Company lists · Data refreshed September 2026

Top 25 Building decarbonization firms based in South Africa

Name: Building decarbonization firms based in South Africa
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 94 companies tracked

RevenueBase identified 94 building decarbonization firms headquartered in South Africa as of September 2026 and tracks 570 professional contacts across them, including 177 with verified work emails. Cape Town is the largest hub.

This list covers building decarbonization 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 16, 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 16, 2026 86% judged on-target in blind review

94Companies

570Contacts tracked

177Verified emails

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The 25 largest building decarbonization firms based in South Africa

Ranked by team size

Top 25 of 94 building decarbonization firms based in South Africa, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to building decarbonization 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	CITRA	Partial evidence	Cape Town, South AfricaHQ checked Sep 16, 2026	51-200	87 contacts →
	Partial evidence “The worldwide lack of appropriate housing and climate change is an opportunity to change the building industry through innovation.” Source: RevenueBase Database · checked Sep 16, 2026
2	Solid Green	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 16, 2026	11-50	36 contacts →
	Indirect evidence “Solid Green Consulting is a young and energetic company enthusiastic about advancing sustainability in the built environment.” Source: RevenueBase Database · checked Sep 16, 2026
3	Onezero Consulting	Partial evidence	Johannesburg, South AfricaHQ checked Sep 16, 2026	11-50	26 contacts →
	Partial 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 16, 2026
4	LTM Energy PTY LTD	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 16, 2026	201-500	26 contacts →
	Indirect 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 16, 2026
5	Brundtland Consulting	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 16, 2026	1-10	19 contacts →
	Indirect evidence “Brundtland Consulting is a South African management consulting firm specialized in climate change, green economy and renewable energy.” Source: RevenueBase Database · checked Sep 16, 2026
6	Ecolution Consulting	Partial evidence	Cape Town, South AfricaHQ checked Sep 16, 2026	11-50	17 contacts →
	Partial 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 16, 2026
7	The Energy Gurus	Indirect evidence	City Of Tshwane, South AfricaHQ checked Sep 16, 2026	51-200	16 contacts →
	Indirect evidence “The Energy Gurus (Pty) Ltd.” Source: RevenueBase Database · checked Sep 16, 2026
8	Grenex	Indirect evidence	Pretoria, South AfricaHQ checked Sep 16, 2026	11-50	16 contacts →
	Indirect evidence “Located in Pretoria, Grenex (PTY) Ltd specializes in energy management, water management, carbon management services and products.” Source: RevenueBase Database · checked Sep 16, 2026
9	SEM Solutions PTY LTD	Indirect evidence	Centurion, South AfricaHQ checked Sep 16, 2026	11-50	12 contacts →
	Indirect 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 16, 2026
10	Delta Carbon	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 16, 2026	1-10	9 contacts →
	Indirect evidence “Delta Carbon is an integrated energy services and decarbonisation advisory company.” Source: RevenueBase Database · checked Sep 16, 2026
11	Imbue Sustainability	Indirect evidence	Cape Town, South AfricaHQ checked Sep 16, 2026	1-10	9 contacts →
	Indirect evidence “Imbue Sustainability is a leading South African sustainability consultancy specialising in solar and renewable energy solutions and utility optimisation, enhancing the…” Source: RevenueBase Database · checked Sep 16, 2026
12	Pure Electrical Solutions Gauteng	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 16, 2026	11-50	9 contacts →
	Indirect evidence “Pure Electrical Solutions is a leading solar company dedicated to providing innovative and sustainable energy solutions for residential, industrial, and commercial sectors.” Source: RevenueBase Database · checked Sep 16, 2026
13	PJC Partners	Partial evidence	Cape Town, South AfricaHQ checked Sep 16, 2026	1-10	8 contacts →
	Partial evidence “PJC is an environmental + sustainable design consultancy in the building industry focusing on climate responsive architecture, bioclimatic design and operational building…” Source: RevenueBase Database · checked Sep 16, 2026
14	Urban Earth	Indirect evidence	Cape Town, South AfricaHQ checked Sep 16, 2026	1-10	8 contacts →
	Indirect evidence “Urban Earth is a South African sustainability consultancy established in 2010.” Source: RevenueBase Database · checked Sep 16, 2026
