Company lists · Data verified August 2026

Top 25 Custom software developers based in Poland

Name: Custom software developers based in Poland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 1,023 companies tracked

There are 1,023 custom software developers headquartered in Poland (RevenueBase, August 2026). RevenueBase tracks 14,060 professional contacts across them, including 4,720 with verified work emails and 216 with mobile numbers. Warsaw is the largest hub.

This list covers custom software developers headquartered in 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.

1,023Companies

14,060Contacts tracked

4,720Verified emails

216Mobile numbers

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The 25 largest custom software developers based in Poland

Ranked by team size

Top 25 of 1,023 custom software developers based in 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	Asseco Business Solutions S.A	Lublin	501-1,000	671	492
2	Modsen	Warszawa	501-1,000	369	43
3	Instinctools	Warsaw	201-500	362	171
4	First Line Software	Warsaw	201-500	360	190
5	SCALO	n/a	501-1,000	346	242
6	Techmagic	Krakow	201-500	339	156
7	Avanquest	Krakow	201-500	313	129
8	The Software House	Warsaw	201-500	279	188
9	Nexio Management	Warsaw	501-1,000	241	92
10	Miquido	Krakow	201-500	185	103
11	SCAND	Warszawa	201-500	183	7
12	Syberry	Krakow	201-500	181	60
13	9bits	Warsaw	51-200	152	26
14	Opinov8	Wroclaw	201-500	152	4
15	Solwit SA Part Of Alten Group	Gdansk	201-500	147	89
16	Vilmate LLC	Warsaw	51-200	116	47
17	Inspeerity	Warsaw	51-200	104	73
18	Softwaremill	n/a	51-200	101	64
19	Reenbit	Warsaw	51-200	100	56
20	Softwarehut	Szczecin	51-200	99	56
21	Jetsoftpro	Wroclaw	201-500	96	37
22	Unity-T Group Sp. Z O.O. Sp.K	Krakow	51-200	94	31
23	Ein-Des-Ein	Warsaw	51-200	87	23
24	Sirocco	Warszawa	51-200	83	51
25	AKVEO	Warsaw	51-200	82	47

Showing 25 of 1,023 custom software developers based in Poland

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Custom software developers based in Poland at a glance

As of Aug 28, 2026

1-10Median size (employees)

WarsawLargest hub · 154 HQs

216Contacts with mobile numbers

8Emails re-verified in last 30 days

Companies by employee count

1-10

513

11-50

396

51-200

201-500

501-1,000

Custom software developers by metro

Metro	Companies
Custom software developers in Warsaw	154
Custom software developers in Warszawa	112
Custom software developers in Krakow	86
Custom software developers in Wroclaw	80
Custom software developers in Poznan	70
Custom software developers in Lodz	42
Custom software developers in Gdansk	35

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 “custom software developers”, with match quality audited by blind human judging, and headquartered in 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; 8 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 custom software developers are there based in Poland?

There are 1,023 custom software developers headquartered in Poland as of August 2026 (RevenueBase).

What is the largest company on this list?

Asseco Business Solutions S.A, headquartered in Lublin, tops this list with the largest team on record.

Which city has the most custom software developers?

Warsaw leads with 154 headquartered companies, followed by Warszawa (112) and Krakow (86).

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 4,720 verified decision-maker contacts tracked across these 1,023 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.