Company lists · Data refreshed November 2026

Top 9 International development companies based in Poland

This directory lists 27 international development companies based in Poland, with 329 business contacts and 80 email addresses. Warsaw is the single most-represented city among the companies on the list, and the directory was updated in November 2026.

International development companies design, manage, and evaluate programs that support economic, social, health, governance, and infrastructure development across countries and regions. This list covers companies that provide international development consulting, program management, technical assistance, research, monitoring and evaluation, or related services for governments, nonprofits, donors, and other organizations. Ranked by team size, largest first. Data current as of November 6, 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 Nov 6, 2026 86% judged on-target in blind review
27Companies
329Contacts tracked
80Verified emails
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The 9 largest international development companies based in Poland

Ranked by team size
Top 9 of 27 international development companies based in Poland, ranked by team size, largest first. Data refreshed Nov 6, 2026. RevenueBase Smart Search rates how each company's information relates to international development companies: 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
1Indirect evidenceKielce, PolandHQ checked Nov 6, 202611-5056 contacts →

Indirect evidence

“We are a dynamic consulting firm with a global reach, supported by a team of over professionals across five continents.”

Source: RevenueBase Database · checked Nov 6, 2026
2Indirect evidencePoznań, PolandHQ checked Nov 6, 202611-5052 contacts →

Indirect evidence

“JESTEŚMY EKSPERTAMI W ROZWOJU LUDZI I ORGANIZACJI.”

Source: RevenueBase Database · checked Nov 6, 2026
3Partial evidenceKraków, PolandHQ checked Nov 6, 202651-20045 contacts →

Partial evidence

“Tyréns - We create better communities Tyréns is one of the leading Swedish consulting companies in the urban development and infrastructure sector.”

Source: RevenueBase Database · checked Nov 6, 2026
4Indirect evidenceKatowice, PolandHQ checked Nov 6, 20261-1011 contacts →

Indirect evidence

“Collect Consulting is an independent private consulting company from Upper Silesia region in Poland.”

Source: RevenueBase Database · checked Nov 6, 2026
5Indirect evidenceWrocław, PolandHQ checked Nov 6, 20261-1010 contacts →

Indirect evidence

“Jesteśmy zespołem specjalistów, których misją jest wspieranie dynamicznego rozwoju przedsiębiorstw poprzez wspólne kreowanie rozwiązań, które będą generowały największą wartość…”

Source: RevenueBase Database · checked Nov 6, 2026
6Indirect evidenceWarsaw, PolandHQ checked Nov 6, 202611-507 contacts →

Indirect evidence

“Because quality matters to us!”

Source: RevenueBase Database · checked Nov 6, 2026
7Indirect evidenceWrocław, PolandHQ checked Nov 6, 202611-502 contacts →

Indirect evidence

“Jako twórcy potrzebujemy maksymalnego czasu i przestrzeni na przyjemność konceptualnego myślenia.”

Source: RevenueBase Database · checked Nov 6, 2026
8Indirect evidenceSopot, PolandHQ checked Nov 6, 20261-102 contacts →

Indirect evidence

“Wiemy jak ważny jest dobór właściwych procesów rozwojowych w firmach.”

Source: RevenueBase Database · checked Nov 6, 2026
9Indirect evidencePszczyna, PolandHQ checked Nov 6, 20261-101 contacts →

Indirect evidence

Source: RevenueBase Database · checked Nov 6, 2026

Showing 9 of 27 international development companies based in Poland

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International development companies based in Poland at a glance

As of Nov 6, 2026
24.3%Verified-email coverage
12.2Average contacts per company
1-10Median size (employees)
22.2%Largest-city concentration · Warsaw
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
17
11-50
7
51-200
3

Email recency for this list is measured worldwide rather than for Poland, so it is reported there. Company counts and contact totals on this page are exact for Poland, over 27 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 international development companies, 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 Poland whose own description of what they do matches “international development companies”. 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 international development companies), 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 international development companies, and records with no verified work email. Companies headquartered outside Poland 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, 80 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 November 6, 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 do international development companies do?

International development companies provide consulting, program management, technical assistance, research, and evaluation services for projects addressing economic, social, health, governance, and infrastructure needs across countries and regions.

How many international development companies are based in Poland?

This directory contains 27 international development companies based in Poland, along with 329 business contacts and 80 email addresses.

Where are international development companies located?

Warsaw is the single most-represented city among the companies on this list. The directory includes companies based in Poland.

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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.