Company lists · Data refreshed September 2026

Top 25 International schools based in the United Kingdom

Name: International schools based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 1,022 companies tracked

RevenueBase identified 1,022 international schools headquartered in the United Kingdom as of September 2026 and tracks 22,798 professional contacts across them, including 6,443 with verified work emails. London is the largest hub.

This list covers international schools 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

1,022Companies

22,798Contacts tracked

6,443Verified emails

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The 25 largest international schools based in the United Kingdom

Ranked by team size

Top 25 of 1,022 international schools based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to international schools: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Cognita Schools	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	10001+	1,322 contacts →
	Indirect evidence “Thrive in a rapidly evolving world.” Source: RevenueBase Database · checked Sep 20, 2026
2	International Schools Partnership Limited	Indirect evidence	Wimbledon, United KingdomHQ checked Sep 20, 2026	10001+	696 contacts →
	Indirect evidence “Moved by curiosity and empowered by self-confidence, our students thrive throughout their lifetime.” Source: RevenueBase Database · checked Sep 20, 2026
3	ACS International Schools	Strong evidence	Cobham, United KingdomHQ checked Sep 20, 2026	201-500	602 contacts →
	Strong evidence “ACS International Schools educate over 3,700 student ages 2 - 18, from over 100 countries.” Source: RevenueBase Database · checked Sep 20, 2026
4	Millfield School	Partial evidence	Street, United KingdomHQ checked Sep 20, 2026	501-1,000	468 contacts →
	Partial evidence “Millfield is one of the UK's leading independent schools for girls and boys, aged 2-18, providing a fully rounded education.” Source: RevenueBase Database · checked Sep 20, 2026
5	Gedu Global Education	Indirect evidence	Greenford, United KingdomHQ checked Sep 20, 2026	1,001-5,000	406 contacts →
	Indirect evidence “GEDU Global Education (GEDU) is changing lives through education and making a fundamental difference to living standards and access to learning globally.” Source: RevenueBase Database · checked Sep 20, 2026
6	International House World Organisation	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	n/a	297 contacts →
	Strong evidence “The International House World Organisation (IHWO) is one of the largest and oldest groups of language schools in the world.” Source: RevenueBase Database · checked Sep 20, 2026
7	American School In London	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	201-500	273 contacts →
	Strong evidence “The American School in London is an independent, college-preparatory, preK-12 day school, providing an exceptional American education to an international student body in the heart…” Source: RevenueBase Database · checked Sep 20, 2026
8	Taunton School	Partial evidence	Taunton, United KingdomHQ checked Sep 20, 2026	201-500	269 contacts →
	Partial evidence “Taunton School is 175 years old and is an independent school for over boys and girls aged 0-18 years, with approximately 300 boarders.” Source: RevenueBase Database · checked Sep 20, 2026
9	English Path	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	201-500	257 contacts →
	Indirect evidence “EP is a global education provider delivering exceptional learning experiences to students across the world.” Source: RevenueBase Database · checked Sep 20, 2026
10	Haberdashers' Academies Trust South	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	501-1,000	223 contacts →
	Partial evidence “Haberdashers' Academies Trust South is a strong network of nine schools - five primary and four secondary based in south London and Kent.” Source: RevenueBase Database · checked Sep 20, 2026
11	Esms Erskine Stewart's Melville Schools	Partial evidence	Edinburgh, United KingdomHQ checked Sep 20, 2026	201-500	221 contacts →
	Partial evidence “ESMS is a family of independent schools for children, aged 3-18 years, in Edinburgh.” Source: RevenueBase Database · checked Sep 20, 2026
12	Tasis England	Partial evidence	Thorpe, United KingdomHQ checked Sep 20, 2026	201-500	209 contacts →
	Partial evidence “TASIS England welcomes day and boarding students aged 4 to 18 to an exceptional international learning experience.” Source: RevenueBase Database · checked Sep 20, 2026
13	Lycée Français Charles DE Gaulle DE Londres	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	201-500	208 contacts →
	Indirect evidence “We have been offering world-class education for over a century, giving pupils from 3 to 18 years old the option of French, Bilingual and British curricula.” Source: RevenueBase Database · checked Sep 20, 2026
14	University College School	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	201-500	201 contacts →
	Partial evidence “University College School was founded in Gower Street in 1830 as part of University College, London and moved to generous buildings in Hampstead in 1907.” Source: RevenueBase Database · checked Sep 20, 2026
