Company lists · Data refreshed September 2026

Top 25 Security testing companies based in Poland

RevenueBase identified 72 security testing companies headquartered in Poland as of September 2026 and tracks 532 professional contacts across them, including 159 with verified work emails and 6 with mobile numbers. Warszawa is the largest hub.

This list covers security testing companies headquartered in Poland, 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 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 Sep 6, 2026 86% judged on-target in blind review
72Companies
532Contacts tracked
159Verified emails
6Mobile numbers
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The 25 largest security testing companies based in Poland

Ranked by team size
Top 25 of 72 security testing companies based in Poland, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to security testing 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
1Partial evidenceWarsaw, PolandHQ checked Sep 6, 2026201-50077 contacts →

“DeviQA has been supporting customer success stories for over 14 years, protecting and safeguarding our customers' brand and hard-fought reputation through best-in-class testing…”

Source: company website · checked Sep 6, 2026
2Strong evidenceKraków, PolandHQ checked Sep 6, 202651-20048 contacts →

Securitum is a leading European cybersecurity company specializing in penetration testing and IT security audits.”

Source: company website · checked Sep 6, 2026
3Strong evidenceKraków, PolandHQ checked Sep 6, 202611-5048 contacts →

“Niebezpiecznik provides highly practical & personalized IT Security Trainings * Hacking Web Applications,* Network/OS penetration testing,* Mobile Security,* Windows Security,*…”

Source: company website · checked Sep 6, 2026
4Partial evidenceWarszawa, PolandHQ checked Sep 6, 202651-20032 contacts →

“4Prime IT Security is a specialized team of cybersecurity experts with over 15 years of experience.”

Source: company website · checked Sep 6, 2026
5Indirect evidenceKraków, PolandHQ checked Sep 6, 202611-5025 contacts →

“We ensure your applications and systems are secure.”

Source: company website · checked Sep 6, 2026
6Indirect evidenceKraków, PolandHQ checked Sep 6, 202611-5020 contacts →

“SISOFT supports businesses and institutions in making better decisions around cybersecurity, compliance, and business continuity, in a world where technology evolves faster than…”

Source: company website · checked Sep 6, 2026
7Partial evidenceRzeszów, PolandHQ checked Sep 6, 202611-5020 contacts →

“Founded in 2020 by an ethical hacker and a former CTO, Iterasec has grown into one of the leading penetration testing companies in Ukraine and Poland.”

Source: company website · checked Sep 6, 2026
8Partial evidenceWarszawa, PolandHQ checked Sep 6, 202611-5018 contacts →

“AFINE is a trusted advisor in cybersecurity and penetration testing, serving leading organizations since 2015.”

Source: company website · checked Sep 6, 2026
9Partial evidenceWarszawa, PolandHQ checked Sep 6, 202611-5015 contacts →

“Inseqr offers modern, innovative solutions in the field of widely understood security.”

Source: company website · checked Sep 6, 2026
10Partial evidenceGdansk, PolandHQ checked Sep 6, 202611-5015 contacts →

“Elevate Quality with OKAY\QA: Your Global Software Testing Partner Welcome to OKAY\QA, a dynamic force in global software testing, operating through LLCs in Gdansk, Tashkent and…”

Source: company website · checked Sep 6, 2026
11Indirect evidenceGdynia, PolandHQ checked Sep 6, 202611-5014 contacts →

“Eurosoc – eksperci Red & Blue Team, którzy naprawdę czuwają nad Twoim bezpieczeństwem Zajmujemy się cyberbezpieczeństwem w praktyce.”

Source: company website · checked Sep 6, 2026
12Indirect evidenceKatowice, PolandHQ checked Sep 6, 20261-1013 contacts →

“Efigo specializes in comprehensive cybersecurity and data protection services.”

Source: company website · checked Sep 6, 2026
13Indirect evidenceWarszawa, PolandHQ checked Sep 6, 202611-5013 contacts →

“Jesteśmy grupą specjalistów działających na rynku bezpieczeństwa informacji od wielu lat.”

