Company lists · Data refreshed September 2026

Top 25 Decarbonization consultancies based in Indonesia

Name: Decarbonization consultancies based in Indonesia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 137 companies tracked

RevenueBase identified 137 decarbonization consultancies headquartered in Indonesia as of September 2026 and tracks 1,246 professional contacts across them, including 188 with verified work emails. Jakarta is the largest hub.

This list covers decarbonization consultancies headquartered in Indonesia, 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

137Companies

1,246Contacts tracked

188Verified emails

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The 25 largest decarbonization consultancies based in Indonesia

Ranked by team size

Top 25 of 137 decarbonization consultancies based in Indonesia, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to decarbonization 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	Institute For Essential Services Reform Iesr	Indirect evidence	Jakarta Selatan, IndonesiaHQ checked Sep 28, 2026	51-200	100 contacts →
	Indirect evidence “The Institute for Essential Services Reform (IESR) is a homegrown, prominent Indonesian think tank dedicated to accelerating the nation’s transition toward a low-carbon energy…” Source: RevenueBase Database · checked Sep 28, 2026
2	Fairatmos	Indirect evidence	Jakarta Selatan, IndonesiaHQ checked Sep 28, 2026	11-50	56 contacts →
	Indirect evidence “Meet Fairatmos.” Source: RevenueBase Database · checked Sep 28, 2026
3	Ailesh	Indirect evidence	Sleman, IndonesiaHQ checked Sep 28, 2026	11-50	42 contacts →
	Indirect evidence “Ailesh is dedicated to promoting sustainability through innovative, tailored solutions.” Source: RevenueBase Database · checked Sep 28, 2026
4	PT Peakglobal Resources Consulting Peakglobal	Indirect evidence	South Jakarta, IndonesiaHQ checked Sep 28, 2026	51-200	36 contacts →
	Indirect evidence “PT Peakglobal Resources Consulting (PEAKGLOBAL) is a international business and technical consulting firm headquartered out of Jakarta Indonesia with branch offices in Singapore…” Source: RevenueBase Database · checked Sep 28, 2026
5	PT Hexa Integra Electrica	Indirect evidence	Jakarta Selatan, IndonesiaHQ checked Sep 28, 2026	11-50	31 contacts →
	Indirect evidence “hire was established on 8 of August 2008 with the strategic intent of improving the competitiveness of domestic resources in power sector.” Source: RevenueBase Database · checked Sep 28, 2026
6	Gaia Indonesia	Indirect evidence	Jakarta Selatan, IndonesiaHQ checked Sep 28, 2026	11-50	31 contacts →
	Indirect evidence “Gaia Indonesia is a leading consultancy company specializing in sustainable commodities onforestry & palm oil sectors and in carbon project development on Nature & Technology…” Source: RevenueBase Database · checked Sep 28, 2026
7	Su-Re.co Sustainability & Resilience	Indirect evidence	Kabupaten Badung, IndonesiaHQ checked Sep 28, 2026	11-50	25 contacts →
	Indirect evidence “Sustainability and Resilience (su-re.co) is a newly established environmental consulting company based in Bali, Indonesia.” Source: RevenueBase Database · checked Sep 28, 2026
8	PT Abirama Prinsipa Indonesia	Indirect evidence	Jakarta Selatan, IndonesiaHQ checked Sep 28, 2026	11-50	25 contacts →
	Indirect evidence “Professional consultant for Solar PV, Oil and Gas, & Subsea Projects” Source: RevenueBase Database · checked Sep 28, 2026
9	Ecobuild Green Building Consultant	Indirect evidence	Jakarta, IndonesiaHQ checked Sep 28, 2026	11-50	21 contacts →
	Indirect evidence “Ecobuild is a professional consulting firm specialized in green building practice founded on the mission to solve the climate-related issue through green & sustainable building.” Source: RevenueBase Database · checked Sep 28, 2026
10	Geoenergis	Indirect evidence	Jakarta Selatan, IndonesiaHQ checked Sep 28, 2026	11-50	21 contacts →
	Indirect evidence “Geoenergis is an engineering and management consulting company in the field of energy and was officially established on November 5, 2020.” Source: RevenueBase Database · checked Sep 28, 2026
11	TRI Hita Consulting	Indirect evidence	Denpasar, IndonesiaHQ checked Sep 28, 2026	11-50	20 contacts →
	Indirect evidence “Tri Hita Consulting is a sustainability consulting firm based in Bali, serving both public and private sectors.” Source: RevenueBase Database · checked Sep 28, 2026
12	Synergy Efficiency Solutions	Indirect evidence	Jakarta Pusat, IndonesiaHQ checked Sep 28, 2026	11-50	18 contacts →
	Indirect evidence “About Synergy Efficiency Solutions Synergy Efficiency Solutions is a company founded on the principles of integrity and loyalty.” Source: RevenueBase Database · checked Sep 28, 2026
13	Enthalphy Environergy Consulting	Indirect evidence	Sleman Yogyakarta, IndonesiaHQ checked Sep 28, 2026	1-10	18 contacts →
	Indirect evidence “Enthalphy is an energy and environmental consulting firm that is committed to providing a positive impact through our services to achieve sustainability aspects, in terms of…” Source: RevenueBase Database · checked Sep 28, 2026
14	Trucarbon	Indirect evidence	Jakarta, IndonesiaHQ checked Sep 28, 2026	11-50	17 contacts →
