Company lists · Data refreshed September 2026

Top 25 Energy efficiency consultancies based in India

Name: Energy efficiency consultancies based in India
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 276 companies tracked

RevenueBase identified 276 energy efficiency consultancies headquartered in India as of September 2026 and tracks 2,791 professional contacts across them, including 600 with verified work emails. Pune is the largest hub.

This list covers energy efficiency consultancies headquartered in India, 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

276Companies

2,791Contacts tracked

600Verified emails

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The 25 largest energy efficiency consultancies based in India

Ranked by team size

Top 25 of 276 energy efficiency consultancies based in India, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to energy efficiency 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	D2o	Strong evidence	Jaipur, IndiaHQ checked Sep 28, 2026	51-200	217 contacts →
	Strong evidence “Design2Occupancy Services LLP (D2O) is a leading organization providing a platform and solutions in Energy Efficiency Analysis and Energy Code Compliances, Climate Change…” Source: RevenueBase Database · checked Sep 28, 2026
2	Lead Consultancy And Engineering Services India PVT LTD	Indirect evidence	Bengaluru, IndiaHQ checked Sep 28, 2026	51-200	174 contacts →
	Indirect evidence “LEAD Consultancy & Engineering Services (India) Private Limited (LCES) has been started by a team of qualified professionals with vast experience and expertise in the areas of…” Source: RevenueBase Database · checked Sep 28, 2026
3	Greenfinch Real Estate Engineers & Consultants	Indirect evidence	Jaipur, IndiaHQ checked Sep 28, 2026	501-1,000	144 contacts →
	Indirect evidence “Greenfinch Real Estate Engineers and Consultants Pvt.” Source: RevenueBase Database · checked Sep 28, 2026
4	Greentree Global	Strong evidence	Noida, IndiaHQ checked Sep 28, 2026	51-200	143 contacts →
	Strong evidence “GreenTree Global is one of the leading Sustainability Consulting organisations providing Energy Efficiency & Climate Change Services like Integrated Sustainability Services…” Source: RevenueBase Database · checked Sep 28, 2026
5	Spectral Services Consultants Pvt. LTD	Indirect evidence	Noida, IndiaHQ checked Sep 28, 2026	201-500	113 contacts →
	Indirect evidence “Spectral is a 500-employee, Indian market leader in the provision of mechanical, electrical and specialist consultancy services for national and global clients who are looking to…” Source: RevenueBase Database · checked Sep 28, 2026
6	Idam Infrastructure Advisory Pvt. LTD	Indirect evidence	Mumbai, IndiaHQ checked Sep 28, 2026	51-200	84 contacts →
	Indirect evidence “Idam Infrastructure Advisory Pvt.” Source: RevenueBase Database · checked Sep 28, 2026
7	Kamal Cogent Energy Pvt. LTD	Partial evidence	Jaipur, IndiaHQ checked Sep 28, 2026	11-50	74 contacts →
	Partial evidence “Kamal Cogent Energy Pvt.” Source: RevenueBase Database · checked Sep 28, 2026
8	Consergy Systems And Technologies LLP	Partial evidence	Mumbai, IndiaHQ checked Sep 28, 2026	11-50	39 contacts →
	Partial evidence “Consergy Systems and Technologies LLP is an energy savings & environmental solutions provider for centrally air-conditioned Buildings with a view to reduce the carbon footprint on…” Source: RevenueBase Database · checked Sep 28, 2026
9	Aerosys Hvac Solutions	Partial evidence	Pune, IndiaHQ checked Sep 28, 2026	11-50	36 contacts →
	Partial evidence “Aerosys is a young, dynamic, enchanting Organization to Define, Design and Execute Energy Saving solutions to operational Chiller plants.” Source: RevenueBase Database · checked Sep 28, 2026
10	Sustenergy Foundation	Partial evidence	Kottayam, IndiaHQ checked Sep 28, 2026	n/a	32 contacts →
	Partial evidence “Sustenergy Foundation - promoters of Sustainable energy conservation through cost effective measures.” Source: RevenueBase Database · checked Sep 28, 2026
11	Yantra Harvest Energy Pvt. LTD	Partial evidence	Pune, IndiaHQ checked Sep 28, 2026	11-50	28 contacts →
	Partial evidence “Yantra Harvest is committed to provide unique and innovative energy saving solutions under ESCO to customers and they are cost effective.” Source: RevenueBase Database · checked Sep 28, 2026
12	Bigeta Energy Solutions	Partial evidence	Bengaluru, IndiaHQ checked Sep 28, 2026	11-50	27 contacts →
	Partial evidence “Bigeta Energy Solutions is an ISO 9001:2015 certified Energy & Sustainability Management company.” Source: RevenueBase Database · checked Sep 28, 2026
13	Energy Advisory Services Pvt. LTD	Partial evidence	Mumbai, IndiaHQ checked Sep 28, 2026	11-50	24 contacts →
	Partial evidence “Energy Advisory Services Pvt.” Source: RevenueBase Database · checked Sep 28, 2026
14	Earthonomic Engineers	Indirect evidence	Chennai, IndiaHQ checked Sep 28, 2026	1-10	23 contacts →
	Indirect evidence “At Earthonomics, we work towards developing sustainable environments for homes and organizations.” Source: RevenueBase Database · checked Sep 28, 2026
15	Btecon Bhagwat Technologies And Energy Conservation Private Limited	Partial evidence	New Delhi, IndiaHQ checked Sep 28, 2026	11-50	23 contacts →
