Company lists · Data refreshed September 2026

Top 25 Cleantech consulting firms based in Australia

Name: Cleantech consulting firms based in Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 270 companies tracked

RevenueBase identified 270 cleantech consulting firms headquartered in Australia as of September 2026 and tracks 1,825 professional contacts across them, including 779 with verified work emails. Melbourne is the largest hub.

This list covers cleantech consulting firms headquartered in Australia, 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 21, 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 21, 2026 86% judged on-target in blind review

270Companies

1,825Contacts tracked

779Verified emails

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The 25 largest cleantech consulting firms based in Australia

Ranked by team size

Top 25 of 270 cleantech consulting firms based in Australia, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to cleantech 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	EMM Consulting PTY Limited	Indirect evidence	St Leonards, AustraliaHQ checked Sep 21, 2026	201-500	361 contacts →
	Indirect evidence “At EMM, we believe that a sustainable future is achievable, and we are dedicated to helping our clients and the community make it a reality.” Source: RevenueBase Database · checked Sep 21, 2026
2	Earth Systems	Indirect evidence	Port Melbourne, AustraliaHQ checked Sep 21, 2026	51-200	101 contacts →
	Indirect evidence “At Earth Systems, we believe that solving the world’s environmental challenges requires more than just knowledge-it takes innovation and action.” Source: RevenueBase Database · checked Sep 21, 2026
3	ITP Renewables	Indirect evidence	Canberra, AustraliaHQ checked Sep 21, 2026	11-50	39 contacts →
	Indirect evidence “ITP Renewables is Australia’s longest-running, independent, renewable energy consultancy.” Source: RevenueBase Database · checked Sep 21, 2026
4	Wolfpeak	Partial evidence	Port Macquarie, AustraliaHQ checked Sep 21, 2026	11-50	36 contacts →
	Partial evidence “We offer specialist consulting and project services, solving complex strategic and systematic issues across the environmental, natural resource, planning, sustainability, policy…” Source: RevenueBase Database · checked Sep 21, 2026
5	Renewables Technical Services	Indirect evidence	Bondi Junction, AustraliaHQ checked Sep 21, 2026	51-200	34 contacts →
	Indirect evidence “At RTS, we are dedicated to powering a sustainable future for Australia.” Source: RevenueBase Database · checked Sep 21, 2026
6	Gaia Resources	Indirect evidence	Perth, AustraliaHQ checked Sep 21, 2026	11-50	26 contacts →
	Indirect evidence “Gaia Resources is a consultancy that responsibly delivers sustainable technology solutions to make the world a better place.” Source: RevenueBase Database · checked Sep 21, 2026
7	Envaica	Indirect evidence	Cockburn Central, AustraliaHQ checked Sep 21, 2026	1-10	26 contacts →
	Indirect evidence “Rebranded and found in 2022 by senior industry professionals and electrical engineers who have over 30 years of experiences in ESG, Renewable Energy, stand-alone Offgrid Solar PV…” Source: RevenueBase Database · checked Sep 21, 2026
8	Arche Energy	Indirect evidence	Fortitude Valley, AustraliaHQ checked Sep 21, 2026	11-50	23 contacts →
	Indirect evidence “Arche Energy is a clean energy, power and infrastructure advisory providing a depth of experience to the investment community as it develops and executes clean energy, power…” Source: RevenueBase Database · checked Sep 21, 2026
9	Dartmouth Consulting	Partial evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	11-50	22 contacts →
	Partial evidence “At Dartmouth Consulting, we believe that success is achieved through the integration of sustainability, engagement, commercial outcomes and effective implementation throughout…” Source: RevenueBase Database · checked Sep 21, 2026
10	Zephyr Environmental	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	20 contacts →
	Partial evidence “Zephyr is an environmental consulting practice specialising in air emissions and carbon management.” Source: RevenueBase Database · checked Sep 21, 2026
11	Energylink Services PTY LTD	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	18 contacts →
	Indirect evidence “EnergyLink Services is a multi-disciplinary, specialist, energy and carbon consultancy and project developer.” Source: RevenueBase Database · checked Sep 21, 2026
12	Infostatus	Indirect evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	11-50	17 contacts →
	Indirect evidence “At Infostatus, we translate complex technology into accessible, tailored services that help organisations rethink how they work.” Source: RevenueBase Database · checked Sep 21, 2026
13	Future-Plus Environmental	Indirect evidence	Warana, AustraliaHQ checked Sep 21, 2026	11-50	16 contacts →
	Indirect evidence “Expert Environmental Planners, Environmental Scientists and Environmental Engineering.” Source: RevenueBase Database · checked Sep 21, 2026
14	Energy & Management Services	Indirect evidence	Warners Bay, AustraliaHQ checked Sep 21, 2026	11-50	15 contacts →
	Indirect evidence “EMS is an energy consultancy specialising in providing assistance to commercial and industrial clients, agribusinesses, mines, as well as small/medium enterprises in their…” Source: RevenueBase Database · checked Sep 21, 2026
15	Cogency Australia	Indirect evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	11-50	13 contacts →
