Company lists · Data refreshed September 2026
Top 25 International non-profits based in the United Kingdom
RevenueBase identified 1,000 international non-profits headquartered in the United Kingdom as of September 2026 and tracks 57,379 professional contacts across them, including 12,433 with verified work emails. London is the largest hub.
This list covers international non-profits headquartered in the United Kingdom, 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.
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 international non-profits based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 12,037 contacts → | ||||
Indirect evidence “World Vision is the largest child-focused private charity in the world.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 7,703 contacts → | ||||
Partial evidence “Plan International is an independent development and humanitarian organisation that stands with girls to tear down barriers, save lives and build a world where equality for girls…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 7,001 contacts → | ||||
Indirect evidence “Oxfam is a vibrant global movement of dedicated people fighting poverty - together.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 3,858 contacts → | ||||
Indirect evidence “For over 150 years, the British Red Cross has been here for humanity.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 1,185 contacts → | ||||
Indirect evidence “Looking to work for a charity that has Jesus at its heart?” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 825 contacts → | ||||
Partial evidence “Adam Smith International is a global advisory company that works locally to transform lives by making economies stronger, societies more stable, and governments more effective.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 822 contacts → | ||||
Partial evidence “We are an international development consultancy that works in partnership with leaders providing analytical and practical policy expertise through our global network to support…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 781 contacts → | ||||
Indirect evidence “In a world where media can be divisive and untrustworthy, we believe in the power of media and communication to do good.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 757 contacts → | ||||
Indirect evidence “We are Restless Development, the youth-led development agency.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 629 contacts → | ||||
Partial evidence “Human Appeal is a UK-based international humanitarian and development organisation delivering life-saving aid and sustainable development programmes in over 30 countries across…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 576 contacts → | ||||
Indirect evidence “Fauna & Flora's work spans across the globe, with over 100 projects in more than 40 countries.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 562 contacts → | ||||
Partial evidence “We are an international development organisation putting ingenious ideas to work so people in poverty can change their world.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 475 contacts → | ||||
Partial evidence “Crown Agents is an international development organisation that works with leaders across the globe to accelerate self-sufficiency and prosperity.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 458 contacts → | ||||
Indirect evidence “We are the official Catholic aid agency for England and Wales.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 450 contacts → | ||||
Indirect evidence “In 1993, a community in Nottingham, moved by the devastation of the Bosnian war, sprang into action.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 303 contacts → | ||||
Strong evidence “Muslim Aid is an International Not-For-Profit providing support to communities around the world affected by disasters, conflict or endemic poverty without regard to their social…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 278 contacts → | ||||
Indirect evidence “GVI is an award-winning social enterprise that runs high-impact conservation and community development programs in extraordinary locations across the world.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 248 contacts → | ||||
Indirect evidence “We are an independent social change organisation, working to support and speed up the transition to a more equitable and just future, free from poverty, where people and planet…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 245 contacts → | ||||
Partial evidence “The International Institute for Environment and Development (IIED) is a global leader in sustainable development.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 222 contacts → | ||||
Indirect evidence “We are a global nonprofit empowering entrepreneurs to do the most good possible with their charitable giving - Members pledge to give a small percentage of their personal proceeds…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 202 contacts → | ||||
Strong evidence “Pharo Foundation is a dynamic self-reliant non-profit organisation committed to fostering self-sufficiency in Africa.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 173 contacts → | ||||
Strong evidence “Lead is a non-profit organisation dedicated to building leadership capacity for sustainable development.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 168 contacts → | ||||
Partial evidence “Chemonics UK is a leader in global sustainable development and part of Chemonics International's global network of specialists.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 166 contacts → | ||||
Indirect evidence “United Purpose (UP) is a movement of people and organisations that strive to end poverty and inequality across the globe.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 162 contacts → | ||||
Partial evidence “Saferworld is an independent international organisation working to prevent violent conflict and build safer lives.” 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: international non-profits. 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 international non-profits.
- Partial evidence
- Its own public description names part of international non-profits, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name international non-profits. 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 1,000 international non-profits based in the United Kingdom
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International non-profits based in the United Kingdom at a glance
As of Sep 20, 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 1,000 companies.
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 international non-profits, 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.
- What qualifies
- Companies headquartered in the United Kingdom whose own description of what they do matches “international non-profits”. 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 international non-profits), 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 international non-profits, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
- 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, 12,433 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.
International non-profits by metro
- International non-profits in London510
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 international non-profits, 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 international non-profits are there based in the United Kingdom?
RevenueBase identified 1,000 international non-profits headquartered in the United Kingdom 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?
World Vision, headquartered in Uxbridge, tops this list with the largest team on record.
Which city has the most international non-profits?
London leads with 510 headquartered companies, followed by Birmingham (24) and Cambridge (19).
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 12,433 verified decision-maker contacts tracked across these 1,000 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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International non-profits by geography
- International non-profits based in Belo Horizonte, Brazil
- International non-profits based in Porto Alegre, Brazil
- International non-profits based in Rio De Janeiro, Brazil
- International non-profits based in Sao Paulo, Brazil
- International non-profits based in Montreal, Canada
- International non-profits based in Ottawa, Canada
- International non-profits based in Toronto, Canada
- International non-profits based in Vancouver, Canada
- International non-profits based in Lyon, France
- International non-profits based in Paris, France
- International non-profits based in Bengaluru, India
- International non-profits based in Mumbai, India
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.
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