Company lists · Data refreshed September 2026
Top 25 Security audit service providers worldwide
RevenueBase identified 5,996 security audit service providers worldwide as of September 2026 and tracks 68,972 professional contacts across them, including 15,232 with verified work emails. The United States is the largest market and London the largest hub.
This list covers security audit service providers worldwide, 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 29, 2026. Country and city lists for security audit service providers follow the table.
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 25 largest security audit service providers worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 12,771 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,232 contacts → | ||||
Partial evidence “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 1,007 contacts → | ||||
Indirect evidence “La proposition de valeur d'Onet dans la sécurité se fonde sur - son expertise sécurité et sa capacité à analyser les besoins et risques propres à ses clients- sa parfaite maîtrise…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 705 contacts → | ||||
Partial evidence “Get a free, powerful security assessment with personalised recommendations, the same analysis that costs from IT Consultancies.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 641 contacts → | ||||
Partial evidence “At Network Intelligence, we combine our team of 500+ security professionals with Transilience – our cutting-edge AI platform.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 628 contacts → | ||||
Indirect evidence “VikingCloud delivers battle-tested cybersecurity and compliance solutions that simply work.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 399 contacts → | ||||
Indirect evidence “A SAFEWAY empresa que integra a plataforma de cibersegurança do Grupo Stefanini se une a Protega.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 363 contacts → | ||||
Partial evidence “eSec Forte® Technologies is a CMMi Level 3 certified Global Consulting and IT Security Services company with offerings across Cloud Security, Cyber Forensics, Malware Detection…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 350 contacts → | ||||
Partial evidence “Cobalt is the pioneer in pentesting as a service and a leader in offensive security services.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 344 contacts → | ||||
Partial evidence “Bishop Fox is recognized as the leading authority in offensive security, providing solutions ranging from continuous penetration testing, red teaming, and attack surface…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 340 contacts → | ||||
Indirect evidence “TechDefence Labs (TechD Cybersecurity Limited) Award-winning | Innovative | Visionary We empower organizations across the globe to secure their applications, networks, and digital…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 335 contacts → | ||||
Indirect evidence “T A L A K U N C H I Networks Pvt.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 315 contacts → | ||||
Partial evidence “NVISO is a cyber security services firm composed of outstanding security professionals - each has a specific field of expertise, ranging from security research and risk management…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 272 contacts → | ||||
Strong evidence “Prescient Security is a global cybersecurity and compliance firm delivering risk-based audits, advanced penetration testing, and end-to-end framework support.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 255 contacts → | ||||
Indirect evidence “Baxter Clewis Cybersecurity, we bring to the table a unique set of experiences that allow us to best serve your cybersecurity needs.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 244 contacts → | ||||
Partial evidence “Securin is obsessed with helping leaders continuously improve their security posture.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 243 contacts → | ||||
Indirect evidence “Thoropass is the only end-to-end cybersecurity auditor.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 237 contacts → | ||||
Partial evidence “Synack is the leader in human-led and agentic AI-powered Penetration Testing as a Service (PTaaS), transforming offensive security to help organizations proactively reduce risk…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 230 contacts → | ||||
Partial evidence “We are a young company, founded in 2019 in Brazil, with the aim of bringing an innovative approach to the information security market, with state-of-the-art proprietary and…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 221 contacts → | ||||
Indirect evidence “CYRAAC Services Private Limited (CyRAACS) is a leading, technology-first cybersecurity consulting and advisory firm headquartered in India, empanelled with CERT-In and accredited…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 206 contacts → | ||||
Partial evidence “A veteran-owned cybersecurity company focused on penetration testing, security training, and compliance.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 205 contacts → | ||||
Partial evidence “Since we've been the 'Doctors of Network Security' for Indian enterprises, diagnosing vulnerabilities, prescribing the right solutions, and standing by our customers 24x7.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 204 contacts → | ||||
Indirect evidence “MindPoint Group, a Quantum Sky company, is a cybersecurity specialist trusted by U.S.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 197 contacts → | ||||
Partial evidence “Yogosha is an Offensive Security Testing Platform that allows companies and governments to raise their security posture.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 189 contacts → | ||||
Partial evidence “Protergo is an Indonesia-based cybersecurity company committed to delivering world-class security solutions.” Source: RevenueBase Database · checked Sep 29, 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: security audit service providers. 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 security audit service providers.
- Partial evidence
- Its own public description names part of security audit service providers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name security audit service providers. 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 25 of 5,996 security audit service providers worldwide
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Security audit service providers worldwide at a glance
As of Sep 29, 2026Companies by employee count
Email recency is reported on each country list linked below.
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 security audit service providers, 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.
- Coverage
- Every country. Country and city lists for security audit service providers are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “security audit service providers”. 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 security audit service providers), 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 security audit service providers, and records with no verified work email.
- 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, 15,232 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 29, 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.
Security audit service providers by location
42 lists · largest firstEvery Security audit service providers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Security audit service providers based in the United States1,273
- Security audit service providers based in India659
- Security audit service providers based in the United Kingdom378
- Security audit service providers based in France220
- Security audit service providers based in Canada199
- Security audit service providers based in Australia155
- Security audit service providers based in Germany151
- Security audit service providers based in the Netherlands135
- Security audit service providers based in Brazil132
- Security audit service providers based in Spain99
- Security audit service providers based in Poland76
- Security audit service providers based in the United Arab Emirates68
- Security audit service providers based in Italy59
- Security audit service providers based in South Africa58
- Security audit service providers based in Switzerland52
- Security audit service providers based in Türkiye52
- Security audit service providers based in Israel48
- Security audit service providers based in Belgium45
- Security audit service providers based in Indonesia40
- Security audit service providers based in Mexico40
- Security audit service providers based in Chile34
- Security audit service providers based in Romania33
- Security audit service providers based in Austria31
- Security audit service providers based in Sweden31
- Security audit service providers based in Colombia28
- Security audit service providers based in New Zealand27
- Security audit service providers based in Saudi Arabia27
- Security audit service providers based in Ukraine25
Cities
- Security audit service providers based in London, United Kingdom132
- Security audit service providers based in Bangalore, India76
- Security audit service providers based in Paris, France64
- Security audit service providers based in Toronto, Canada62
- Security audit service providers based in Hyderabad, India49
- Security audit service providers based in Pune, India49
- Security audit service providers based in Sao Paulo, Brazil49
- Security audit service providers based in Mumbai, India48
- Security audit service providers based in New York, United States43
- Security audit service providers based in Melbourne, Australia37
- Security audit service providers based in Sydney, Australia37
- Security audit service providers based in Chennai, India31
- Security audit service providers based in Ahmedabad, India30
- Security audit service providers based in San Francisco, United States29
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 security audit service providers, 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 security audit service providers are there worldwide?
RevenueBase identified 5,996 security audit service providers worldwide 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?
Private Sector, headquartered in Worldwide, tops this list with the largest team on record.
Which country has the most security audit service providers?
The United States leads with 1,273 companies, followed by India (659) and the United Kingdom (378). Every security audit service providers list by country and city is linked on this page.
Which city has the most security audit service providers?
London leads with 134 headquartered companies, followed by Paris (64) and Toronto (62).
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 15,232 verified decision-maker contacts tracked across these 5,996 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 29, 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.