	Indirect evidence “Cogency is a climate focused planning, environmental assessment and engagement consultancy, helping like-minded clients make complex projects simpler.” Source: RevenueBase Database · checked Sep 21, 2026
16	ENHAR	Indirect evidence	Fitzroy North, AustraliaHQ checked Sep 21, 2026	11-50	13 contacts →
	Indirect evidence “Our mission is to raise the standard of the solar and smart energy industry through excellence in project development, engineering and quality management.” Source: RevenueBase Database · checked Sep 21, 2026
17	Stride Renewables	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	13 contacts →
	Indirect evidence “With our independent analytical, commercial and strategic capabilities, we guide our partners to identify opportunities, solve complex problems and unlock growth in the renewable…” Source: RevenueBase Database · checked Sep 21, 2026
18	Fichtner Australia	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	13 contacts →
	Indirect evidence “The Fichtner Group is one of the leading independent engineering consultancy firms in the world.” Source: RevenueBase Database · checked Sep 21, 2026
19	Regen Strategic	Indirect evidence	Perth, AustraliaHQ checked Sep 21, 2026	11-50	13 contacts →
	Indirect evidence “We deliver more, to make a difference.” Source: RevenueBase Database · checked Sep 21, 2026
20	The Environmental Factor	Indirect evidence	Rockley Mount, AustraliaHQ checked Sep 21, 2026	1-10	13 contacts →
	Indirect evidence “We bring together a diverse and highly-skilled team offering a range of environmental services to suit any project.” Source: RevenueBase Database · checked Sep 21, 2026
21	Helixos	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	10 contacts →
	Partial evidence “We work with startups, research organisations, investors, governments, and end users to commercialise cleantech and implement it through business strategy, communications, and…” Source: RevenueBase Database · checked Sep 21, 2026
22	Blue Environment PTY LTD	Partial evidence	Docklands, AustraliaHQ checked Sep 21, 2026	1-10	10 contacts →
	Partial evidence “Blue Environment is an Australian environmental consulting company specialising in strategic advisory services.” Source: RevenueBase Database · checked Sep 21, 2026
23	Nrg-One	Indirect evidence	Toowoomba, AustraliaHQ checked Sep 21, 2026	1-10	10 contacts →
	Indirect evidence “We help businesses increase operating margins and cut emissions through tailored energy solutions that deliver measurable results.” Source: RevenueBase Database · checked Sep 21, 2026
24	Be&r Consulting	Indirect evidence	Perth, AustraliaHQ checked Sep 21, 2026	11-50	9 contacts →
	Indirect evidence “BE & R are a supplier of choice for sustainable energy solutions throughout Asia Pacific.” Source: RevenueBase Database · checked Sep 21, 2026
25	Ėcologiq Group	Indirect evidence	Chadstone, AustraliaHQ checked Sep 21, 2026	11-50	9 contacts →
	Indirect evidence “Ecologiq Group \| Engineering.” Source: RevenueBase Database · checked Sep 21, 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: cleantech 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 cleantech consulting firms.
Partial evidence: Its own public description names part of cleantech consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cleantech 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 270 cleantech consulting firms based in Australia

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Cleantech consulting firms based in Australia at a glance

As of Sep 21, 2026

42.7%Verified-email coverage

6.8Average contacts per company

1-10Median size (employees)

16.7%Largest-city concentration · Melbourne

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

204

11-50

51-200

201-500

501-1,000

Email recency for this list is measured worldwide rather than for Australia, so it is reported there. Company counts and contact totals on this page are exact for Australia, over 270 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 cleantech 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 Australia whose own description of what they do matches “cleantech 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 cleantech 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 cleantech consulting firms, and records with no verified work email. Companies headquartered outside Australia 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, 779 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 21, 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.

Cleantech consulting firms by metro

Cleantech consulting firms in Melbourne45
Cleantech consulting firms in Sydney35
Cleantech consulting firms in Brisbane28

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 cleantech 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 cleantech consulting firms are there based in Australia?

RevenueBase identified 270 cleantech consulting firms headquartered in Australia 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?

EMM Consulting PTY Limited, headquartered in St Leonards, tops this list with the largest team on record.

Which city has the most cleantech consulting firms?

Melbourne leads with 45 headquartered companies, followed by Sydney (35) and Brisbane (28).

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 779 verified decision-maker contacts tracked across these 270 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 21, 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.