	Indirect evidence “We were founded in 2022 as TruClimate.” Source: RevenueBase Database · checked Sep 28, 2026
15	Sustainahaus	Indirect evidence	South Jakarta, IndonesiaHQ checked Sep 28, 2026	11-50	15 contacts →
	Indirect evidence “Sustainahaus is a sustainability consultancy specialising in green building certification and ESG advisory across Asia Pacific.” Source: RevenueBase Database · checked Sep 28, 2026
16	Enercon Equipment Company	Indirect evidence	Jakarta, IndonesiaHQ checked Sep 28, 2026	11-50	15 contacts →
	Indirect evidence “PT.” Source: RevenueBase Database · checked Sep 28, 2026
17	Bestari Sustainability	Indirect evidence	South Jakarta, IndonesiaHQ checked Sep 28, 2026	11-50	11 contacts →
	Indirect evidence “Bestari Sustainability (PT Sumberdaya Dunia Lestari) is a private advisory and implementation partner to address critical challenges that the world must overcome in order to…” Source: RevenueBase Database · checked Sep 28, 2026
18	NOL Karbon	Indirect evidence	Jakarta, IndonesiaHQ checked Sep 28, 2026	11-50	7 contacts →
	Indirect evidence “Nol Karbon is a project developer specializing in carbon credits through planning, feasibility studies, carbon project implementation, carbon trading, and building a tech-based…” Source: RevenueBase Database · checked Sep 28, 2026
19	Mahardika Energy Partners	Indirect evidence	Jakarta, IndonesiaHQ checked Sep 28, 2026	1-10	5 contacts →
	Indirect evidence “Mahardika's vision is centered on transformation, innovation, and sustainability.” Source: RevenueBase Database · checked Sep 28, 2026
20	Geni Buana Nusantara	Indirect evidence	Jakarta Pusat, IndonesiaHQ checked Sep 28, 2026	1-10	5 contacts →
	Indirect evidence “Geni Energi is an engineering consultancy rooted in deep expertise and structured methodology.” Source: RevenueBase Database · checked Sep 28, 2026
21	GEO Rumbia	Indirect evidence	Jakarta Selatan, IndonesiaHQ checked Sep 28, 2026	1-10	5 contacts →
	Indirect evidence “We are an energy efficiency and sustainability consulting firm.” Source: RevenueBase Database · checked Sep 28, 2026
22	GWA Design Technology	Indirect evidence	Semarang, IndonesiaHQ checked Sep 28, 2026	11-50	4 contacts →
	Indirect evidence “Our Vision Become a consultant that prioritizes innovation and technology Our Mission We are committed to deliver qualified solution based on the principle of Science and…” Source: RevenueBase Database · checked Sep 28, 2026
23	PT Asian Delta Sagala	Indirect evidence	Jakarta Selatan, IndonesiaHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “PT.” Source: RevenueBase Database · checked Sep 28, 2026
24	Tanah AIR Bentala	Indirect evidence	Jakarta Selatan, IndonesiaHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “Perusahaan konsultan bidang pengembangan proyek dekarbonisasi sektor Energi dan FOLU” Source: RevenueBase Database · checked Sep 28, 2026
25	Muller Karbon Kapital	Indirect evidence	South Jakarta, IndonesiaHQ checked Sep 28, 2026	51-200	1 contacts →
	Indirect evidence “Muller Karbon Kapital Indonesia (Muller) is a company established in Indonesia in 2021.” 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: decarbonization 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 decarbonization consultancies.
Partial evidence: Its own public description names part of decarbonization consultancies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name decarbonization 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 137 decarbonization consultancies based in Indonesia

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Decarbonization consultancies based in Indonesia at a glance

As of Sep 28, 2026

15.1%Verified-email coverage

9.1Average contacts per company

11-50Median size (employees)

13.9%Largest-city concentration · Jakarta

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured worldwide rather than for Indonesia, so it is reported there. Company counts and contact totals on this page are exact for Indonesia, over 137 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 decarbonization 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 Indonesia whose own description of what they do matches “decarbonization 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 decarbonization 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 decarbonization consultancies, and records with no verified work email. Companies headquartered outside Indonesia 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, 188 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.

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 decarbonization 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 decarbonization consultancies are there based in Indonesia?

RevenueBase identified 137 decarbonization consultancies headquartered in Indonesia 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?

Institute For Essential Services Reform Iesr, headquartered in Dki Jakarta, tops this list with the largest team on record.

Which city has the most decarbonization consultancies?

Jakarta leads with 19 headquartered companies, followed by Dki Jakarta (13) and Jakarta Pusat (10).

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 188 verified decision-maker contacts tracked across these 137 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.