Company lists · Data refreshed September 2026
Top 25 Dark web monitoring services worldwide
RevenueBase identified 405 dark web monitoring services worldwide as of September 2026 and tracks 5,891 professional contacts across them, including 1,995 with verified work emails. The United States is the largest market and London the largest hub.
This list covers dark web monitoring 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 dark web monitoring 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 dark web monitoring services worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 904 contacts → | ||||
Indirect evidence “ZeroFox is the solution to discover, validate, and disrupt external cyber threats before they harm revenue or reputation.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 273 contacts → | ||||
Indirect evidence “Babel Street delivers mission-grade risk intelligence for organizations across government, defense, and the private sector to expose hidden identities, secure vendor networks, and…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 234 contacts → | ||||
Indirect evidence “Axur is the external cybersecurity company empowering security teams to detect, inspect, and respond to threats beyond the perimeter.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 177 contacts → | ||||
Indirect evidence “Whether you’re a business or an individual, digital threats to your precious data and assets can come in any form - external or internal.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 167 contacts → | ||||
Indirect evidence “DefendEdge is a leading US-based cybersecurity firm specializing in protecting clients' firewalls, endpoints, and applications against cyber threats and vulnerabilities.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 154 contacts → | ||||
Indirect evidence “CYBEROO is the European cybersecurity company that helps businesses manage cyber risk in a continuous, integrated and measurable way.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 136 contacts → | ||||
Indirect evidence “DomainTools is the global leader for internet intelligence and the first place security practitioners go when they need to know.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 121 contacts → | ||||
Indirect evidence “Vairav Technology is a dedicated Cyber Defender, delivering cutting-edge solutions that proactively monitor, detect, and neutralize cyber threats in real-time.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 115 contacts → | ||||
Indirect evidence “BrandShield provides an AI Powered Digital Risk Protection solution.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 112 contacts → | ||||
Indirect evidence “Sorint.SEC is The CyberSecurity Company of the Global ICT Service Provider Sorint.LAB.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 110 contacts → | ||||
Indirect evidence “360 Privacy is the leader in digital exposure reduction for enterprises, executives, and high-profile individuals.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 108 contacts → | ||||
Indirect evidence “TechOwl is a CERT-In empanelled and ISO 27001 certified cybersecurity company helping enterprises stay ahead of evolving cyber threats through intelligent detection, automated…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 97 contacts → | ||||
Indirect evidence “Constella Intelligence is a global leader in identity risk intelligence.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 82 contacts → | ||||
Indirect evidence “Apura Cyber Corp is a company with deep technical expertise and extensive experience in threat intelligence, digital forensics, incident response, and anti-fraud operations.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 81 contacts → | ||||
Indirect evidence “Technisanct is a Cyber Security company headquartered in India.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 80 contacts → | ||||
Indirect evidence “Bytescare is building the future of Brand Protection.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 79 contacts → | ||||
Indirect evidence “Searchlight Cyber was founded in 2017 with a mission to stop criminals from acting with impunity.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 77 contacts → | ||||
Indirect evidence “Founded in 2002, MaxMind is an industry leader in IP intelligence, proxy detection, and online fraud prevention tools.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 68 contacts → | ||||
Indirect evidence “Voyager Labs, a world leader in AI-based investigation solutions, empowers organizations worldwide to gain deep investigative insights about individuals, groups, and topics.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 67 contacts → | ||||
Indirect evidence “Protecting the world’s leading Enterprise and Government organisations iZOOlogic provides bespoke and curated Threat Intelligence and Incident Response Asset Discovery and…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 65 contacts → | ||||
Indirect evidence “Q6 Cyber is an innovative threat intelligence company.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 65 contacts → | ||||
Strong evidence “Webz.io, the leading provider of Big Web Data, transforms the vast pool of web data from across the open and dark web into structured, insight-ready web data, enabling businesses…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 59 contacts → | ||||
Indirect evidence “DarkTower disrupts crime through cyber intelligence.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 54 contacts → | ||||
Indirect evidence “SIPI's mission is to provide highly effective online brand protection solutions to companies and thus help them to address their IP enforcement needs across the internet.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 53 contacts → | ||||
Strong evidence “Cybersixgill continuously collects and exposes the earliest possible indications of risk, moments after they surface on the clear, deep and dark web.” 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: dark web monitoring 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 dark web monitoring services.
- Partial evidence
- Its own public description names part of dark web monitoring services, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name dark web monitoring 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 405 dark web monitoring services worldwide
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 1,995 reachable decision-makers.
Free signup · no credit card
Dark web monitoring 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 dark web monitoring 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 dark web monitoring services are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “dark web monitoring 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 dark web monitoring 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 dark web monitoring 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, 1,995 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.
Dark web monitoring services by location
3 lists · largest firstEvery Dark web monitoring 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 dark web monitoring 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 dark web monitoring services are there worldwide?
RevenueBase identified 405 dark web monitoring 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?
Zerofox, headquartered in Baltimore, tops this list with the largest team on record.
Which country has the most dark web monitoring services?
The United States leads with 104 companies, followed by India (36) and the United Kingdom (28). Every dark web monitoring services list by country and city is linked on this page.
Which city has the most dark web monitoring services?
London leads with 15 headquartered companies, followed by Istanbul (6) and Miami (6).
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 1,995 verified decision-maker contacts tracked across these 405 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.
Ready to reach these companies? Verified emails and direct dials for all 405 dark web monitoring services worldwide. Start with a free account, no credit card.
Download this list →Related lists
Browse the directory
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.