Company lists · Data refreshed September 2026

Top 25 Geothermal consultants based in Toronto, Canada

Name: Geothermal consultants based in Toronto, Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 77 companies tracked

RevenueBase identified 77 geothermal consultants headquartered in Toronto, Canada as of September 2026 and tracks 882 professional contacts across them, including 379 with verified work emails. Calgary is the largest hub.

This list covers geothermal consultants 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 20, 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 20, 2026 86% judged on-target in blind review

77Companies

882Contacts tracked

379Verified emails

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The 25 largest geothermal consultants based in Toronto, Canada

Ranked by team size

Top 25 of 77 geothermal consultants based in Toronto, Canada, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to geothermal consultants: 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	Peto Maccallum Ltd. Consulting Engineers	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	51-200	158 contacts →
	Indirect evidence “PML is an independent, employee-owned Canadian professional engineering organization providing consulting services and expert technical assistance to a wide range of clients in…” Source: RevenueBase Database · checked Sep 20, 2026
2	Orix Geoscience INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	51-200	60 contacts →
	Indirect evidence “A geological firm advancing strategic exploration and mining, through the integration of data and innovative geological understanding.” Source: RevenueBase Database · checked Sep 20, 2026
3	The Mitchell Partnership Inc. NOW BPA	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	51-200	59 contacts →
	Indirect evidence “Founded in 1958 in Toronto, The Mitchell Partnership Inc.(TMP) is a mechanical building services consulting engineering practice.” Source: RevenueBase Database · checked Sep 20, 2026
4	Halyard INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	11-50	56 contacts →
	Indirect evidence “Technically Strong, Up for the Challenge Serving the mineral processing, water treatment and utility industries, Halyard offers its clients a team of multi-disciplinary engineers…” Source: RevenueBase Database · checked Sep 20, 2026
5	DGI Geoscience INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	51-200	45 contacts →
	Indirect evidence “DGI Geoscience is focused on providing excellence in our services and securing our position as an industry leader while delivering a fun and rewarding work atmosphere.” Source: RevenueBase Database · checked Sep 20, 2026
6	Diverso Energy	Partial evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	51-200	41 contacts →
	Partial evidence “Diverso Energy is North America’s first fully vertically integrated geothermal utility company, helping developers, building owners, and investors deliver low-carbon heating and…” Source: RevenueBase Database · checked Sep 20, 2026
7	Watts, Griffis And Mcouat Ltd. WGM	Partial evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	51-200	29 contacts →
	Partial evidence “Watts, Griffis and McOuat Limited ("WGM") is Canada's longest running independent firm of geological and mining consultants providing value-added professional services of the…” Source: RevenueBase Database · checked Sep 20, 2026
8	Micon International Limited	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	11-50	26 contacts →
	Indirect evidence “Since 1988, Micon International Limited has been a trusted provider of independent consulting services to the global mining industry.” Source: RevenueBase Database · checked Sep 20, 2026
9	Mann Engineering	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	11-50	14 contacts →
	Indirect evidence “Offering a broad range of consulting, engineering, procurement and construction services encompassing virtually all areas of the energy market, including HVAC, boilers, automation…” Source: RevenueBase Database · checked Sep 20, 2026
10	AGP Mining Consultants INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	11-50	11 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
11	Quwa Smart Services	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	1-10	11 contacts →
	Indirect evidence “Quwa Smart Services Inc (QSS) is a dynamic engineering consulting firm specializing in Energy Management, Decarbonization and Smart Technology Solutions.” Source: RevenueBase Database · checked Sep 20, 2026
12	Subterra Renewables	Partial evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	11-50	10 contacts →
	Partial evidence “Subterra Renewables develops and operates thermal district energy systems using the latest geothermal and heat recovery technology.” Source: RevenueBase Database · checked Sep 20, 2026
13	Watermark Environmental LTD	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	11-50	8 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
14	Compass Energy Consulting	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	1-10	7 contacts →
	Indirect evidence “Compass Energy Consulting (“Compass”) is a boutique management consulting firm that is focused on providing strategic, technical, financial, and development support to the…” Source: RevenueBase Database · checked Sep 20, 2026
