Company lists · Data refreshed November 2026
Top 25 Open source intelligence firms based in the United Kingdom
RevenueBase identified 167 company matches for open source intelligence firms associated with the United Kingdom as of November 2026 and tracks 2,734 professional contacts across them, including 784 with verified work emails. London is the largest hub.
This list covers company matches for open source intelligence firms associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 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.
The 25 largest open source intelligence firms based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 847 contacts → | ||||
Exact match “BBC Monitoring provides trusted analysis of global media to help you make sense of complex narratives and world events.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 2 | 289 contacts → | ||||
Exact match “Sibylline is the world’s leading private consultancy for geopolitical risk, intelligence, and strategic insight, dedicated to helping leaders and organisations anticipate change…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 3 | 126 contacts → | ||||
Exact match “FACT are at the forefront of investigative and intelligence services, recognised by organisations, law enforcement, and governments worldwide.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 4 | 76 contacts → | ||||
Exact match “Logically helps organizations make sense of complex information environments.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 5 | 74 contacts → | ||||
Exact match “NetWatch Global® specialise in online investigations and are experts in social media and open source investigation.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 6 | 51 contacts → | ||||
Exact match “Blackdot is the UK technology company behind Videris, the most powerful investigations software for fighting serious, organised and economic crimes.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 7 | 50 contacts → | ||||
Exact match “Dragonfly is a geopolitical and security intelligence service for the world’s leading organisations.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 8 | 44 contacts → | ||||
Exact match “Investigation Limited is a well-established company offering Corporate Intelligence Services globally.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 9 | 43 contacts → | ||||
Exact match “Global Database provides first-party company intelligence sourced directly from official government registries, covering 600 million companies globally.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 10 | 40 contacts → | ||||
Exact match “Alaco is a leading business intelligence firm.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 11 | 39 contacts → | ||||
Exact match “ICP is an independent, human-led research firm providing decision-grade intelligence on companies operating in markets where reliable data cannot be trusted.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 12 | 38 contacts → | ||||
Exact match “CYJAX is an award-winning technology company and provider of digital threat intelligence services to international corporations, law enforcement agencies and the public sector.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 13 | 31 contacts → | ||||
Exact match “OSINT Industries is an automated & scalable email, phone number & username checker tool for Law Enforcement, Private Investigators, Government and OSINT Practitioners.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 14 | 31 contacts → | ||||
Exact match “IMSL offers the ProQual Level 1 & Level 3 Award in Open Source Intelligence (OSINT) Training Course as well as in depth Intelligence Analysis Training.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 15 | 25 contacts → | ||||
Exact match “We give our clients the confidence to identify opportunities, mitigate risks, tackle challenges and understand the landscapes they inhabit.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 16 | 24 contacts → | ||||
Exact match “Briter is a research and intelligence firm focused on emerging markets.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 17 | 24 contacts → | ||||
Exact match “Our Chartered Security Professionals seamlessly integrate discreet and effective security into lifestyles and organisations.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 18 | 21 contacts → | ||||
Exact match “Sastre is a research consultancy, a global collective of multi-lingual corporate investigations professionals and public policy analysts who specialise in modern open source…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 19 | 20 contacts → | ||||
Exact match “Grey Dynamics is a private intelligence firm that offers apolitical analysis on topics such as security, geopolitics, defence and espionage.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 20 | 17 contacts → | ||||
Exact match “Investment Reports is dedicated to bringing you comprehensive market intelligence in key business sectors across the world - now in partnership with Newsweek.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 21 | 17 contacts → | ||||
Exact match “The UK’s leading Surveillance, Intelligence and Open Source Investigations company.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 22 | 16 contacts → | ||||
Exact match “Hartford is a specialist strategic and market intelligence firm.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 23 | 16 contacts → | ||||
Exact match “Diligence is a private investigations firm, the output of our investigations help our clients make informed decisions bridging the gap between what they know and what they need to…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 24 | 15 contacts → | ||||
Exact match “In an increasingly fast-moving, complex, and uncertain world, it’s never been harder for organizations to predict and navigate the future.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 25 | 13 contacts → | ||||
Exact match “Bring together the UK OSINT community by gathering experts, practitioners, and learners in an informal environment to grow their OSINT capabilities, knowledge & network.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “open source intelligence firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 167 open source intelligence firms based in the United Kingdom
See the full list, filter by size, metro and specialty, and access 784 tracked professional contacts with verified work emails. Direct dials are available where recorded.
