Company lists · Data refreshed November 2026

Top 25 International development design firms worldwide

Name: International development design firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 42,948 companies tracked

RevenueBase identified 42,948 company matches for international development design firms worldwide as of November 2026 and tracks 1,063,624 professional contacts across them, including 362,433 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for international development design firms worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026. Country and city lists for international development design firms follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 SmartSearch · Exact Recorded Nov 6, 2026 How this list was built

42,948Companies

1,063,624Contacts tracked

362,433Verified emails

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The 25 largest international development design firms worldwide

Ranked by team size

Top 25 of 42,948 company matches for international development design firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	AECOM	Exact match	Dallas, TX, United StatesHQ recorded Nov 6, 2026	10001+	68,572 contacts →
	Exact match “AECOM is the global infrastructure leader, committed to delivering a better world.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Arcadis	Exact match	Amsterdam, CO, United KingdomHQ recorded Nov 6, 2026	10001+	36,645 contacts →
	Exact match “Arcadis is a leading global partner, delivering transformative projects with businesses, cities and industries.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Stantec	Exact match	Edmonton, AB, CanadaHQ recorded Nov 6, 2026	10001+	30,633 contacts →
	Exact match “Stantec empowers clients, people, and communities to rise to the world’s greatest challenges at a time when the world faces more unprecedented concerns than ever before.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	ARUP	Exact match	London, QC, United KingdomHQ recorded Nov 6, 2026	10001+	22,877 contacts →
	Exact match “We guide, plan and design the future of the built environment.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	SWECO	Exact match	Stockholm, SwedenHQ recorded Nov 6, 2026	10001+	19,587 contacts →
	Exact match “Sweco is at the heart of the green transition - planning and designing the sustainable communities and cities of the future.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Ramboll	Exact match	Copenhagen, DenmarkHQ recorded Nov 6, 2026	10001+	16,684 contacts →
	Exact match “Ramboll is a global architecture, engineering and consultancy company founded in Denmark in 1945.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	GHD	Exact match	Sydney, AustraliaHQ recorded Nov 6, 2026	10001+	15,329 contacts →
	Exact match “We are committed to addressing the world’s biggest challenges in the areas of water, energy and communities.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	DAR	Exact match	Beirut, LebanonHQ recorded Nov 6, 2026	10001+	11,589 contacts →
	Exact match “Dar is one of the world’s leading consultancies, providing design, planning, engineering, sustainability consulting, digital solutions and services, project management, and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Kimley-Horn	Exact match	Raleigh, NC, United StatesHQ recorded Nov 6, 2026	5,001-10,000	11,227 contacts →
	Exact match “Kimley-Horn is one of the nation’s premier planning and design consulting firms.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	WSP In Canada	Exact match	Montreal, ON, CanadaHQ recorded Nov 6, 2026	10001+	10,470 contacts →
	Exact match “We are one of the world’s leading professional services firms, uniting our engineering, advisory and science-based expertise to shape communities to advance humanity.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Gensler	Exact match	San Francisco, United StatesHQ recorded Nov 6, 2026	5,001-10,000	8,734 contacts →
	Exact match “Gensler is a global architecture, design, and planning firm with 57 locations across the Americas, Europe, Greater China, Asia Pacific, and the Middle East.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	COWI	Exact match	Lyngby, DenmarkHQ recorded Nov 6, 2026	5,001-10,000	7,737 contacts →
	Exact match “Together with customers, partners and colleagues, we shape a future where people and societies grow and flourish.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Khatib & Alami	Exact match	Downtown, PolandHQ recorded Nov 6, 2026	5,001-10,000	6,495 contacts →
	Exact match “Khatib & Alami (K&A) is a multidisciplinary design consultancy which operates primarily across the Middle East & Africa, Levant, Central and South-East Asia, and Europe.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	NEOM	Exact match	Neom, Saudi ArabiaHQ recorded Nov 6, 2026	1,001-5,000	6,449 contacts →
	Exact match “NEOM is a visionary, multi-generational development shaping a new model for sustainable living, economic opportunity, and human progress.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Grupo Tragsa	Exact match	Madrid, SpainHQ recorded Nov 6, 2026	10001+	5,282 contacts →
