Company lists · Data refreshed September 2026

Top 25 IT security consulting firms based in Switzerland

Name: IT security consulting firms based in Switzerland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 296 companies tracked

RevenueBase identified 296 IT security consulting firms headquartered in Switzerland as of September 2026 and tracks 2,952 professional contacts across them, including 1,292 with verified work emails and 62 with mobile numbers. Zurich is the largest hub.

This list covers IT security consulting firms headquartered in Switzerland, 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, how directly it supports the match, and when it was last checked. Data refreshed September 4, 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 HQ checked on every row Match evidence on every row Refreshed Sep 4, 2026 86% judged on-target in blind review

296Companies

2,952Contacts tracked

1,292Verified emails

62Mobile numbers

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The 25 largest IT security consulting firms based in Switzerland

Ranked by team size

Top 25 of 296 IT security consulting firms based in Switzerland, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names IT security consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Sits GroupStrong evidence	Wettingen, SwitzerlandHQ checked Sep 4, 2026	501-1,000	268
	“As a leading IT security enterprise, the SITS Group stands for end-to-end security.” Source: company website · checked Sep 4, 2026
2	Swiss Post CybersecurityPartial evidence	Aarau, SwitzerlandHQ checked Sep 4, 2026	51-200	101
	“Swiss Post Cybersecurity AG offers security solutions to protect digital assets and confidential data of organizations and helps to meet the increasing security requirements.” Source: company website · checked Sep 4, 2026
3	AvantecStrong evidence	Zurich, SwitzerlandHQ checked Sep 4, 2026	51-200	77
	“AVANTEC steht seit über 20 Jahren für höchste IT-Security-Kompetenz.” Source: company website · checked Sep 4, 2026
4	RedguardPartial evidence	Bern, SwitzerlandHQ checked Sep 4, 2026	51-200	73
	“Redguard is a company specialized in information security and cyber security with headquarters in Bern, Zurich and Neuchâtel.” Source: company website · checked Sep 4, 2026
5	KIDANPartial evidence	Allaman, SwitzerlandHQ checked Sep 4, 2026	51-200	71
	“At KIDAN, we are not just IT consultants; we are architects of the future.” Source: company website · checked Sep 4, 2026
6	Basevision AGIndirect evidence	Olten, SwitzerlandHQ checked Sep 4, 2026	51-200	67
	“We protect organizations from evolving cyber threats, empowering them to operate securely and confidently in an increasingly complex digital world.” Source: company website · checked Sep 4, 2026
7	OneconsultIndirect evidence	Zurich, SwitzerlandHQ checked Sep 4, 2026	51-200	63
	“Oneconsult has been your Swiss cybersecurity services partner since 2003 and operates independently of any particular products or manufacturers.” Source: company website · checked Sep 4, 2026
8	Compass SecurityStrong evidence	Rapperswil, SwitzerlandHQ checked Sep 4, 2026	51-200	59
	“Compass Security specializes in offensive and defensive IT security.” Source: company website · checked Sep 4, 2026
9	United Security ProvidersStrong evidence	Bern, SwitzerlandHQ checked Sep 4, 2026	51-200	56
	“IHR VERTRAUENSVOLLER CYBERSECURITY PARTNER Schutz und Sicherheit ohne Kompromisse Als Security Spezialist und führender Anbieter von IT-Sicherheitslösungen bieten wir mit höchstem…” Source: company website · checked Sep 4, 2026
10	E-Xpert Solutions SAPartial evidence	Geneva / Plan Les Ouates, SwitzerlandHQ checked Sep 4, 2026	51-200	52
	“As a company specialized in the Information Security field since 2001, our skills are strong technical expertise, engineering, health monitoring of devices and the development of…” Source: company website · checked Sep 4, 2026
11	SphynxPartial evidence	Zug, SwitzerlandHQ checked Sep 4, 2026	11-50	52
	“SPHYNX offers products and solutions, and consulting services, in the areas of cyber intelligence, analytics, incident response, assurance, and certification.” Source: company website · checked Sep 4, 2026
12	Swiss Infosec AGIndirect evidence	Sursee, SwitzerlandHQ checked Sep 4, 2026	51-200	37
	“Seit 1989 befassen wir uns professionell mit allem rund um die Sicherheit von Informationen.” Source: company website · checked Sep 4, 2026
13	CitadeloIndirect evidence	SwitzerlandHQ checked Sep 4, 2026	11-50	34
	“Citadelo was founded by ethical hackers to help companies identify vulnerabilities through simulated attacks.” Source: company website · checked Sep 4, 2026
14	E-SecureIndirect evidence	Le Grand-saconnex, SwitzerlandHQ checked Sep 4, 2026	11-50	32
	“Est une entreprise basée à Genève spécialisée dans le domaine de la sécurité informatique et des réseaux depuis l’an Elle compte un effectif de 28 personnes composé de deux…” Source: company website · checked Sep 4, 2026