Free signup · no credit card
Open source intelligence firms based in the United Kingdom at a glance
As of Nov 6, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 167 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- 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
- Company records associated with the United Kingdom whose business descriptions match “open source intelligence firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- 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 displayed company carries at least one verified work email. RevenueBase tracks 784 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Open source intelligence firms by metro
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “open source intelligence firms”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many open source intelligence firms are there based in the United Kingdom?
RevenueBase identified 167 company matches for open source intelligence firms associated with the United Kingdom as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
BBC Monitoring tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most open source intelligence firms?
London leads with 114 company records, followed by Cambridge (2) and Corsham (2).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 784 professional contacts with verified work emails tracked across these 167 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 2026.
Ready to reach these companies? Verified emails and direct dials for all 167 open source intelligence firms based in the United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
Open source intelligence firms by geography
- Open source intelligence firms based in Paris, France
- Open source intelligence firms based in London, United Kingdom
- Open source intelligence firms based in New York, United States
- Open source intelligence firms based in Washington, United States
- Open source intelligence firms based in Brazil
- Open source intelligence firms based in Canada
- Open source intelligence firms based in France
- Open source intelligence firms based in India
- Open source intelligence firms based in Israel
- Open source intelligence firms based in Italy
- Open source intelligence firms based in the United States
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Open source intelligence firms based in Paris, France
- Open source intelligence firms based in London, United Kingdom
- Open source intelligence firms based in New York, United States
- Open source intelligence firms based in Washington, United States
- Open source intelligence firms based in Brazil
- Open source intelligence firms based in Canada
Company intelligence · public preview
Top 25 open source intelligence firms based in the United Kingdom
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 167 matching company records for open source intelligence firms based in the United Kingdom, with 2,734 tracked contacts and 784 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 6, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 open source intelligence firms based in the United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  BBC Monitoringmonitoring.bbc.co.ukHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 847 contacts → |
“BBC Monitoring provides trusted analysis of global media to help you make sense of complex narratives and world events.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Sibyllinesibylline.comHQ: Global, United KingdomReported employees: 201-500 | Global, United Kingdom | 201-500 | Exact match | 289 contacts → |
“Sibylline is the world’s leading private consultancy for geopolitical risk, intelligence, and strategic insight, dedicated to helping leaders and organisations anticipate change…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  FACTfact-uk.org.ukHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 126 contacts → |
“FACT are at the forefront of investigative and intelligence services, recognised by organisations, law enforcement, and governments worldwide.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Logicallylogically.aiHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 76 contacts → |
“Logically helps organizations make sense of complex information environments.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Netwatch Globalnetwatchglobal.comHQ: Birmingham, United KingdomReported employees: 51-200 | Birmingham, United Kingdom | 51-200 | Exact match | 74 contacts → |
“NetWatch Global® specialise in online investigations and are experts in social media and open source investigation.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Blackdot Solutionsblackdotsolutions.comHQ: Cambridge, United KingdomReported employees: 11-50 | Cambridge, United Kingdom | 11-50 | Exact match | 51 contacts → |
“Blackdot is the UK technology company behind Videris, the most powerful investigations software for fighting serious, organised and economic crimes.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Dragonfly From DOW Jonesdowjones.comHQ: London, United KingdomReported employees: Not recorded | London, United Kingdom | Not recorded | Exact match | 50 contacts → |
“Dragonfly is a geopolitical and security intelligence service for the world’s leading organisations.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Investigation Limitedinvestigation.euHQ: Newark, United KingdomReported employees: 11-50 | Newark, United Kingdom | 11-50 | Exact match | 44 contacts → |
“Investigation Limited is a well-established company offering Corporate Intelligence Services globally.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Global Databaseglobaldatabase.comHQ: Northampton, United KingdomReported employees: 11-50 | Northampton, United Kingdom | 11-50 | Exact match | 43 contacts → |