	Exact match “Tragsa Group is a group of public companies, integrated in the State Industrial Ownership Corporation (SEPI), which has become a full service supplier and a reference company to…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Chemonics International	Exact match	Washington, DC, United StatesHQ recorded Nov 6, 2026	1,001-5,000	4,648 contacts →
	Exact match “In a world where conditions are changing faster, resources are tighter, and the path to results is increasingly complex, delivery matters more than ever.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	BECA	Exact match	Auckland, New ZealandHQ recorded Nov 6, 2026	1,001-5,000	4,572 contacts →
	Exact match “Creative people together transforming the world is our vision.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	RPS	Exact match	Abingdon, United KingdomHQ recorded Nov 6, 2026	5,001-10,000	3,964 contacts →
	Exact match “Founded in 1970, RPS is part of Tetra Tech, a leading global provider of consulting and engineering services.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	STV	Exact match	New York, TX, United StatesHQ recorded Nov 6, 2026	1,001-5,000	3,812 contacts →
	Exact match “Follow STV for practical insight into the infrastructure, ideas and people making communities better.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Norconsult	Exact match	Sandvika, NorwayHQ recorded Nov 6, 2026	5,001-10,000	3,801 contacts →
	Exact match “Norconsult is a multidisciplinary engineering and design consultancy, providing services to clients in the public and private sectors worldwide.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Drees & Sommer	Exact match	Stuttgart, GermanyHQ recorded Nov 6, 2026	5,001-10,000	3,695 contacts →
	Exact match “Uniting opposites to create a world we want to live in Drees & Sommer is a partner-managed, global consulting company providing a single source of consultation and implementation…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Buro Happold	Exact match	Bath, PA, United KingdomHQ recorded Nov 6, 2026	1,001-5,000	3,626 contacts →
	Exact match “We are an international, integrated consultancy of engineers, designers and advisers.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	National Engineering Services Pakistan PVT Limited Nespak	Exact match	Lahore, PakistanHQ recorded Nov 6, 2026	5,001-10,000	3,557 contacts →
	Exact match “NESPAK is Pakistan’s premier consultancy organization (established in 1973).” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	SJ Group	Exact match	SingaporeHQ recorded Nov 6, 2026	10001+	3,513 contacts →
	Exact match “SJ designs spaces and systems that unlock human potential, delivering connection and certainty on shifting ground.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	ABT Global	Exact match	Rockville, MD, United StatesHQ recorded Nov 6, 2026	1,001-5,000	3,432 contacts →
	Exact match “Abt is a mission-driven consulting and research firm.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “international development design firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 42,948 international development design firms worldwide

See the full list, filter by size, metro and specialty, and access 362,433 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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International development design firms worldwide at a glance

As of Nov 6, 2026

34.1%Verified-email coverage

24.8Average contacts per company

1-10Median size (employees)

1.6%Largest-city concentration · London

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

24,993

11-50

12,794

51-200

3,247

201-500

875

501-1,000

301

1,001-5,000

220

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for international development design firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “international development design firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 362,433 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

International development design firms by location

248 lists · largest first

Every International development design firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “international development design firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many international development design firms are there worldwide?

RevenueBase identified 42,948 company matches for international development design firms worldwide as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

AECOM tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most international development design firms?

The United States leads with 6,745 companies, followed by India (3,424) and France (1,950). Every international development design firms list by country and city is linked on this page.

Which city has the most international development design firms?

London leads with 675 company records, followed by New York (440) and Paris (419).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 362,433 professional contacts with verified work emails tracked across these 42,948 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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 SmartSearch, 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.