15	Dukes Education	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	1,001-5,000	185 contacts →
	Partial evidence “Dukes Education is a family of schools and education organisations based in the UK and Europe.” Source: RevenueBase Database · checked Sep 20, 2026
16	Cats Global Schools	Partial evidence	Cambridge, United KingdomHQ checked Sep 20, 2026	1,001-5,000	176 contacts →
	Partial evidence “CATS Global Schools is a leading education group committed to inspiring the next generation of world shapers.” Source: RevenueBase Database · checked Sep 20, 2026
17	Southbank International School	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	201-500	172 contacts →
	Strong evidence “Southbank International School is an International Baccalaureate (IB) World School for 3-18 year olds with campuses in Hampstead, Kensington and Westminster in London.” Source: RevenueBase Database · checked Sep 20, 2026
18	Framlingham College	Partial evidence	Framlingham, United KingdomHQ checked Sep 20, 2026	201-500	143 contacts →
	Partial evidence “Equipping our pupils to thrive as global citizens in their adult worlds"- Independent School for Girls and Boys aged 3 - 18 The College believes that breadth of opportunity is…” Source: RevenueBase Database · checked Sep 20, 2026
19	Royal Grammar School Newcastle	Partial evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 20, 2026	201-500	138 contacts →
	Partial evidence “Although the exact date is subject to debate, tradition holds that the Newcastle upon Tyne Royal Grammar School was founded in 1525.” Source: RevenueBase Database · checked Sep 20, 2026
20	Oxford Royale	Indirect evidence	Oxford, United KingdomHQ checked Sep 20, 2026	11-50	133 contacts →
	Indirect evidence “At Oxford Royale, we believe education goes beyond the classroom.” Source: RevenueBase Database · checked Sep 20, 2026
21	King's Interhigh	Strong evidence	Worldwide, United KingdomHQ checked Sep 20, 2026	51-200	132 contacts →
	Strong evidence “King’s InterHigh is an online independent British international school.” Source: RevenueBase Database · checked Sep 20, 2026
22	Stephen Perse Foundation	Partial evidence	Cambridge, United KingdomHQ checked Sep 20, 2026	201-500	130 contacts →
	Partial evidence “The Stephen Perse Cambridge is a family of independent schools educating boys and girls from Nursery to Sixth Form across Cambridge and Saffron Walden.” Source: RevenueBase Database · checked Sep 20, 2026
23	St. Clare's, Oxford	Indirect evidence	Oxford, United KingdomHQ checked Sep 20, 2026	51-200	123 contacts →
	Indirect evidence “St Clare's, Oxford welcomes students from all over the world.” Source: RevenueBase Database · checked Sep 20, 2026
24	Stafford House International	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	116 contacts →
	Partial evidence “Stafford House is part of Cats Global Schools and has been successfully running English language programmes for more than 60 years.” Source: RevenueBase Database · checked Sep 20, 2026
25	Maiden Erlegh Trust	Partial evidence	Reading, United KingdomHQ checked Sep 20, 2026	501-1,000	113 contacts →
	Partial evidence “Maiden Erlegh Trust is a community of schools committed to delivering high-quality, inclusive education.” Source: RevenueBase Database · checked Sep 20, 2026

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 schools. 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 schools.
Partial evidence: Its own public description names part of international schools, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name international schools. 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 1,022 international schools based in the United Kingdom

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International schools based in the United Kingdom at a glance

As of Sep 20, 2026

28.3%Verified-email coverage

22.3Average contacts per company

11-50Median size (employees)

21.2%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

427

11-50

259

51-200

209

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 1,022 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 schools, 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 schools”. 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 schools), 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 schools, 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, 6,443 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 schools by metro

International schools in London217

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 schools, 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 schools are there based in the United Kingdom?

RevenueBase identified 1,022 international schools 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?

Cognita Schools, headquartered in London, tops this list with the largest team on record.

Which city has the most international schools?

London leads with 217 headquartered companies, followed by Manchester (18) and Birmingham (16).

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 6,443 verified decision-maker contacts tracked across these 1,022 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.