Company lists · Data verified August 2026

Top 11 Cybersecurity defense contractors based in Estonia

Name: Cybersecurity defense contractors based in Estonia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 31 companies tracked

There are 31 cybersecurity defense contractors headquartered in Estonia (RevenueBase, August 2026). RevenueBase tracks 277 professional contacts across them, including 105 with verified work emails and 4 with mobile numbers. Tallinn is the largest hub.

This list covers cybersecurity defense contractors headquartered in Estonia, 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.

31Companies

277Contacts tracked

105Verified emails

4Mobile numbers

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The 11 largest cybersecurity defense contractors based in Estonia

Ranked by team size

Top 11 of 31 cybersecurity defense contractors based in Estonia, 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	Defsecintel Solutions	Tallinn	51-200	83	66
2	Datami Cybersecurity Services	Tallinn	11-50	24	3
3	Clarified Security OÜ	Tallinn	11-50	21	18
4	Sekurno Cybersecurity	Tallinn	1-10	11	4
5	Talgen Cybersecurity	Tallinn	11-50	9	4
6	Octicode	Tallinn	1-10	7	2
7	cybertech.global	Tartu	1-10	6	2
8	Cybertex Security	Tallinn	1-10	3	2
9	Cybers	City Centre	51-200	3	1
10	Cyberross OU	Tallinn	11-50	3	1
11	cyberwise.space	Tallinn	1-10	1	1

Showing 11 of 31 cybersecurity defense contractors based in Estonia

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Cybersecurity defense contractors based in Estonia at a glance

As of Aug 28, 2026

1-10Median size (employees)

TallinnLargest hub · 23 HQs

4Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

Cybersecurity defense contractors by metro

Metro	Companies
Cybersecurity defense contractors in Tallinn	23
Cybersecurity defense contractors in Peetri	1
Cybersecurity defense contractors in Kesklinna Linnaosa	1
Cybersecurity defense contractors in Pudisoo Kula Kuusalu Vald	1
Cybersecurity defense contractors in Tartu	1
Cybersecurity defense contractors in Tallin	1
Cybersecurity defense contractors in City Centre	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 “cybersecurity defense contractors”, with match quality audited by blind human judging, and headquartered in Estonia.
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 cybersecurity defense contractors are there based in Estonia?

There are 31 cybersecurity defense contractors headquartered in Estonia as of August 2026 (RevenueBase).

What is the largest company on this list?

Defsecintel Solutions, headquartered in Tallinn, tops this list with the largest team on record.

Which city has the most cybersecurity defense contractors?

Tallinn leads with 23 headquartered companies, followed by Peetri (1) and Kesklinna Linnaosa (1).

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 105 verified decision-maker contacts tracked across these 31 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.