Company lists · Data refreshed November 2026

Top 24 Ciso services based in Czechia

RevenueBase identified 224 company matches for ciso services associated with Czechia as of November 2026 and tracks 3,404 professional contacts across them, including 918 with verified work emails. Prague is the largest hub.

This list covers company matches for ciso services associated with Czechia, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
224Companies
3,404Contacts tracked
918Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 24 largest ciso services based in Czechia

Ranked by team size
Top 24 of 224 company matches for ciso services based in Czechia, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchPraha 4 - Michle, Czech RepublicHQ recorded Nov 6, 2026201-500139 contacts →

Exact match

“O2 IT Services je expertem v oblasti informačních technologií.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchPraha 4, Czech RepublicHQ recorded Nov 6, 202651-20075 contacts →

Exact match

“Corpus Solutions is a consulting and technology company specializing in applied cyber security.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchPraha 1, Czech RepublicHQ recorded Nov 6, 202651-20058 contacts →

Exact match

“Jsme lídrem a zkušeným poskytovatelem inovativních IT řešení napříč různými odvětvími.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchPraha 8, Czech RepublicHQ recorded Nov 6, 202651-20056 contacts →

Exact match

“We are a system integrator operating in the ICT security segment, specializing in authentication/authorization processes and access control to information, regardless of the place…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchPraha 4, Czech RepublicHQ recorded Nov 6, 202651-20054 contacts →

Exact match

“Ryze česká společnost Rexonix s.r.o.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchPrague, Czech RepublicHQ recorded Nov 6, 202651-20051 contacts →

Exact match

“SEFIRA is stable supplier of IT solutions and services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchPraha 4, Czech RepublicHQ recorded Nov 6, 202651-20047 contacts →

Exact match

“T-SOFT – Information systems and security on demand T-SOFT is an IT company that concentrates mainly on specialised information systems, integration and security, capable to…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchPrague, Czech RepublicHQ recorded Nov 6, 202651-20046 contacts →

Exact match

“Zajistíme pro vás komplexní IT služby v těchto oblastech Microsoft 365, Networking, Serverová řešení a Bezpečnost IT.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchPraha 7, Czech RepublicHQ recorded Nov 6, 202611-5039 contacts →

Exact match

“Chraňte své podnikání.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchPraha 5, Czech RepublicHQ recorded Nov 6, 202611-5033 contacts →

Exact match

“Since our incorporation in the Czech market in 1994 we have been committed to delivering information systems availability, disaster recivery and avoidance, secure data storage and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchOstrava, Czech RepublicHQ recorded Nov 6, 202611-5033 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchOstrava, Czech RepublicHQ recorded Nov 6, 202611-5031 contacts →

Exact match

“Bezpečnost je jen jedna.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchPraha 2, Czech RepublicHQ recorded Nov 6, 202651-20031 contacts →

Exact match

“Aira GROUP is specialized in followed service since 1998: outsourcing, network administration, computer safety and management of informations systems.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchPraha 5 - Stodůlky, Czech RepublicHQ recorded Nov 6, 202611-5030 contacts →

Exact match

“Jsme specialisté na zabezpečení dat.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchPraha 5, Czech RepublicHQ recorded Nov 6, 202611-5028 contacts →

Exact match

“Naše společnost je lídrem v síťové infrastruktuře a kybernetické bezpečnosti.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchBrno, Czech RepublicHQ recorded Nov 6, 202611-5028 contacts →

Exact match

“Společně se zákazníky měníme vize v oblasti ICT ve skutečnost.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchBrno, Czech RepublicHQ recorded Nov 6, 202651-20023 contacts →

Exact match

“Společnost GC System a.s.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchPrague, Czech RepublicHQ recorded Nov 6, 202611-5021 contacts →

Exact match

“Hledáte spolehlivého partnera v oblasti ICT, síťové infrastruktury pro datová centra a IT bezpečnosti?”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchPrague, Czech RepublicHQ recorded Nov 6, 202611-5016 contacts →

Exact match

“Chráníme malé a střední podniky před kybernetickými hrozbami a pomáháme jim splňovat legislativní požadavky NIS 2 (ZKB), DORA a GDPR, případně bezpečnostní normy a standardy…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchPrague 15, Czech RepublicHQ recorded Nov 6, 202611-5016 contacts →

Exact match

“Naše společnost poskytuje v oblasti informační a kybernetické bezpečnosti následující služby- Identifikace aktuálního stavu kybernetické bezpečnosti a vypracování plánu pro…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchPraha 9, Czech RepublicHQ recorded Nov 6, 202611-5015 contacts →

Exact match

“MyCom Solutions se výhradně zaměřuje na IT outsourcing a kybernetickou bezpečnost.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchPraha 1, Czech RepublicHQ recorded Nov 6, 202611-5015 contacts →

Exact match

“Pomůžeme Vám s praktickými dopady kybernetické informační bezpečnosti.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchBrno, Czech RepublicHQ recorded Nov 6, 202611-5014 contacts →

Exact match

“V roce 2003 jsme založili firmu Service & Support spol.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchFrýdek-místek, Czech RepublicHQ recorded Nov 6, 202611-5014 contacts →

Exact match

“Společnost TINT s.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 24 of 224 ciso services based in Czechia

See the full list, filter by size, metro and specialty, and access 918 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Ciso services based in Czechia at a glance

As of Nov 6, 2026
27.0%Verified-email coverage
15.2Average contacts per company
1-10Median size (employees)
40.2%Largest-city concentration · Prague
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
116
11-50
82
51-200
17
201-500
1
501-1,000
1
1,001-5,000
4

Email recency for this list is measured worldwide rather than for Czechia, so it is reported there. Company counts and contact totals on this page are exact for Czechia, over 224 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with Czechia whose business descriptions match “ciso services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 918 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Ciso services by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “ciso services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many ciso services are there based in Czechia?

RevenueBase identified 224 company matches for ciso services associated with Czechia as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

O2 IT Services S.R.O tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most ciso services?

Prague leads with 90 company records, followed by Brno (16) and Ostrava (9).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 918 professional contacts with verified work emails tracked across these 224 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 2026.

Ready to reach these companies? Verified emails and direct dials for all 224 ciso services based in Czechia. Start with a free account, no credit card.

Download this list →

Related lists

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 SmartSearch, 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.