Company lists · Data refreshed September 2026

Top 25 City sustainability consultants based in South Africa

Name: City sustainability consultants based in South Africa
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 284 companies tracked

RevenueBase identified 284 city sustainability consultants headquartered in South Africa as of September 2026 and tracks 1,895 professional contacts across them, including 628 with verified work emails. Johannesburg is the largest hub.

This list covers city sustainability consultants 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 19, 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 19, 2026 86% judged on-target in blind review

284Companies

1,895Contacts tracked

628Verified emails

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The 25 largest city sustainability consultants based in South Africa

Ranked by team size

Top 25 of 284 city sustainability consultants based in South Africa, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to city sustainability consultants: 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	Pegasys Consulting	Indirect evidence	Cape Town, South AfricaHQ checked Sep 19, 2026	51-200	170 contacts →
	Indirect evidence “Pegasys is a multidisciplinary strategic management consulting group with expertise in the development and management of climate change, cities, energy, resilience, transport…” Source: RevenueBase Database · checked Sep 19, 2026
2	Digby Wells Environmental	Partial evidence	Bryanston, South AfricaHQ checked Sep 19, 2026	51-200	169 contacts →
	Partial evidence “Digby Wells Environmental delivers integrated environmental, social and sustainability solutions across the resource, infrastructure, energy and agriculture sectors.” Source: RevenueBase Database · checked Sep 19, 2026
3	Siyakha Consulting	Partial evidence	Johannesburg, South AfricaHQ checked Sep 19, 2026	51-200	90 contacts →
	Partial evidence “We are a niche firm that drives investment, commercial excellence, developmental strategies, and sustainability.” Source: RevenueBase Database · checked Sep 19, 2026
4	Osmond Lange Architects	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 19, 2026	51-200	84 contacts →
	Indirect evidence “Osmond Lange blends architecture, urban design and development management skills to deliver an integrated package of professional services to its clients.” Source: RevenueBase Database · checked Sep 19, 2026
5	Terramanzi Group	Indirect evidence	Cape Town, South AfricaHQ checked Sep 19, 2026	11-50	49 contacts →
	Indirect evidence “Terramanzi Group is a leading Cape Town based multi-disciplinary environmental firm.” Source: RevenueBase Database · checked Sep 19, 2026
6	GCX	Partial evidence	Cape Town, South AfricaHQ checked Sep 19, 2026	11-50	38 contacts →
	Partial evidence “The journey to sustainability is complex.” Source: RevenueBase Database · checked Sep 19, 2026
7	Synergy Global Consulting LTD	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 19, 2026	11-50	37 contacts →
	Indirect evidence “Synergy Global Consulting Ltd (Synergy) is an independent international consulting company that works with natural resource and infrastructure sectors operating in challenging…” Source: RevenueBase Database · checked Sep 19, 2026
8	Hlela Group Of Companies	Indirect evidence	Middelburg, South AfricaHQ checked Sep 19, 2026	51-200	37 contacts →
	Indirect evidence “Hlela Group is a diversified engineering, project and execution management service provider based in Mpumalanga, South Africa.” Source: RevenueBase Database · checked Sep 19, 2026
9	Solid Green	Partial evidence	Johannesburg, South AfricaHQ checked Sep 19, 2026	11-50	36 contacts →
	Partial evidence “Solid Green Consulting is a young and energetic company enthusiastic about advancing sustainability in the built environment.” Source: RevenueBase Database · checked Sep 19, 2026
10	Tshani Consulting C.C	Indirect evidence	East London, South AfricaHQ checked Sep 19, 2026	11-50	33 contacts →
	Indirect evidence “Tshani Consulting CC is a multi-disciplinary company providing professional advise and services in "Development Planning".” Source: RevenueBase Database · checked Sep 19, 2026
11	HN Consulting Engineers PTY LTD	Indirect evidence	Pietermaritzburg, South AfricaHQ checked Sep 19, 2026	11-50	29 contacts →
	Indirect evidence “HN Consulting Engineers (Pty) Ltd is a widely respected medium-sized consulting practice operating in the fields of civil and structural engineering, construction monitoring and…” Source: RevenueBase Database · checked Sep 19, 2026
12	Tv3 Architects I Town Planners I Urban Designers	Indirect evidence	Stellenbosch, South AfricaHQ checked Sep 19, 2026	11-50	27 contacts →
	Indirect evidence “Our mission is to sustain a successful, professional practice through the application of PROFESSIONAL EXPERTISE SERVICE EXCELLENCE PROFESSIONAL ETHICS SOUND BUSINESS PRACTICE For…” Source: RevenueBase Database · checked Sep 19, 2026
13	Ranyaka Community Transformation	Partial evidence	Stellenbosch, South AfricaHQ checked Sep 19, 2026	11-50	19 contacts →
	Partial evidence “Ranyaka was established as a non-profit, urban planning consultancy in 2013 in to develop transformative strategies for towns and neighborhoods across South Africa.” Source: RevenueBase Database · checked Sep 19, 2026
14	Brundtland Consulting	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 19, 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 19, 2026
15	Kongiwe	Partial evidence	Bryanston, South AfricaHQ checked Sep 19, 2026	11-50	19 contacts →
