Company lists · Data verified August 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 Verified Aug 28, 2026 111 companies tracked

There are 111 energy efficiency consulting firms headquartered in South Africa (RevenueBase, August 2026). RevenueBase 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. Data current as of August 28, 2026.

111Companies

937Contacts tracked

234Verified emails

72Mobile numbers

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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 verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	NUS Consulting Group	Sandton	201-500	334	25
2	Livewire Engineering And Consulting PTY LTD	Cape Town	11-50	48	27
3	Energy And Combustion Services	Kloof	11-50	41	34
4	Reonet	Sandton	51-200	36	21
5	Karebo Group	Woodmead	11-50	35	5
6	Onezero Consulting	Rosebank	11-50	26	16
7	LTM Energy PTY LTD	Johannesburg	201-500	26	15
8	Ecolution Consulting	Cape Town	11-50	17	13
9	The Energy Gurus	Centurion City Of Tshwane	51-200	16	8
10	Grenex	Nieuw Muckleneuk Pretoria	11-50	16	4
11	SEM Solutions PTY LTD	Cape Town	11-50	15	14
12	Energy Cost Savers	Johannesburg	11-50	11	2
13	Delta Carbon	Johannesburg	1-10	9	8
14	VMG Consultants	Johannesburg	11-50	8	5
15	Urban Earth	Cape Town	1-10	8	3
16	Engage Energy Engineering	Durban	1-10	6	3
17	Premier Brands Energy Solutions	Faerie Glen Pretoria	1-10	6	3
18	Terawatt Energy	Durban	11-50	5	1
19	Matleng Energy Solutions PTY LTD	Johannesburg	11-50	4	4
20	Clean Kilowatt Energy	Somerset West	11-50	4	4
21	Madonse Consulting Engineers	Bedfordview	1-10	4	3
22	Greenplan Consultants PTY LTD	Somerset West	1-10	3	2
23	Estac Engineering	Centurion	1-10	3	2
24	Ölinga	Sandton	11-50	3	1
25	WOW Greentech Energy	Johannesburg	1-10	3	1

Showing 25 of 111 energy efficiency consulting firms based in South Africa

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Energy efficiency consulting firms based in South Africa at a glance

As of Aug 28, 2026

1-10Median size (employees)

JohannesburgLargest hub · 22 HQs

72Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

Energy efficiency consulting firms by metro

Metro	Companies
Energy efficiency consulting firms in Johannesburg	22
Energy efficiency consulting firms in Cape Town	20
Energy efficiency consulting firms in Durban	7
Energy efficiency consulting firms in Pretoria	6
Energy efficiency consulting firms in Sandton	6
Energy efficiency consulting firms in Centurion	3
Energy efficiency consulting firms in Somerset West	3

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “energy efficiency consulting firms”, with match quality audited by blind human judging, and headquartered in South Africa.
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: Contact records re-verify on a rolling cadence; 0 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many energy efficiency consulting firms are there based in South Africa?

There are 111 energy efficiency consulting firms headquartered in South Africa as of August 2026 (RevenueBase).

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 is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.