Company lists · Data verified August 2026

Top 20 List building services based in Warszawa, Poland

Name: List building services based in Warszawa, Poland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 82 companies tracked

There are 82 list building services headquartered in Warszawa, Poland (RevenueBase, August 2026). RevenueBase tracks 460 professional contacts across them, including 154 with verified work emails and 2 with mobile numbers. Warszawa is the largest hub.

This list covers list building services headquartered in Warszawa, Poland, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

82Companies

460Contacts tracked

154Verified emails

2Mobile numbers

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The 20 largest list building services based in Warszawa, Poland

Ranked by team size

Top 20 of 82 list building services based in Warszawa, Poland, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Grupa Reesco	Warszawa	51-200	82	59
2	Z500	Warszawa	51-200	18	7
	RevenueBasePublisher of this directory	Boston, MA	n/a	n/a	Try free
3	AKINT	Warszawa	11-50	18	6
4	Portyk Architekci	Warszawa	11-50	17	12
5	Apritech Sp. Z O.O	Warszawa	11-50	15	8
6	Rohe Developer	Warszawa	11-50	12	7
7	Trescon	Warszawa	51-200	11	8
8	Instal ONE	Warszawa	11-50	11	8
9	Primater Sp. Z O.O	Warszawa	11-50	11	7
10	Pf-Projekt Sp. Z O.O	Warszawa	11-50	10	1
11	Goodroom Sp. Z O. O	Warszawa	11-50	6	5
12	Spaceplan Sp. Z O. O	Warszawa	11-50	5	2
13	Technico Facility Engineering Sp. Z O.O	Warszawa	11-50	4	3
14	Horizon Development Sp. Z O.O	Warszawa	1-10	4	3
15	Dwaa Architekci	Warszawa	1-10	4	1
16	Arte Engineering	Warszawa	11-50	3	3
17	Buildwise Sp. Z O. O	Warszawa	11-50	3	2
18	Juvenes-Projekt	Warszawa	11-50	2	2
19	Adam Ciuk Architekci	Warszawa	11-50	1	1
20	woz.design	Warszawa	1-10	1	1

Showing 20 of 82 list building services based in Warszawa, Poland

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List building services based in Warszawa, Poland at a glance

As of Aug 28, 2026

1-10Median size (employees)

WarszawaLargest hub · 82 HQs

2Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

1,001-5,000

List building services by metro in Poland

Metro	Companies
List building services in Warszawa	82
List building services in Krakow	57
List building services in Wroclaw	34
List building services in Poznan	29
List building services in Warsaw	26
List building services in Lodz	24
List building services in Gdansk	21

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “list building services”, with match quality audited by blind human judging, and headquartered in Warszawa, Poland.
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: Contact records re-verify on a rolling cadence; 0 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many list building services are there based in Warszawa, Poland?

There are 82 list building services headquartered in Warszawa, Poland as of August 2026 (RevenueBase).

What is the largest company on this list?

Grupa Reesco, headquartered in Warszawa, tops this list with the largest team on record.

Which city has the most list building services?

Warszawa leads with 82 headquartered companies, followed by Krakow (57) and Wroclaw (34).

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 154 verified decision-maker contacts tracked across these 82 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.