Company lists · Data verified August 2026

Top 13 Cybersecurity companies based in Tallinn, Estonia

Name: Cybersecurity companies based in Tallinn, Estonia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 47 companies tracked

Our directory lists 47 cybersecurity companies based in Tallinn, Estonia, with 363 professional contacts and 137 email addresses. The list was last updated in August 2026, and Tallinn is the single most-represented city among the companies listed.

Cybersecurity companies provide products and services that protect systems, networks, applications, devices, and data from unauthorized access, disruption, or misuse. This list covers companies that provide cybersecurity products, services, consulting, assessments, monitoring, incident response, or related protection for digital systems and data. Ranked by team size, largest first. Data current as of August 28, 2026.

47Companies

363Contacts tracked

137Verified emails

7Mobile numbers

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The 13 largest cybersecurity companies based in Tallinn, Estonia

Ranked by team size

Top 13 of 47 cybersecurity companies based in Tallinn, 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	Cybexer Technologies	Tallinn	51-200	31	26
3	Datami Cybersecurity Services	Tallinn	11-50	24	3
4	Clarified Security OÜ	Tallinn	11-50	21	18
5	Quantfall	Tallinn	11-50	12	6
6	Sekurno Cybersecurity	Tallinn	1-10	11	4
7	Talgen Cybersecurity	Tallinn	11-50	9	4
8	Scanfactory	Tallinn	11-50	7	2
9	Octicode	Tallinn	1-10	7	2
10	Cybertex Security	Tallinn	1-10	3	2
11	Cyberross OU	Tallinn	11-50	3	1
12	Kimova AI	Tallinn	1-10	2	1
13	cyberwise.space	Tallinn	1-10	1	1

Showing 13 of 47 cybersecurity companies based in Tallinn, Estonia

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Cybersecurity companies based in Tallinn, Estonia at a glance

As of Aug 28, 2026

1-10Median size (employees)

TallinnLargest hub · 47 HQs

7Contacts with mobile numbers

1Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

Cybersecurity companies by metro in Estonia

Metro	Companies
Cybersecurity companies in Tallinn	47
Cybersecurity companies in Tallin	5
Cybersecurity companies in Peetri	1
Cybersecurity companies in Talinn	1
Cybersecurity companies in Kesklinna Linnaosa	1
Cybersecurity companies in Viimsi Vald	1
Cybersecurity companies in Pudisoo Kula Kuusalu Vald	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 companies”, with match quality audited by blind human judging, and headquartered in Tallinn, 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; 1 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 companies are in the directory?

The directory lists 47 cybersecurity companies based in Tallinn, Estonia.

Which city has the most cybersecurity companies?

Tallinn is the single most-represented city among the cybersecurity companies on the list.

How many contacts are available for cybersecurity companies?

The directory includes 363 professional contacts and 137 email addresses for the listed cybersecurity companies.

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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.