“Global Database provides first-party company intelligence sourced directly from official government registries, covering 600 million companies globally.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Sigma7 Alacoalaco.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 40 contacts → |
“Alaco is a leading business intelligence firm.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  ICPicpcredit.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 39 contacts → |
“ICP is an independent, human-led research firm providing decision-grade intelligence on companies operating in markets where reliable data cannot be trusted.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  CYJAXcyjax.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 38 contacts → |
“CYJAX is an award-winning technology company and provider of digital threat intelligence services to international corporations, law enforcement agencies and the public sector.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Osint Industriesosint.industriesHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 31 contacts → |
“OSINT Industries is an automated & scalable email, phone number & username checker tool for Law Enforcement, Private Investigators, Government and OSINT Practitioners.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  IMSLintelmsl.comHQ: Corsham, United KingdomReported employees: 11-50 | Corsham, United Kingdom | 11-50 | Exact match | 31 contacts → |
“IMSL offers the ProQual Level 1 & Level 3 Award in Open Source Intelligence (OSINT) Training Course as well as in depth Intelligence Analysis Training.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Ridgeway Informationridgeway-information.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 25 contacts → |
“We give our clients the confidence to identify opportunities, mitigate risks, tackle challenges and understand the landscapes they inhabit.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Briterbriter.coHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 24 contacts → |
“Briter is a research and intelligence firm focused on emerging markets.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Kiris Groupkirisgroup.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 24 contacts → |
“Our Chartered Security Professionals seamlessly integrate discreet and effective security into lifestyles and organisations.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Sastre Consultingsastreconsulting.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 21 contacts → |
“Sastre is a research consultancy, a global collective of multi-lingual corporate investigations professionals and public policy analysts who specialise in modern open source…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Grey Dynamicsgreydynamics.comHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 20 contacts → |
“Grey Dynamics is a private intelligence firm that offers apolitical analysis on topics such as security, geopolitics, defence and espionage.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Investment Reportsinvestmentreports.coHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 17 contacts → |
“Investment Reports is dedicated to bringing you comprehensive market intelligence in key business sectors across the world - now in partnership with Newsweek.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  The Surveillance Groupthesurveillancegroup.comHQ: Worcester, United KingdomReported employees: 51-200 | Worcester, United Kingdom | 51-200 | Exact match | 17 contacts → |
“The UK’s leading Surveillance, Intelligence and Open Source Investigations company.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Hartford Advisershartford.co.ukHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 16 contacts → |
“Hartford is a specialist strategic and market intelligence firm.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Diligencediligence.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 16 contacts → |
“Diligence is a private investigations firm, the output of our investigations help our clients make informed decisions bridging the gap between what they know and what they need to…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Globaldata Academiaglobaldata.comHQ: London, United KingdomReported employees: Not recorded | London, United Kingdom | Not recorded | Exact match | 15 contacts → |
“In an increasingly fast-moving, complex, and uncertain world, it’s never been harder for organizations to predict and navigate the future.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  UK Osint Communityosint.ukHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 13 contacts → |
“Bring together the UK OSINT community by gathering experts, practitioners, and learners in an informal environment to grow their OSINT capabilities, knowledge & network.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 167 company matches
Build a targeted audience, find relevant contacts and export available records to your workflow.
Free signup · 500 credits · limited free results
Open source intelligence firms: dataset insights
November 6, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
167 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 167 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: November 6, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Open source intelligence firms by metro
Questions about this company list
What does Exact match mean for open source intelligence firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many open source intelligence firms did RevenueBase find based in the United Kingdom?
