Company lists · Data refreshed September 2026

Top 25 Energy efficiency consulting firms based in South Africa

Name: Energy efficiency consulting firms based in South Africa
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 2, 2026 111 companies tracked

RevenueBase identified 111 energy efficiency consulting firms headquartered in South Africa as of September 2026 and tracks 937 professional contacts across them, including 234 with verified work emails and 72 with mobile numbers. Johannesburg is the largest hub.

This list covers energy efficiency consulting firms headquartered in South Africa, 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 2, 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 RevenueBase Smart Search rating on every row Refreshed Sep 2, 2026 86% judged on-target in blind review

111Companies

937Contacts tracked

234Verified emails

72Mobile numbers

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest energy efficiency consulting firms based in South Africa

Ranked by team size

Top 25 of 111 energy efficiency consulting firms based in South Africa, ranked by team size, largest first. Data refreshed Sep 2, 2026. RevenueBase Smart Search rates how each company's information relates to energy efficiency 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	NUS Consulting Group	Indirect evidence	Sandton, South Africa	201-500	334 contacts →
	Indirect evidence “National Utility Service, Inc.” Source: RevenueBase Database · checked Sep 2, 2026
2	Livewire Engineering And Consulting PTY LTD	Strong evidence	Cape Town, South Africa	11-50	48 contacts →
	Strong evidence “Livewire Engineering and Consulting (Pty) Ltd was founded in March 2006 to specifically address consulting requirements in the fields of Energy Management, Tariff Analysis, Energy…” Source: RevenueBase Database · checked Sep 2, 2026
3	Energy And Combustion Services	Indirect evidence	Kloof, South Africa	11-50	41 contacts →
	Indirect evidence “At ECS we strive to empower our customers in the mining, industrial and commercial sectors with the ability to transform and continuously enhance and optimise their operational…” Source: RevenueBase Database · checked Sep 2, 2026
4	Reonet	Indirect evidence	Sandton, South Africa	51-200	36 contacts →
	Indirect evidence “Reonet offers bespoke technical solutions and decades of analytical experience to reduce your utility footprint and deliver quantifiable financial benefits.” Source: RevenueBase Database · checked Sep 2, 2026
5	Karebo Group	Strong evidence	Woodmead, South Africa	11-50	35 contacts →
	Strong evidence “Karebo has been in business since 1997 and has a solid track record in large scale energy efficiency rollouts and other mass rollouts.” Source: RevenueBase Database · checked Sep 2, 2026
6	Onezero Consulting	Indirect evidence	Rosebank, South Africa	11-50	26 contacts →
	Indirect evidence “Since our inception in 2010, we coined the term Greenovative and have aimed to be pioneers in the electrical and electronic building.” Source: RevenueBase Database · checked Sep 2, 2026
7	LTM Energy PTY LTD	Partial evidence	Johannesburg, South Africa	201-500	26 contacts →
	Partial evidence “LTM Energy is an Energy Services Company (ESCO) with a unique blend of skills and experience obtained primarily in the energy industry.” Source: RevenueBase Database · checked Sep 2, 2026
8	Ecolution Consulting	Strong evidence	Cape Town, South Africa	11-50	17 contacts →
	Strong evidence “Ecolution Consulting is a green building consultancy demonstrating that responsible design is the most practical and efficient way to build for the future.” Source: RevenueBase Database · checked Sep 2, 2026
9	The Energy Gurus	Partial evidence	Centurion City Of Tshwane, South Africa	51-200	16 contacts →
	Partial evidence “The Energy Gurus (Pty) Ltd.” Source: RevenueBase Database · checked Sep 2, 2026
10	Grenex	Partial evidence	Nieuw Muckleneuk Pretoria, South Africa	11-50	16 contacts →
	Partial evidence “Located in Pretoria, Grenex (PTY) Ltd specializes in energy management, water management, carbon management services and products.” Source: RevenueBase Database · checked Sep 2, 2026
11	SEM Solutions PTY LTD	Partial evidence	Cape Town, South Africa	11-50	15 contacts →
	Partial evidence “SEM Solutions is an ENERGY ENGINEERING company that specialises in tailoring bespoke solutions for the energy requirements of our clients.” Source: RevenueBase Database · checked Sep 2, 2026
12	Energy Cost Savers	Partial evidence	Johannesburg, South Africa	11-50	11 contacts →
	Partial evidence “Did you know that energy waste can drain your budget faster than you think?” Source: RevenueBase Database · checked Sep 2, 2026
13	Delta Carbon	Partial evidence	Johannesburg, South Africa	1-10	9 contacts →
	Partial evidence “Delta Carbon is an integrated energy services and decarbonisation advisory company.” Source: RevenueBase Database · checked Sep 2, 2026
14	VMG Consultants	Partial evidence	Johannesburg, South Africa	11-50	8 contacts →
	Partial evidence “VMG Consultants have been awarded Mechanical Engineering Consulting company of the year, two years running.” Source: RevenueBase Database · checked Sep 2, 2026
15	Urban Earth	Indirect evidence	Cape Town, South Africa	1-10	8 contacts →
	Indirect evidence “Urban Earth is a South African sustainability consultancy established in 2010.” Source: RevenueBase Database · checked Sep 2, 2026
16	Engage Energy Engineering	Partial evidence	Durban, South Africa	1-10	6 contacts →
