Company lists · Data refreshed September 2026
Top 25 Data breach notification services worldwide
RevenueBase identified 238 data breach notification services worldwide as of September 2026 and tracks 1,765 professional contacts across them, including 678 with verified work emails. The United States is the largest market and London the largest hub.
This list covers data breach notification services 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 19, 2026. Country and city lists for data breach notification services 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 data breach notification services worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 213 contacts → | ||||
Indirect evidence “Founded by John F.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 137 contacts → | ||||
Indirect evidence “Solis is a leading provider of managed cyber security services and cyber incident response.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 47 contacts → | ||||
Indirect evidence “DCIT Conseil, société de services de consultation spécialisée dans la cybersécurité et les technologies de l'information.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 44 contacts → | ||||
Partial evidence “We're a full-service agency that helps organizations globally with their Cybersecurity, Data Protection, and Compliance requirements.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 42 contacts → | ||||
Indirect evidence “ITPSS Sdn Bhd offers various specialised information security and cyber security services including Incident Response and Handling, Managed Security Services (MSS), Penetration…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 40 contacts → | ||||
Indirect evidence “BDO Cyber Security GmbH is your competent partner in all in all cyber security matters.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 37 contacts → | ||||
Strong evidence “Identity Care Australia and New Zealand Limited (IDCARE) is not-for-profit charity and support service for data breaches and cyber incidents.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 35 contacts → | ||||
Indirect evidence “To provide the best information security services to its valued clients, Enterprise InfoSec Consultants (EIC) started its journey in 2016.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 31 contacts → | ||||
Partial evidence “Profero provides breach readiness and rapid response services through a predictable subscription model.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 31 contacts → | ||||
Indirect evidence “INFORC ECUADOR® es una compañía 100% ecuatoriana con vigencia desde el año 2005.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 25 contacts → | ||||
Indirect evidence “A DataGuide ajuda empresas a transformar Proteção de Dados, Segurança da Informação e Compliance em vantagem competitiva, não em custo regulatório.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 25 contacts → | ||||
Indirect evidence “Five Nines est née en 2019 d’un constat simple, celui d’un manque crucial de compétences et d’expérience dans la sécurisation de la transformation digitale des entreprises.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 22 contacts → | ||||
Indirect evidence “ComCERT SA, jedyna w Polsce, specjalizuje się w oferowaniu pomocy dla Administratorów IT/zespołów bezpieczeństwa w czasie i po ataku cyberprzestępczym (tzw.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 21 contacts → | ||||
Strong evidence “Digital Forensics, Incident Response & Data Breach Management Services 3B Data Security is an approved PCI SSC PCI Forensic Investigator (PFI) and Qualified Security Assessor…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 19 contacts → | ||||
Indirect evidence “Ihr zuverlässiger Partner für Consulting, Training und Services im Bereich Datenschutz und Informationssicherheit.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 19 contacts → | ||||
Indirect evidence “Somos una Consultoría especializada en Protección de Datos y Seguridad de la Información.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 18 contacts → | ||||
Partial evidence “PrivacyHawk is an all-in-one personal data protection service for consumers.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 17 contacts → | ||||
Strong evidence “NetDiligence® is a Cyber Risk Assessment and Data Breach Services company.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 17 contacts → | ||||
Partial evidence “FIRST PRIVACY is member of the DSN GROUP – a leading provider of services for the management and assessment of corporate data protection.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 13 contacts → | ||||
Indirect evidence “NXG Strategies, LLC, founded in 2005, is a pioneer in consumer identity investigation and remediation and an innovative designer and manufacturer of needs-based, identity fraud…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 12 contacts → | ||||
Partial evidence “We're here to keep your data secure.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 12 contacts → | ||||
Indirect evidence “Somos una empresa especializada en área de la protección de datos personales y seguridad de los sistemas de la información.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 11 contacts → | ||||
Partial evidence “Octillo is one of the few law firms in the country focused exclusively on data security and privacy, incident response, and litigation.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 11 contacts → | ||||
Partial evidence “From our diverse backgrounds in cyber incident response, forensic investigations, automation, data science and cyber insurance, we have a unique perspective on how to improve…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 11 contacts → | ||||
Indirect evidence “CyberCure is a boutique cyber security and privacy consultancy based in Wellington, NZ.” Source: RevenueBase Database · checked Sep 19, 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: data breach notification services. 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 data breach notification services.
- Partial evidence
- Its own public description names part of data breach notification services, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name data breach notification services. 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 238 data breach notification services worldwide
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Data breach notification services worldwide at a glance
As of Sep 19, 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 data breach notification services, 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 data breach notification services are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “data breach notification services”. 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 data breach notification services), 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 data breach notification services, 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, 678 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 19, 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.
Data breach notification services by location
2 lists · largest firstEvery Data breach notification services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
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 data breach notification services, 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 data breach notification services are there worldwide?
RevenueBase identified 238 data breach notification services 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?
Mullen Coughlin LLC, headquartered in Devon, tops this list with the largest team on record.
Which country has the most data breach notification services?
The United States leads with 60 companies, followed by Germany (25). Every data breach notification services list by country and city is linked on this page.
Which city has the most data breach notification services?
London leads with 9 headquartered companies, followed by Paris (5) and Sao Paulo (5).
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 678 verified decision-maker contacts tracked across these 238 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 19, 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.