The saved snapshot records 167 matching company records, 2,734 tracked contacts and 784 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: November 6, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Open source intelligence firms by geography
- Open source intelligence firms based in Paris, France
- Open source intelligence firms based in London, United Kingdom
- Open source intelligence firms based in New York, United States
- Open source intelligence firms based in Washington, United States
- Open source intelligence firms based in Brazil
- Open source intelligence firms based in Canada
- Open source intelligence firms based in France
- Open source intelligence firms based in India
- Open source intelligence firms based in Israel
- Open source intelligence firms based in Italy
- Open source intelligence firms based in the United States
Cite this list
RevenueBase Data Team. Top 25 open source intelligence firms based in the United Kingdom. Snapshot: November 6, 2026. https://revenuebase.ai/companies/open-source-intelligence-firms/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Open source intelligence firms based in Paris, France
- Open source intelligence firms based in London, United Kingdom
- Open source intelligence firms based in New York, United States
- Open source intelligence firms based in Washington, United States
- Open source intelligence firms based in Brazil
- Open source intelligence firms based in Canada
Company intelligence · public preview
Top 25 open source intelligence firms based in the United Kingdom
RevenueBase records 167 matching company records for open source intelligence firms based in the United Kingdom, with 2,734 tracked contacts and 784 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 6, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 open source intelligence firms based in the United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | BBC Monitoringmonitoring.bbc.co.uk HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 847 contacts → |
“BBC Monitoring provides trusted analysis of global media to help you make sense of complex narratives and world events.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Sibyllinesibylline.com HQ: Global, United KingdomReported employees: 201-500 | Global, United Kingdom | 201-500 | Exact match | 289 contacts → |
“Sibylline is the world’s leading private consultancy for geopolitical risk, intelligence, and strategic insight, dedicated to helping leaders and organisations anticipate change…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | FACTfact-uk.org.uk HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 126 contacts → |
“FACT are at the forefront of investigative and intelligence services, recognised by organisations, law enforcement, and governments worldwide.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Logicallylogically.ai HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 76 contacts → |
“Logically helps organizations make sense of complex information environments.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Netwatch Globalnetwatchglobal.com HQ: Birmingham, United KingdomReported employees: 51-200 | Birmingham, United Kingdom | 51-200 | Exact match | 74 contacts → |
“NetWatch Global® specialise in online investigations and are experts in social media and open source investigation.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Blackdot Solutionsblackdotsolutions.com HQ: Cambridge, United KingdomReported employees: 11-50 | Cambridge, United Kingdom | 11-50 | Exact match | 51 contacts → |
“Blackdot is the UK technology company behind Videris, the most powerful investigations software for fighting serious, organised and economic crimes.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Dragonfly From DOW Jonesdowjones.com HQ: London, United KingdomReported employees: Not recorded | London, United Kingdom | Not recorded | Exact match | 50 contacts → |
“Dragonfly is a geopolitical and security intelligence service for the world’s leading organisations.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Investigation Limitedinvestigation.eu HQ: Newark, United KingdomReported employees: 11-50 | Newark, United Kingdom | 11-50 | Exact match | 44 contacts → |
“Investigation Limited is a well-established company offering Corporate Intelligence Services globally.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Global Databaseglobaldatabase.com HQ: Northampton, United KingdomReported employees: 11-50 | Northampton, United Kingdom | 11-50 | Exact match | 43 contacts → |
“Global Database provides first-party company intelligence sourced directly from official government registries, covering 600 million companies globally.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Sigma7 Alacoalaco.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 40 contacts → |
“Alaco is a leading business intelligence firm.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | ICPicpcredit.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 39 contacts → |
“ICP is an independent, human-led research firm providing decision-grade intelligence on companies operating in markets where reliable data cannot be trusted.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | CYJAXcyjax.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 38 contacts → |
“CYJAX is an award-winning technology company and provider of digital threat intelligence services to international corporations, law enforcement agencies and the public sector.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Osint Industriesosint.industries HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 31 contacts → |