	Partial evidence “Engage Energy and Engineering (Pty) Ltd “ENGAGE” has a core team that have worked on over 100 sites locally and internationally; providing energy advisory services, engineering…” Source: RevenueBase Database · checked Sep 2, 2026
17	Premier Brands Energy Solutions	Strong evidence	Faerie Glen Pretoria, South Africa	1-10	6 contacts →
	Strong evidence “Premier Brands Energy Solutions is an energy company focusing on renewable energy and energy efficiency.” Source: RevenueBase Database · checked Sep 2, 2026
18	Terawatt Energy	Partial evidence	Durban, South Africa	11-50	5 contacts →
	Partial evidence “Terawatt Energy is a Business Energy Solutions provider helping businesses navigate the its way through Sustainability Projects.” Source: RevenueBase Database · checked Sep 2, 2026
19	Matleng Energy Solutions PTY LTD	Strong evidence	Johannesburg, South Africa	11-50	4 contacts →
	Strong evidence “Matleng is a multi-disciplinary consulting engineering firm which strives to solve clients' energy related challenges through the effective implementation of new and/or existing…” Source: RevenueBase Database · checked Sep 2, 2026
20	Clean Kilowatt Energy	Strong evidence	Somerset West, South Africa	11-50	4 contacts →
	Strong evidence “We are dedicated to transforming the energy landscape by providing cutting-edge consulting services with a strong focus on renewable energy integration.” Source: RevenueBase Database · checked Sep 2, 2026
21	Madonse Consulting Engineers	Partial evidence	Bedfordview, South Africa	1-10	4 contacts →
	Partial evidence “Electrical Consulting Company Specialising in a wide range of services ranging from design, implementation and project administration from building services (Electrical and…” Source: RevenueBase Database · checked Sep 2, 2026
22	Greenplan Consultants PTY LTD	Partial evidence	Somerset West, South Africa	1-10	3 contacts →
	Partial evidence “Greenplan Consultants (Pty) Ltd was founded in 2007 after realising the huge impact buildings have on energy and building material resources.” Source: RevenueBase Database · checked Sep 2, 2026
23	Estac Engineering	Partial evidence	Centurion, South Africa	1-10	3 contacts →
	Partial evidence “We offer a comprehensive suite of services designed to optimise energy usage, ensure system reliability, and enhance overall electrical infrastructure.” Source: RevenueBase Database · checked Sep 2, 2026
24	Ölinga	Partial evidence	Sandton, South Africa	11-50	3 contacts →
	Partial evidence “We empower South African businesses to drastically reduce energy expenditure, maximize tax incentives (Section 12L), ensure regulatory compliance (EPC), and achieve a less…” Source: RevenueBase Database · checked Sep 2, 2026
25	WOW Greentech Energy	Partial evidence	Johannesburg, South Africa	1-10	3 contacts →
	Partial evidence “WOW Greentech stands as a premier sustainable energy solutions provider, we are dedicated to serving to Contractors, Commercial, and Industrial clients across Asia, Europe, the…” Source: RevenueBase Database · checked Sep 2, 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 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 energy efficiency consulting firms.
Partial evidence: Its own public description names part of energy efficiency consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy efficiency 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 111 energy efficiency consulting firms based in South Africa

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 234 reachable decision-makers.

Free signup · no credit card

View the full list →

Energy efficiency consulting firms based in South Africa at a glance

As of Sep 2, 2026

25.0%Verified-email coverage

7.7%Mobile-number coverage

8.4Average contacts per company

1-10Median size (employees)

19.8%Largest-city concentration · Johannesburg

Sep 2, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 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 South Africa whose own description of what they do matches “energy efficiency 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 energy efficiency 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 energy efficiency consulting firms, and records with no verified work email. Companies headquartered outside South Africa 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, 234 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 2, 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 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 energy efficiency consulting firms are there based in South Africa?

RevenueBase identified 111 energy efficiency consulting firms headquartered in South Africa 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?

NUS Consulting Group, headquartered in Sandton, tops this list with the largest team on record.

Which city has the most energy efficiency consulting firms?

Johannesburg leads with 22 headquartered companies, followed by Cape Town (20) and Durban (7).

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 234 verified decision-maker contacts tracked across these 111 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 2, 2026.

Ready to reach these companies? Verified emails and direct dials for all 111 energy efficiency consulting firms based in South Africa. Start with a free account, no credit card.

Download this list →

Related lists

Energy efficiency consulting firms by geography

Browse the directory

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.