	Partial evidence “Founded in 2016, Kongiwe is a contemporary consultancy with the purpose ‘To solve environmental and social challenges by providing expert bespoke solutions that promote current…” Source: RevenueBase Database · checked Sep 19, 2026
16	Ecolution Consulting	Partial evidence	Cape Town, South AfricaHQ checked Sep 19, 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 19, 2026
17	Anthesis South Africa	Partial evidence	Cape Town, South AfricaHQ checked Sep 19, 2026	11-50	16 contacts →
	Partial evidence “Anthesis works with cities, companies, and other organisations to develop financially driven sustainability strategies, underpinned by technical expertise and delivered by…” Source: RevenueBase Database · checked Sep 19, 2026
18	Grenex	Indirect evidence	Pretoria, South AfricaHQ checked Sep 19, 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 19, 2026
19	Envitech	Indirect evidence	Parktown North, South AfricaHQ checked Sep 19, 2026	11-50	15 contacts →
	Indirect evidence “Envitech is a professional engineering group of companies focusing on sustainable technologies and projects in the environmental, waste management and mining sectors.” Source: RevenueBase Database · checked Sep 19, 2026
20	Triplo4 Sustainable Solutions PTY LTD	Indirect evidence	Ballito, South AfricaHQ checked Sep 19, 2026	11-50	14 contacts →
	Indirect evidence “Triplo 4 specialises in solving environmental challenges and improving environmental performance in a sustainable manner.” Source: RevenueBase Database · checked Sep 19, 2026
21	Nsovo Environmental Consulting	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 19, 2026	11-50	13 contacts →
	Indirect evidence “Our specialist area of focus is the assessment of multifaceted projects, including the establishment of linear developments, bulk infrastructure, power generation and…” Source: RevenueBase Database · checked Sep 19, 2026
22	Consulting For Sustainable Solutions	Indirect evidence	Cape Town, South AfricaHQ checked Sep 19, 2026	1-10	12 contacts →
	Indirect evidence “Consulting for Sustainable Solutions (CSS) is a boutique advisory firm which aims to unlock capital for Africa's sustainable future.” Source: RevenueBase Database · checked Sep 19, 2026
23	Ep3 Environmental	Partial evidence	Johannesburg, South AfricaHQ checked Sep 19, 2026	11-50	12 contacts →
	Partial evidence “EP3 Environmental (Pty) Ltd was established by Eben van Schalkwyk in 2013 and is a multi-disciplinary consulting firm that provides Environmental and Sustainability consulting…” Source: RevenueBase Database · checked Sep 19, 2026
24	Daffonchio Architects	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 19, 2026	11-50	10 contacts →
	Indirect evidence “We are at the forefront of sustainable architecture in Africa.” Source: RevenueBase Database · checked Sep 19, 2026
25	Impumelelo Consulting Engineers	Partial evidence	Pietermaritzburg, South AfricaHQ checked Sep 19, 2026	11-50	10 contacts →
	Partial evidence “Impumelelo Consulting Engineers (Pty) Ltd Impumelelo Consulting Engineers is a leading South African engineering consultancy specializing in infrastructure development and…” Source: RevenueBase Database · checked Sep 19, 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: city sustainability consultants. 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 city sustainability consultants.
Partial evidence: Its own public description names part of city sustainability consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name city sustainability consultants. 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 284 city sustainability consultants based in South Africa

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City sustainability consultants based in South Africa at a glance

As of Sep 19, 2026

33.1%Verified-email coverage

6.7Average contacts per company

1-10Median size (employees)

19.7%Largest-city concentration · Johannesburg

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

204

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 284 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 city sustainability consultants, 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 “city sustainability consultants”. 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 city sustainability consultants), 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 city sustainability consultants, 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, 628 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 19, 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.

City sustainability consultants by metro

City sustainability consultants in Johannesburg56
City sustainability consultants in Cape Town54

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 city sustainability consultants, 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 city sustainability consultants are there based in South Africa?

RevenueBase identified 284 city sustainability consultants 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?

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

Which city has the most city sustainability consultants?

Johannesburg leads with 56 headquartered companies, followed by Cape Town (54) and Pretoria (22).

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 628 verified decision-maker contacts tracked across these 284 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 19, 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.