Company lists · Data verified August 2026

Top 18 Defense cybersecurity companies based in Romania

Name: Defense cybersecurity companies based in Romania
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 46 companies tracked

There are 46 defense cybersecurity companies headquartered in Romania (RevenueBase, August 2026). RevenueBase tracks 325 professional contacts across them, including 149 with verified work emails and 5 with mobile numbers. Bucharest is the largest hub.

This list covers defense cybersecurity companies headquartered in Romania, 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.

46Companies

325Contacts tracked

149Verified emails

5Mobile numbers

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The 18 largest defense cybersecurity companies based in Romania

Ranked by team size

Top 18 of 46 defense cybersecurity companies based in Romania, 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	Revelsi	Bucharest	51-200	66	24
2	Safetech Innovations	Bucharest	51-200	53	42
3	Data Core Systems, Romania	n/a	11-50	43	27
4	BIT Sentinel	Bucharest	11-50	24	16
5	Fort Cyber	Bucharest	11-50	24	15
6	Global Data	Bucharest	1-10	13	1
7	D3 Cyber	Cluj-Napoca	1-10	8	5
8	Zamolxis	Bucharest	11-50	7	1
9	Axyome	Craiova	1-10	6	1
10	Dotdna	Bucharest	11-50	5	5
11	Blackshell	Bucharest	11-50	5	3
12	Espace IT	Cluj Napoca	1-10	4	2
13	Best Internet Security Biss	n/a	11-50	4	1
14	Eset Romania	Bucharest	11-50	3	2
15	Netrunners	Bucharest	11-50	2	1
16	Risktronics	n/a	1-10	2	1
17	Sectio Aurea	n/a	11-50	1	1
18	TLN Computer	Brasov	1-10	1	1

Showing 18 of 46 defense cybersecurity companies based in Romania

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Defense cybersecurity companies based in Romania at a glance

As of Aug 28, 2026

1-10Median size (employees)

BucharestLargest hub · 21 HQs

5Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

Defense cybersecurity companies by metro

Metro	Companies
Defense cybersecurity companies in Bucharest	21
Defense cybersecurity companies in Cluj-Napoca	3
Defense cybersecurity companies in Voluntari	2
Defense cybersecurity companies in Craiova	2
Defense cybersecurity companies in Bucuresti	2
Defense cybersecurity companies in Suceava	1
Defense cybersecurity companies in Bucharest Bucharest	1

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 “defense cybersecurity companies”, with match quality audited by blind human judging, and headquartered in Romania.
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 defense cybersecurity companies are there based in Romania?

There are 46 defense cybersecurity companies headquartered in Romania as of August 2026 (RevenueBase).

What is the largest company on this list?

Revelsi, headquartered in Bucharest, tops this list with the largest team on record.

Which city has the most defense cybersecurity companies?

Bucharest leads with 21 headquartered companies, followed by Cluj-Napoca (3) and Voluntari (2).

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 149 verified decision-maker contacts tracked across these 46 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.