sustainable building consulting and project management company.” Source: RevenueBase Database · checked Sep 30, 2026
25	Ryelle Strategy Group	Strong evidence	Toronto, ON, CanadaHQ checked Sep 30, 2026	11-50	7 contacts →
	Strong evidence “Boutique consulting firm dedicated to strategy, execution and transformation in public sector, NGOs and private sector around the world” Source: RevenueBase Database · checked Sep 30, 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: esg strategy consulting firms. 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 esg strategy consulting firms.
Partial evidence: Its own public description names part of esg strategy consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name esg strategy consulting firms. 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 335 esg strategy consulting firms based in Toronto, Canada

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Esg strategy consulting firms based in Toronto, Canada at a glance

As of Sep 30, 2026

42.3%Verified-email coverage

4.9Average contacts per company

1-10Median size (employees)

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

259

11-50

51-200

201-500

5,001-10,000

Email recency for this list is measured across the whole Canada list rather than for Toronto, so it is reported there. Company counts and contact totals on this page are exact for Toronto, over 335 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 esg strategy consulting firms, 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 Toronto, Canada whose own description of what they do matches “esg strategy consulting firms”. 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 esg strategy consulting firms), 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 esg strategy consulting firms, and records with no verified work email. Companies headquartered outside Toronto 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, 697 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 30, 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.

Esg strategy consulting firms by metro in Canada

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 esg strategy consulting firms, 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 esg strategy consulting firms are there based in Toronto, Canada?

RevenueBase identified 335 esg strategy consulting firms headquartered in Toronto, 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?

Optimus SBR, headquartered in Toronto, tops this list with the largest team on record.

Which city in Canada has the most esg strategy consulting firms?

Toronto leads Canada with 335 headquartered companies, followed by Montreal (159) and Calgary (130).

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 697 verified decision-maker contacts tracked across these 335 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 30, 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.