Company lists · Data refreshed September 2026
Top 25 Open source intelligence providers worldwide
RevenueBase identified 464 open source intelligence providers worldwide as of September 2026 and tracks 2,741 professional contacts across them, including 873 with verified work emails. The United States is the largest market and London the largest hub.
This list covers open source intelligence 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 20, 2026. Country and city lists for open source intelligence 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 open source intelligence providers worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 164 contacts → | ||||
Indirect evidence “Maltego is the world’s most used all-in-one investigation platform that turns complex data into actionable insights in minutes.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 137 contacts → | ||||
Strong evidence “Fivecast delivers open-source intelligence solutions built for clarity, powered by AI, and trusted to surface what matters.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 125 contacts → | ||||
Partial evidence “DarkStar Intelligence is a Service-Disabled Veteran-Owned Small Business (SDVOSB) delivering advanced intelligence solutions to government and private sectors.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 90 contacts → | ||||
Indirect evidence “Our purpose is to make the world safer by empowering the human mind with the right information at the right time.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 89 contacts → | ||||
Strong evidence “At Liferaft, we specialize in Open Source Intelligence (OSINT) solutions that empower organizations to make informed decisions based on real-time data and insights.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 75 contacts → | ||||
Indirect evidence “ShadowDragon® provides OSINT tools that help organizations identify individuals, investigate digital activity, and monitor evolving threats across online environments.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 71 contacts → | ||||
Indirect evidence “QSL was established in 2023.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 66 contacts → | ||||
Strong evidence “NetWatch Global® specialise in online investigations and are experts in social media and open source investigation.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 60 contacts → | ||||
Indirect evidence “Synthesis is a Creative Data Consultancy based in Singapore, New York and London.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 58 contacts → | ||||
Strong evidence “Skopenow enables organizations to efficiently collect and analyze open-source intelligence to uncover threats and detect fraud.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 53 contacts → | ||||
Strong evidence “Semantic Visions uses automated open source intelligence technology powered by machine learning and linguistic expertise to analyze most online global news to discover precisely…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 52 contacts → | ||||
Strong evidence “We use open source information to break critical global stories.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 47 contacts → | ||||
Strong evidence “Storyzy's platform empowers investigators to detect information manipulation and retrieve intelligence from open sources.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 43 contacts → | ||||
Strong evidence “Social Links is a Global OSINT (Open source intelligence) vendor with HQ in the US that empowers investigators and security professionals with ground-breaking AI-powered products.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 43 contacts → | ||||
Strong evidence “To fight online child abuse, human trafficking and fraud, law enforcement agencies and the financial services industry need the best open source intelligence.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 40 contacts → | ||||
Strong evidence “OSINT FOR UKRAINE is an independent (non-profit) foundation dedicated to use Open Source Intelligence to: Investigate international crimes committed in relation to the…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 32 contacts → | ||||
Indirect evidence “OSINT Combine is a veteran-operated company specializing in mission-focused technology, practitioner-led training and expert enablement that helps organizations build enduring…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 31 contacts → | ||||
Indirect evidence “FORESIGHT is a technology-enabled information provider and virtual consultancy company.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 28 contacts → | ||||
Strong evidence “IMSL offers the ProQual Level 1 & Level 3 Award in Open Source Intelligence (OSINT) Training Course as well as in depth Intelligence Analysis Training.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 27 contacts → | ||||
Indirect evidence “Osavul is a technology company that offers OSINT-powered AI solutions for situational awareness to empower governments, security organizations, and enterprises to effectively…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 27 contacts → | ||||
Indirect evidence “OSINT Industries is an automated & scalable email, phone number & username checker tool for Law Enforcement, Private Investigators, Government and OSINT Practitioners.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 26 contacts → | ||||
Indirect evidence “Driving the age of AI.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 24 contacts → | ||||
Strong evidence “LeadSpotting is a next-generation Open-Source Intelligence (OSINT) company that transforms public and corporate data into actionable insights for AI-powered services.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 23 contacts → | ||||
Indirect evidence “Falkor is an AI-driven investigation hub that centralizes internal and external data-OSINT, SIGINT, dark web, geospatial, and more-into one secure, collaborative workspace.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 23 contacts → | ||||
Strong evidence “Sastre is a research consultancy, a global collective of multi-lingual corporate investigations professionals and public policy analysts who specialise in modern open source…” Source: RevenueBase Database · checked Sep 20, 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: open source intelligence 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 open source intelligence providers.
- Partial evidence
- Its own public description names part of open source intelligence providers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name open source intelligence 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 464 open source intelligence providers worldwide
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Open source intelligence providers worldwide at a glance
As of Sep 20, 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 open source intelligence 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 open source intelligence providers are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “open source intelligence 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 open source intelligence 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 open source intelligence 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, 873 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 20, 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.
Open source intelligence providers by location
2 lists · largest firstEvery Open source intelligence providers 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 open source intelligence 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 open source intelligence providers are there worldwide?
RevenueBase identified 464 open source intelligence 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?
Maltego, headquartered in Munich, tops this list with the largest team on record.
Which country has the most open source intelligence providers?
The United States leads with 81 companies, followed by the United Kingdom (47). Every open source intelligence providers list by country and city is linked on this page.
Which city has the most open source intelligence providers?
London leads with 27 headquartered companies, followed by Paris (15) and Tel Aviv (9).
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 873 verified decision-maker contacts tracked across these 464 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 20, 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.