Company lists · Data refreshed September 2026
Top 24 Cyber security companies based in Romania
RevenueBase identified 67 cyber security companies headquartered in Romania as of September 2026 and tracks 2,552 professional contacts across them, including 1,427 with verified work emails. Bucharest is the largest hub.
This list covers cyber security companies headquartered in Romania, 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 14, 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.
The 24 largest cyber security companies based in Romania
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 2,172 contacts → | ||||
Indirect evidence “Bitdefender is a cybersecurity leader delivering best-in-class threat prevention, detection, and response solutions worldwide.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 2 | 55 contacts → | ||||
Partial evidence “Safetech Innovations was founded in 2011, by a team of Information Security and Information Technology experts, who decided to share their experience, to provide customers with…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 3 | 45 contacts → | ||||
Indirect evidence “Data Core Systems is a cybersecurity provider helping organizations tackle one of the biggest challenges of the digital environment.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 4 | 35 contacts → | ||||
Strong evidence “Cyber Threat Defense™ Everything we do is for companies to never have to worry about cyber security again.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 5 | 25 contacts → | ||||
Indirect evidence “FORT is the cybersecurity defender you can trust to show up when you need it most.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 6 | 23 contacts → | ||||
Partial evidence “BIT SENTINEL is an information security company.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 7 | 15 contacts → | ||||
Indirect evidence “OMEGA Trust is a Romanian company established in 2004, which is specialized in providing audit and consulting services & products in the field of Cybersecurity.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 8 | 13 contacts → | ||||
Strong evidence “A successful cyber security approach has multiple layers of protection spread across the computers, networks, applications, or data that one intends to keep safe.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 9 | 11 contacts → | ||||
Partial evidence “Welcome to Cyber Smart Defence!” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 10 | 10 contacts → | ||||
Partial evidence “CYMED a fost înființată ca divizie de securitate cibernetică a InfoWorld ulterior devenind entitate juridică independentă care deține propriul Centru de Operații de Securitate…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 11 | 8 contacts → | ||||
Partial evidence “We’re more than just cybersecurity professionals – we’re your defense against cyber threats.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 12 | 8 contacts → | ||||
Indirect evidence “Enterprise cybersecurity services: NIS2 & ISO 27001 compliance, penetration testing, red teaming, phishing simulations, attack surface management, MDR, vulnerability assessments…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 13 | 6 contacts → | ||||
Indirect evidence “We are a company specialized in Cybersecurity for Embedded Systems across various industries, including Automotive, Industrial IoT, Consumer IoT, and Healthcare.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 14 | 6 contacts → | ||||
Indirect evidence “With a steadfast commitment to safeguarding your digital world, we're here to provide top-notch solutions, industry insights, and expert guidance.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 15 | 5 contacts → | ||||
Strong evidence “We are a boutique cyber security company that provides specialized solutions for your digital security needs.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 16 | 5 contacts → | ||||
Indirect evidence “We are on a mission to transform the way organizations reach and maintain digital operational resilience.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 17 | 4 contacts → | ||||
Strong evidence “Founded in 2001 in Bucharest, Romania, Best Internet Security | BISS is a Cyber Security dedicated company, focused on providing towards Romanian organizations of all types and…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 18 | 4 contacts → | ||||
Partial evidence “Blackshell stands out in cybersecurity innovation, providing companies and public institutions with advanced, yet accessible and user-friendly security solutions - including a…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 19 | 3 contacts → | ||||
Partial evidence “De peste 30 de ani, ESET a dezvoltat soluții și servicii software de securitate IT de top pentru a oferi o protecție multilayer, împotriva amenințărilor de securitate cibernetică…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 20 | 2 contacts → | ||||
Partial evidence “Netrunners offers a comprehensive range of cybersecurity services, including Penetration Testing, Red Team Engagements, Cybersecurity Training, and Security Audits.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 21 | 2 contacts → | ||||
Indirect evidence “Vulnerability Research Vulnerability Scanning / Vulnerability Assessment Penetration Testing (Black box, Gray box, White box): Network Penetration Testing (external/internal) Web…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 22 | 1 contacts → | ||||
Partial evidence “Sectio Aurea is an advanced cybersecurity consulting company established in 2018, specializing in security audits, strategic cybersecurity advisory, outsourced security services…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 23 | 1 contacts → | ||||
Partial evidence “Expanding cyber knowledge to all people and companies is our strategic mission.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 24 | 1 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: cyber security companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names cyber security companies.
- Partial evidence
- Its own public description names part of cyber security companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name cyber security companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 24 of 67 cyber security companies based in Romania
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Cyber security companies based in Romania at a glance
As of Sep 14, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for Romania, so it is reported there. Company counts and contact totals on this page are exact for Romania, over 67 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 cyber security 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 Romania whose own description of what they do matches “cyber security 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 cyber security 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 cyber security companies, and records with no verified work email. Companies headquartered outside Romania 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, 1,427 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 14, 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.
Cyber security companies by metro
- Cyber security companies in Bucharest30
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 cyber security 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 cyber security companies are there based in Romania?
RevenueBase identified 67 cyber security companies headquartered in Romania 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?
Bitdefender, headquartered in Bucuresti, tops this list with the largest team on record.
Which city has the most cyber security companies?
Bucharest leads with 30 headquartered companies, followed by Bucuresti (7) and Cluj-Napoca (6).
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 1,427 verified decision-maker contacts tracked across these 67 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 14, 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.
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