Company lists · Data refreshed September 2026

Top 14 Sustainability consultancy firms based in Kenya

RevenueBase identified 140 sustainability consultancy firms headquartered in Kenya as of September 2026 and tracks 567 professional contacts across them, including 48 with verified work emails. Nairobi is the largest hub.

This list covers sustainability consultancy firms headquartered in Kenya, 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 29, 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 29, 2026 86% judged on-target in blind review
140Companies
567Contacts tracked
48Verified emails
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The 14 largest sustainability consultancy firms based in Kenya

Ranked by team size
Top 14 of 140 sustainability consultancy firms based in Kenya, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to sustainability consultancy 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceNairobi, KenyaHQ checked Sep 29, 202611-5067 contacts →

Partial evidence

“QuestWorks is a firm of consultants in the real estate industry and Renewable Energy.”

Source: RevenueBase Database · checked Sep 29, 2026
2Indirect evidenceNairobi, KenyaHQ checked Sep 29, 202611-5023 contacts →

Indirect evidence

“KCIC Consulting is a multidisciplinary professional services firm that specializes in providing advisory support for sustainable development initiatives.”

Source: RevenueBase Database · checked Sep 29, 2026
3Partial evidenceNairobi, KenyaHQ checked Sep 29, 202611-5014 contacts →

Partial evidence

“Ecoscience & Engineering Ltd is a Company established to offer Environmental Sustainability, Climate Change, Safety Professional Services and Solutions.”

Source: RevenueBase Database · checked Sep 29, 2026
4Partial evidenceNairobi, KenyaHQ checked Sep 29, 202611-5011 contacts →

Partial evidence

“Rooted in sustainability, integrity, and excellence, we empower businesses with world-class, eco-conscious technology solutions.”

Source: RevenueBase Database · checked Sep 29, 2026
5Partial evidenceKenyaHQ checked Sep 29, 202611-5010 contacts →

Partial evidence

“Impact Africa Consulting Limited is a leading sustainability and strategy advisory firm that support businesses, investors, governments, and development partners.”

Source: RevenueBase Database · checked Sep 29, 2026
6Strong evidenceNairobi, KenyaHQ checked Sep 29, 20261-1010 contacts →

Strong evidence

“Energy efficiency | Renewable energy | Green Buildings | ESG | Sustainability | Circular Economy | Building Services Consultants”

Source: RevenueBase Database · checked Sep 29, 2026
7Indirect evidenceNairobi, KenyaHQ checked Sep 29, 202611-508 contacts →

Indirect evidence

“We help organizations implement realistic, relevant and flexible Organizational Structure and Operational Systems with focus on addressing internal priorities covering: Energy…”

Source: RevenueBase Database · checked Sep 29, 2026
8Indirect evidenceNairobi, KenyaHQ checked Sep 29, 202611-507 contacts →

Indirect evidence

“At Protos Capital, we empower businesses for sustainable growth.”

Source: RevenueBase Database · checked Sep 29, 2026
9Strong evidenceNairobi, KenyaHQ checked Sep 29, 20261-104 contacts →

Strong evidence

“Soleil Solutions Africa is a trusted consultancy specializing in sustainability, compliance, and quality management.”

Source: RevenueBase Database · checked Sep 29, 2026
10Partial evidenceNairobi, KenyaHQ checked Sep 29, 202611-503 contacts →

Partial evidence

“Built for Good Africa: Green Building Consultancy, Advocacy, Education and Awareness Buildings contribute 36% of global energy use and 39 % of energy related carbon dioxide…”

Source: RevenueBase Database · checked Sep 29, 2026
11Indirect evidenceNairobi, KenyaHQ checked Sep 29, 20261-103 contacts →

Indirect evidence

“Richan Eco Consult (REC) is a premier environment, health and safety consulting firm with offices in Nairobi Kenya.”

Source: RevenueBase Database · checked Sep 29, 2026
12Partial evidenceNairobi, KenyaHQ checked Sep 29, 202611-501 contacts →

Partial evidence

“Climate and Energy (C&E) Advisory, formerly Camco Advisory Services (K) Ltd, is a Kenyan registered international environmental consultancy firm founded in 1989.”

Source: RevenueBase Database · checked Sep 29, 2026
13Indirect evidenceNairobi, KenyaHQ checked Sep 29, 20261-101 contacts →

Indirect evidence

“At the heart of Prestonwook Capital Advisors lies our unwavering commitment to driving meaningful change through strategic insight and innovation.”

Source: RevenueBase Database · checked Sep 29, 2026
14Partial evidenceNairobi, KenyaHQ checked Sep 29, 20261-101 contacts →

Partial evidence

“Given the speed at which the environmental and social safeguard (E&S) industry is changing globally, ‘Kisasa Environmental, Social and Governance (ESG) Consultants’ (also referred…”

Source: RevenueBase Database · checked Sep 29, 2026

Showing 14 of 140 sustainability consultancy firms based in Kenya

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Sustainability consultancy firms based in Kenya at a glance

As of Sep 29, 2026
8.5%Verified-email coverage
4.0Average contacts per company
1-10Median size (employees)
87.9%Largest-city concentration · Nairobi
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
95
11-50
42
51-200
3

Email recency for this list is measured worldwide rather than for Kenya, so it is reported there. Company counts and contact totals on this page are exact for Kenya, over 140 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 sustainability consultancy 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 Kenya whose own description of what they do matches “sustainability consultancy 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 sustainability consultancy 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 sustainability consultancy firms, and records with no verified work email. Companies headquartered outside Kenya 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, 48 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 29, 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.

Sustainability consultancy firms by metro

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 sustainability consultancy 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 sustainability consultancy firms are there based in Kenya?

RevenueBase identified 140 sustainability consultancy firms headquartered in Kenya 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?

Questworks, headquartered in Nairobi, tops this list with the largest team on record.

Which city has the most sustainability consultancy firms?

Nairobi leads with 123 headquartered companies, followed by Mombasa (3) and Kiserian (1).

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 48 verified decision-maker contacts tracked across these 140 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 29, 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.