Source: company website · checked Sep 6, 2026
14Indirect evidenceRzeszów, PolandHQ checked Sep 6, 202611-5013 contacts →

“Sagenso is all you need to make your company's data and IT infrastructure cybersecure.”

Source: company website · checked Sep 6, 2026
15Indirect evidenceWarszawa, PolandHQ checked Sep 6, 20261-1011 contacts →
Source: company website · checked Sep 6, 2026
16Indirect evidenceGdańsk, PolandHQ checked Sep 6, 202611-5010 contacts →

“SprintTech to spółka dedykowana usługom cyberbezpieczeństwa, która jest częścią grupy kapitałowej Sprint S.A.”

Source: company website · checked Sep 6, 2026
17Partial evidenceWrocław, PolandHQ checked Sep 6, 202611-507 contacts →

“Our specialists find the weakest points in your company and will show you how to fix them step-by-step, as well as how to improve your security.”

Source: company website · checked Sep 6, 2026
18Partial evidencePoznań, PolandHQ checked Sep 6, 202611-506 contacts →

“PATRONUSEC | Your Cyber Security Patronus.”

Source: company website · checked Sep 6, 2026
19Indirect evidencePoznań, PolandHQ checked Sep 6, 20261-106 contacts →

“Specjaliści IT z doświadczeniem.”

Source: company website · checked Sep 6, 2026
20Indirect evidenceWarszawa, PolandHQ checked Sep 6, 202611-505 contacts →

“Immunity Systems to zespół specjalistów zajmujących się zagadnieniami związanymi z bezpieczeństwem IT.”

Source: company website · checked Sep 6, 2026
21Partial evidenceWarszawa, PolandHQ checked Sep 6, 20261-105 contacts →

“We are a highly specialized cyber security company run by senior level consultants.”

Source: company website · checked Sep 6, 2026
22Indirect evidenceŁódź, PolandHQ checked Sep 6, 20261-105 contacts →

“Firma IT Auditor zajmuje się kompleksowym badaniem stanu bezpieczeństwa informacji.”

Source: company website · checked Sep 6, 2026
23Partial evidenceWarsaw, PolandHQ checked Sep 6, 20261-104 contacts →

“Most companies get serious about security only when it’s already expensive: after a failed audit, after an incident, or under pressure from regulators.”

Source: company website · checked Sep 6, 2026
24Indirect evidenceWarsaw, PolandHQ checked Sep 6, 202611-504 contacts →

“Incise your defence level, become proactive, act effectively, be resilient and become an impregnable fortress!”

Source: company website · checked Sep 6, 2026
25Partial evidenceBielsko Biała, PolandHQ checked Sep 6, 20261-103 contacts →

“Defensive Security delivers high-quality cyber security services including Linux / Windows digital forensics, incident response, latest threat analysis, and hunting, penetration…”

Source: company website · checked Sep 6, 2026

Showing 25 of 72 security testing companies based in Poland

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Security testing companies based in Poland at a glance

As of Sep 6, 2026
29.9%Verified-email coverage
1.1%Mobile-number coverage
7.4Average contacts per company
1-10Median size (employees)
16.7%Largest-city concentration · Warszawa
Sep 6, 2026Page data refreshed

Companies by employee count

1-10
42
11-50
24
51-200
5
201-500
1

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

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 security testing 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 “security testing 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 security testing 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 security testing 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, 159 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 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 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 security testing companies, 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 security testing companies are there based in Poland?

RevenueBase identified 72 security testing companies headquartered in Poland 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?

Deviqa, headquartered in Warsaw, tops this list with the largest team on record.

Which city has the most security testing companies?

Warszawa leads with 12 headquartered companies, followed by Warsaw (10) and Wroclaw (9).

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 159 verified decision-maker contacts tracked across these 72 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 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 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.