	Partial evidence “Bhagwat Technologies and Energy Conservation Private Limited (BTECON) is incorporated in 2002 as a Private Limited Company with registered and principal office in Delhi.” Source: RevenueBase Database · checked Sep 28, 2026
16	MP Ensystems Advisory Private Limited	Partial evidence	Mumbai, IndiaHQ checked Sep 28, 2026	11-50	21 contacts →
	Partial evidence “MP Ensystems Advisory Private Limited is a niche energy and environmental sector consultancy and advisory firm.” Source: RevenueBase Database · checked Sep 28, 2026
17	V-Tech Renewables	Partial evidence	Pune, IndiaHQ checked Sep 28, 2026	11-50	21 contacts →
	Partial evidence “Solar Design Engineering & Owner’s Engineering \| Global Delivery Location: India \| Serving Africa & Middle East V-TECH Renewables is an Engineering-Led Renewable Energy…” Source: RevenueBase Database · checked Sep 28, 2026
18	Recare Electrical LLP	Partial evidence	Surat, IndiaHQ checked Sep 28, 2026	11-50	21 contacts →
	Partial evidence “RECARE is established by team of techno-commercials with most relevant and vast experience in energy sector consulting.” Source: RevenueBase Database · checked Sep 28, 2026
19	Climate Detox	Indirect evidence	Surat, IndiaHQ checked Sep 28, 2026	1-10	20 contacts →
	Indirect evidence “Aiming to make sustainable development a tangible business virtue.” Source: RevenueBase Database · checked Sep 28, 2026
20	Reinvent Design Technologies LLP	Indirect evidence	Pune, IndiaHQ checked Sep 28, 2026	11-50	18 contacts →
	Indirect evidence “RDT LLP is a forward-thinking consultancy firm specialising in Building Performance Analytics.” Source: RevenueBase Database · checked Sep 28, 2026
21	Enspar Sustainability PVT Ltd. Enspar Energy Solutions P LTD	Partial evidence	Bangalore, IndiaHQ checked Sep 28, 2026	11-50	16 contacts →
	Partial evidence “ENSPAR offers a unique range of Energy Saving Solutions that could save you up to 40% of your energy costs.” Source: RevenueBase Database · checked Sep 28, 2026
22	Izzi Business Services	Indirect evidence	Jamnagar, IndiaHQ checked Sep 28, 2026	11-50	16 contacts →
	Indirect evidence “IZZI Business Services (IZZIBS) is a proficient consulting and implementation service provider since 2016.” Source: RevenueBase Database · checked Sep 28, 2026
23	PEC Greening India	Indirect evidence	Andheri West, IndiaHQ checked Sep 28, 2026	11-50	16 contacts →
	Indirect evidence “Sustainability Consultants” Source: RevenueBase Database · checked Sep 28, 2026
24	Athul Energy Consultants Pvt. LTD	Partial evidence	Thrissur, IndiaHQ checked Sep 28, 2026	1-10	15 contacts →
	Partial evidence “Founded in 2008 as Athul Engineering Systems & Energy Consultants (AESEC) comprise of a group of professionals who have strong background in engineering sector.” Source: RevenueBase Database · checked Sep 28, 2026
25	Cgsgreen Sustainergy Pvt. LTD	Indirect evidence	Chennai, IndiaHQ checked Sep 28, 2026	11-50	15 contacts →
	Indirect evidence “CGS was established in the year 1992.” 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: energy efficiency 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 energy efficiency consultancies.
Partial evidence: Its own public description names part of energy efficiency consultancies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy efficiency 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 276 energy efficiency consultancies based in India

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Energy efficiency consultancies based in India at a glance

As of Sep 28, 2026

21.5%Verified-email coverage

10.1Average contacts per company

1-10Median size (employees)

6.9%Largest-city concentration · Pune

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

142

11-50

100

51-200

201-500

501-1,000

Email recency for this list is measured worldwide rather than for India, so it is reported there. Company counts and contact totals on this page are exact for India, over 276 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 energy efficiency 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 India whose own description of what they do matches “energy efficiency 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 energy efficiency 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 energy efficiency consultancies, and records with no verified work email. Companies headquartered outside India 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, 600 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 energy efficiency 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 energy efficiency consultancies are there based in India?

RevenueBase identified 276 energy efficiency consultancies headquartered in India 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?

D2o, headquartered in Jaipur, tops this list with the largest team on record.

Which city has the most energy efficiency consultancies?

Pune leads with 19 headquartered companies, followed by New Delhi (16) and Mumbai (15).

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 600 verified decision-maker contacts tracked across these 276 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.