“OSINT Industries is an automated & scalable email, phone number & username checker tool for Law Enforcement, Private Investigators, Government and OSINT Practitioners.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | IMSLintelmsl.com HQ: Corsham, United KingdomReported employees: 11-50 | Corsham, United Kingdom | 11-50 | Exact match | 31 contacts → |
“IMSL offers the ProQual Level 1 & Level 3 Award in Open Source Intelligence (OSINT) Training Course as well as in depth Intelligence Analysis Training.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Ridgeway Informationridgeway-information.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 25 contacts → |
“We give our clients the confidence to identify opportunities, mitigate risks, tackle challenges and understand the landscapes they inhabit.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Briterbriter.co HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 24 contacts → |
“Briter is a research and intelligence firm focused on emerging markets.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Kiris Groupkirisgroup.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 24 contacts → |
“Our Chartered Security Professionals seamlessly integrate discreet and effective security into lifestyles and organisations.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Sastre Consultingsastreconsulting.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 21 contacts → |
“Sastre is a research consultancy, a global collective of multi-lingual corporate investigations professionals and public policy analysts who specialise in modern open source…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Grey Dynamicsgreydynamics.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 20 contacts → |
“Grey Dynamics is a private intelligence firm that offers apolitical analysis on topics such as security, geopolitics, defence and espionage.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Investment Reportsinvestmentreports.co HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 17 contacts → |
“Investment Reports is dedicated to bringing you comprehensive market intelligence in key business sectors across the world - now in partnership with Newsweek.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | The Surveillance Groupthesurveillancegroup.com HQ: Worcester, United KingdomReported employees: 51-200 | Worcester, United Kingdom | 51-200 | Exact match | 17 contacts → |
“The UK’s leading Surveillance, Intelligence and Open Source Investigations company.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Hartford Advisershartford.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 16 contacts → |
“Hartford is a specialist strategic and market intelligence firm.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Diligencediligence.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 16 contacts → |
“Diligence is a private investigations firm, the output of our investigations help our clients make informed decisions bridging the gap between what they know and what they need to…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Globaldata Academiaglobaldata.com HQ: London, United KingdomReported employees: Not recorded | London, United Kingdom | Not recorded | Exact match | 15 contacts → |
“In an increasingly fast-moving, complex, and uncertain world, it’s never been harder for organizations to predict and navigate the future.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | UK Osint Communityosint.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 13 contacts → |
“Bring together the UK OSINT community by gathering experts, practitioners, and learners in an informal environment to grow their OSINT capabilities, knowledge & network.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 167 company matches
Build a targeted audience, find relevant contacts and export available records to your workflow.
Free signup · 500 credits · limited free results
Open source intelligence firms: dataset insights
November 6, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
167 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 167 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: November 6, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Open source intelligence firms by metro
Questions about this company list
What does Exact match mean for open source intelligence firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many open source intelligence firms did RevenueBase find based in the United Kingdom?
The saved snapshot records 167 matching company records, 2,734 tracked contacts and 784 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: November 6, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Open source intelligence firms by geography
- Open source intelligence firms based in Paris, France
- Open source intelligence firms based in London, United Kingdom
- Open source intelligence firms based in New York, United States
- Open source intelligence firms based in Washington, United States
- Open source intelligence firms based in Brazil
- Open source intelligence firms based in Canada
- Open source intelligence firms based in France
- Open source intelligence firms based in India
- Open source intelligence firms based in Israel
- Open source intelligence firms based in Italy
- Open source intelligence firms based in the United States
Cite this list
RevenueBase Data Team. Top 25 open source intelligence firms based in the United Kingdom. Snapshot: November 6, 2026. https://revenuebase.ai/companies/open-source-intelligence-firms/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Open source intelligence firms based in Paris, France
- Open source intelligence firms based in London, United Kingdom
- Open source intelligence firms based in New York, United States
- Open source intelligence firms based in Washington, United States
- Open source intelligence firms based in Brazil
- Open source intelligence firms based in Canada