15	ElcasecurityIndirect evidence	Lausanne, SwitzerlandHQ checked Sep 4, 2026	201-500	32
	“Your all-in-one partner to secure your business.” Source: company website · checked Sep 4, 2026
16	Cyberfy ConsultingPartial evidence	Dubendorf, SwitzerlandHQ checked Sep 4, 2026	11-50	27
	“Cyberfy Consulting is a technology consulting company based in Switzerland, founded by passionate experts with years of experience.” Source: company website · checked Sep 4, 2026
17	Selution AGIndirect evidence	Münchenstein, SwitzerlandHQ checked Sep 4, 2026	11-50	27
	“Wir von Selution haben es uns zur Aufgabe gemacht, Unternehmen in verschiedenen Branchen dabei zu helfen, mithilfe von modernsten Informations- und Kommunikationslösungen die…” Source: company website · checked Sep 4, 2026
18	Omicron AGStrong evidence	Wallisellen, SwitzerlandHQ checked Sep 4, 2026	11-50	27
	“OMICRON AG - IHR PARTNER FÜR IT SECURITY & NETZWERKLÖSUNGEN Seit 1995 sind wir auf IT Sicherheits- und Netzwerklösungen für Firmen spezialisiert und decken alle Bedürfnisse von…” Source: company website · checked Sep 4, 2026
19	Cybersec ServicesPartial evidence	Stabio, SwitzerlandHQ checked Sep 4, 2026	11-50	26
	“CyberSec Services nasce con la precisa volontà di diventare il partner di riferimento nell'ambito della Cyber Security per le Piccole e Medie Imprese, supportandole nella…” Source: company website · checked Sep 4, 2026
20	Ensec AGPartial evidence	Au Zh, SwitzerlandHQ checked Sep 4, 2026	11-50	23
	“ensec is a Swiss company specialized in information security.” Source: company website · checked Sep 4, 2026
21	Inseya AGPartial evidence	Bern, SwitzerlandHQ checked Sep 4, 2026	11-50	21
	“Wir erschliessen für Unternehmen das volle Potential von modernen, hybriden IT-Infrastrukturen, damit sich die Menschen sicher und einfach in digitalen Welten bewegen können.” Source: company website · checked Sep 4, 2026
22	Eb-Qual SAPartial evidence	Givisiez, SwitzerlandHQ checked Sep 4, 2026	11-50	20
	“eb-Qual is a specialist that provides ICT security and network services in Switzerland’s public and private sectors.” Source: company website · checked Sep 4, 2026
23	Machcon GmbhPartial evidence	Zug, SwitzerlandHQ checked Sep 4, 2026	11-50	19
	“machCon ist Ihre spezialisierte Unternehmensberatung für Datenschutz, IT-Sicherheit und Compliance.” Source: company website · checked Sep 4, 2026
24	Argonet SAStrong evidence	Bellinzona, SwitzerlandHQ checked Sep 4, 2026	11-50	16
	“Main competencies- IT Security - Remote access - Networking - VoIP - Datacenter infrastructure” Source: company website · checked Sep 4, 2026
25	Kastgroup GmbhPartial evidence	Wallisellen, SwitzerlandHQ checked Sep 4, 2026	11-50	14
	“Die KastGroup GmbH ist der richtige Partner für massgeschneiderte Schweizer Information Security Dienstleistungen.” Source: company website · checked Sep 4, 2026

Showing 25 of 296 IT security consulting firms based in Switzerland

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IT security consulting firms based in Switzerland at a glance

As of Sep 4, 2026

1-10Median size (employees)

ZurichLargest hub · 43 HQs

62Contacts with mobile numbers

Sep 4, 2026Data refreshed

Companies by employee count

1-10

212

11-50

51-200

201-500

501-1,000

Verified emails by last verification

0–30

31–60

107

61–90

683

90–180

496

180+

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 IT security consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Switzerland whose own description of what they do matches “IT security consulting firms”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among IT security consulting firms, and records with no verified work email. Companies headquartered outside Switzerland 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 an evidence 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, 1,292 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 4, 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.

IT security consulting firms by metro

IT security consulting firms in Zurich43

Frequently asked

How many IT security consulting firms are there based in Switzerland?

RevenueBase identified 296 IT security consulting firms headquartered in Switzerland 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?

Sits Group, headquartered in Basel, tops this list with the largest team on record.

Which city has the most IT security consulting firms?

Zurich leads with 43 headquartered companies, followed by Zug (13) and Bern (11).

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 1,292 verified decision-maker contacts tracked across these 296 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 4, 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 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.