15	Internat Energy Solutions Canada	Indirect evidence	Toronto, CanadaHQ checked Sep 20, 2026	51-200	7 contacts →
	Indirect evidence “Internat Energy Solutions Canada (IESC) was acquired by Dillon Consulting Limited in 2023.” Source: RevenueBase Database · checked Sep 20, 2026
16	Optimize Group INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	11-50	6 contacts →
	Indirect evidence “With agility and excellence, we deliver mining studies, operational support, due diligence, and small capital projects (up to 100 million CAPEX).” Source: RevenueBase Database · checked Sep 20, 2026
17	Alexana Engineering INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	1-10	5 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
18	Csei-Intron Engineering INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	11-50	5 contacts →
	Indirect evidence “CSEI - INTRON is a full service Mechanical & Electrical professional engineering firm specialized in construction building industry with projects including commercial buildings…” Source: RevenueBase Database · checked Sep 20, 2026
19	Underground Consulting	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	1-10	5 contacts →
	Indirect evidence “Underground Consulting Incorporated was founded in 1988 to offer services to municipal, contractor, developer and legal clients.” Source: RevenueBase Database · checked Sep 20, 2026
20	Sarafinchin Consulting Engineers Geotechnical Environmental Hydrogeology	Indirect evidence	Toronto, CanadaHQ checked Sep 20, 2026	11-50	5 contacts →
	Indirect evidence “Since 1984 SARAFINCHIN Associates Ltd.” Source: RevenueBase Database · checked Sep 20, 2026
21	Laszlo Energy Services	Partial evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	1-10	3 contacts →
	Partial evidence “Laszlo Energy Services is a consultancy providing independent expertise in the fields of urban energy, carbon emissions, low carbon technologies and energy policy.” Source: RevenueBase Database · checked Sep 20, 2026
22	Geobase Solutions GBS LTD	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	1-10	3 contacts →
	Indirect evidence “At GeoBase Solutions (GBS), we are proud to offer our clients an insightful and responsive consulting experience with exceptional service.” Source: RevenueBase Database · checked Sep 20, 2026
23	WJS Energy	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	1-10	3 contacts →
	Indirect evidence “At WJS, we utilize our in-depth knowledge and advanced analysis capabilities to support the design and optimization of new and existing buildings, with a specialization in energy…” Source: RevenueBase Database · checked Sep 20, 2026
24	Enliten	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	1-10	3 contacts →
	Indirect evidence “As Canada transitions to a low-carbon economy, we believe that sustainability will drive business growth in every sector.” Source: RevenueBase Database · checked Sep 20, 2026
25	Go-To Engineering INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 20, 2026	1-10	3 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 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: geothermal consultants. 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 geothermal consultants.
Partial evidence: Its own public description names part of geothermal consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name geothermal consultants. 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 77 geothermal consultants based in Toronto, Canada

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Geothermal consultants based in Toronto, Canada at a glance

As of Sep 20, 2026

43.0%Verified-email coverage

11.5Average contacts per company

1-10Median size (employees)

271.4%Largest-city concentration · Calgary

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 77 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 geothermal consultants, 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 “geothermal consultants”. 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 geothermal consultants), 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 geothermal consultants, 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, 379 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 20, 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.

Geothermal consultants 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 geothermal consultants, 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 geothermal consultants are there based in Toronto, Canada?

RevenueBase identified 77 geothermal consultants 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?

Peto Maccallum Ltd. Consulting Engineers, headquartered in Toronto, tops this list with the largest team on record.

Which city has the most geothermal consultants?

Calgary leads with 209 headquartered companies, followed by Toronto (77) and Vancouver (64).

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 379 verified decision-maker contacts tracked across these 77 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 20, 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.