15	Engage Energy Engineering	Indirect evidence	Durban, South AfricaHQ checked Sep 16, 2026	1-10	6 contacts →
	Indirect 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 16, 2026
16	Terawatt Energy	Indirect evidence	Durban, South AfricaHQ checked Sep 16, 2026	11-50	5 contacts →
	Indirect evidence “Terawatt Energy is a Business Energy Solutions provider helping businesses navigate the its way through Sustainability Projects.” Source: RevenueBase Database · checked Sep 16, 2026
17	Clean Kilowatt Energy	Indirect evidence	Somerset West, South AfricaHQ checked Sep 16, 2026	11-50	4 contacts →
	Indirect 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 16, 2026
18	Q-Mech	Indirect evidence	Pretoria, South AfricaHQ checked Sep 16, 2026	11-50	4 contacts →
	Indirect evidence “At Q-Mech Consulting Engineers, our mission is to add optimum value in the design of mechanical services through our energy management competencies to satisfy the unique…” Source: RevenueBase Database · checked Sep 16, 2026
19	Ecosteps	Partial evidence	Maruleng, South AfricaHQ checked Sep 16, 2026	1-10	4 contacts →
	Partial evidence “Consultancy/Developer in the Renewable Energy and alternate building Industry.” Source: RevenueBase Database · checked Sep 16, 2026
20	VMG Consultants	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 16, 2026	11-50	4 contacts →
	Indirect evidence “VMG Consultants have been awarded Mechanical Engineering Consulting company of the year, two years running.” Source: RevenueBase Database · checked Sep 16, 2026
21	Mike Barker Associates	Partial evidence	Johannesburg, South AfricaHQ checked Sep 16, 2026	1-10	4 contacts →
	Partial evidence “Consulting Electronics Engineers for the Built Environment, specializing in Building Management and Control Systems- Focused on improving the profitability and sustainability of…” Source: RevenueBase Database · checked Sep 16, 2026
22	Greenplan Consultants PTY LTD	Partial evidence	Cape Town, South AfricaHQ checked Sep 16, 2026	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 16, 2026
23	Energy Cost Savings Specialists	Indirect evidence	Pretoria, South AfricaHQ checked Sep 16, 2026	1-10	3 contacts →
	Indirect evidence “Professional Power and Energy Specialist Solutions and Renewable Energy Company.” Source: RevenueBase Database · checked Sep 16, 2026
24	Ölinga	Indirect evidence	Pretoria, South AfricaHQ checked Sep 16, 2026	11-50	3 contacts →
	Indirect 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 16, 2026
25	Ana-Digi Systems	Indirect evidence	Cape Town, South AfricaHQ checked Sep 16, 2026	11-50	2 contacts →
	Indirect evidence “Ana-Digi Systems is the industrial energy saving company.” Source: RevenueBase Database · checked Sep 16, 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: building decarbonization 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 building decarbonization firms.
Partial evidence: Its own public description names part of building decarbonization firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name building decarbonization 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 94 building decarbonization firms based in South Africa

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Building decarbonization firms based in South Africa at a glance

As of Sep 16, 2026

31.1%Verified-email coverage

6.1Average contacts per company

1-10Median size (employees)

23.4%Largest-city concentration · Cape Town

Sep 16, 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 South Africa, so it is reported there. Company counts and contact totals on this page are exact for South Africa, over 94 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 building decarbonization 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 “building decarbonization 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 building decarbonization 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 building decarbonization 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, 177 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 16, 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 building decarbonization 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 building decarbonization firms are there based in South Africa?

RevenueBase identified 94 building decarbonization 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?

CITRA, headquartered in Cape Town, tops this list with the largest team on record.

Which city has the most building decarbonization firms?

Cape Town leads with 22 headquartered companies, followed by Johannesburg (19) and Durban (6).

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 177 verified decision-maker contacts tracked across these 94 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 16, 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.