Company lists · Data refreshed September 2026

Top 25 International schools based in Thailand

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

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 236 companies tracked

RevenueBase identified 236 international schools headquartered in Thailand as of September 2026 and tracks 7,879 professional contacts across them, including 1,790 with verified work emails. Bangkok is the largest hub.

This list covers international schools headquartered in Thailand, 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

236Companies

7,879Contacts tracked

1,790Verified emails

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The 25 largest international schools based in Thailand

Ranked by team size

Top 25 of 236 international schools based in Thailand, 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	Bangkok Patana School	Partial evidence	Bangkok City, ThailandHQ checked Sep 20, 2026	501-1,000	410 contacts →
	Partial evidence “Established in 1957, Bangkok Patana School is the original and only not-for-profit British school in Bangkok.” Source: RevenueBase Database · checked Sep 20, 2026
2	Nist International School	Strong evidence	Khlong Toei Nuea, ThailandHQ checked Sep 20, 2026	501-1,000	326 contacts →
	Strong evidence “The first and only full, not-for-profit International Baccalaureate (IB) World School in Bangkok, NIST International School was established in 1992 with the support of the United…” Source: RevenueBase Database · checked Sep 20, 2026
3	Sisb Schools	Strong evidence	Bangkok, ThailandHQ checked Sep 20, 2026	501-1,000	279 contacts →
	Strong evidence “SISB is a leading international school in Thailand providing education from Nursery to Sixth Form (Ages 2-18 ).” Source: RevenueBase Database · checked Sep 20, 2026
4	Harrow International School Bangkok	Strong evidence	Don Mueang, ThailandHQ checked Sep 20, 2026	201-500	250 contacts →
	Strong evidence “Harrow International School Bangkok is organised into two sections: Lower School, which comprises the Early Years Centre (from Little Lions to K2) and the Pre Prep (Infants and…” Source: RevenueBase Database · checked Sep 20, 2026
5	Shrewsbury International School Bangkok Riverside	Strong evidence	Bangkok, ThailandHQ checked Sep 20, 2026	201-500	238 contacts →
	Strong evidence “Opened in 2003 and founded in the traditions of our UK sister school, Shrewsbury International School Bangkok Riverside is one of the leading independent schools in South East…” Source: RevenueBase Database · checked Sep 20, 2026
6	RIS Ruamrudee International School	Strong evidence	Bangkok, ThailandHQ checked Sep 20, 2026	201-500	229 contacts →
	Strong evidence “RIS is one of Thailand's longest-running international schools."Ruamrudee." Thai for "Union of Hearts," perfectly captures this Catholic school's philosophy of welcoming all…” Source: RevenueBase Database · checked Sep 20, 2026
7	Anglo Singapore International School	Strong evidence	Bangkok, ThailandHQ checked Sep 20, 2026	201-500	222 contacts →
	Strong evidence “Anglo Singapore International School was created to provide a international holistic programme for students growing up in an increasingly global society.” Source: RevenueBase Database · checked Sep 20, 2026
8	St. Andrews International Schools, Thailand	Indirect evidence	Bangkok, ThailandHQ checked Sep 20, 2026	501-1,000	195 contacts →
	Indirect evidence “St.” Source: RevenueBase Database · checked Sep 20, 2026
9	KIS International School	Strong evidence	Bangkok, ThailandHQ checked Sep 20, 2026	51-200	184 contacts →
	Strong evidence “KIS International School Bangkok centrally located in Bangkok, Thailand is the only school in Bangkok to offer all four International Baccalaureate programmes.” Source: RevenueBase Database · checked Sep 20, 2026
10	International School Bangkok	Strong evidence	Amphur Pakkret, ThailandHQ checked Sep 20, 2026	501-1,000	177 contacts →
	Strong evidence “Established in 1951, International School Bangkok (ISB) is an independent, non-profit, co-educational day school serving a community of over 60 nationalities from Pre-Kindergarten…” Source: RevenueBase Database · checked Sep 20, 2026
11	British International School, Phuket	Strong evidence	A. Muang, ThailandHQ checked Sep 20, 2026	201-500	167 contacts →
	Strong evidence “British International School Phuket (BISP) is a leading British day and boarding school in Thailand (est.” Source: RevenueBase Database · checked Sep 20, 2026
12	Wells International School	Strong evidence	Bangkok, ThailandHQ checked Sep 20, 2026	51-200	153 contacts →
	Strong evidence “Wells International School, a branch of the EverClever Education Group and a member of the International Schools Association of Thailand, is an international school that consists…” Source: RevenueBase Database · checked Sep 20, 2026
13	Bangkok Prep	Strong evidence	Bangkok, ThailandHQ checked Sep 20, 2026	201-500	137 contacts →
	Strong evidence “Bangkok Prep (Bangkok International Preparatory & Secondary School) is one of the leading independent international schools in Thailand.” Source: RevenueBase Database · checked Sep 20, 2026
14	Kajonkietsuksa School	Partial evidence	Phuket, ThailandHQ checked Sep 20, 2026	51-200	132 contacts →
	Partial evidence “Welcome to Kajonkietsuksa School, Phuket's premier bilingual school.” Source: RevenueBase Database · checked Sep 20, 2026
15	Wellington College International School Bangkok	Strong evidence	Saphan Soong District, ThailandHQ checked Sep 20, 2026	51-200	127 contacts →
	Strong evidence “Wellington College International School Bangkok, the first Wellington College established in ASEAN, follows the standards set forth by the founding school, Wellington College in…” Source: RevenueBase Database · checked Sep 20, 2026
16	DBS Denla British School	Partial evidence	Nonthaburi, ThailandHQ checked Sep 20, 2026	51-200	122 contacts →
	Partial evidence “DBS Denla British School is a legacy of Denla Group, which has over 46 years of education expertise.” Source: RevenueBase Database · checked Sep 20, 2026
17	UWC Thailand	Strong evidence	Thalang, ThailandHQ checked Sep 20, 2026	51-200	117 contacts →
	Strong evidence “Encircled by rubber tree plantations and virgin rainforest, United World College Thailand International School sits nestled in the foothills of Phuket’s green-capped mountains…” Source: RevenueBase Database · checked Sep 20, 2026
18	Brighton College Bangkok	Partial evidence	Bangkok, ThailandHQ checked Sep 20, 2026	51-200	107 contacts →
	Partial evidence “Brighton College was recently named as England's Independent School of the Decade by The Sunday Times, for achieving the very best academic results and a stellar record of entry…” Source: RevenueBase Database · checked Sep 20, 2026
19	Kpis International School	Strong evidence	Bangkhen, ThailandHQ checked Sep 20, 2026	51-200	99 contacts →
	Strong evidence “KPIS International School is a Nursery - Grade 12 school in Bangkok for 2-18 years old and provides unique learning experiences that build skills for an ever-changing world.” Source: RevenueBase Database · checked Sep 20, 2026
20	Concordian International School	Strong evidence	Bangkok, ThailandHQ checked Sep 20, 2026	201-500	94 contacts →
	Strong evidence “Concordian International School is a Pre-K to Grade 12 IB World School located in Bangkaew, Bangplee, Bangkok, Samutprakarn, Thailand; which is around 10 minutes to central…” Source: RevenueBase Database · checked Sep 20, 2026
21	King's College International School Bangkok	Strong evidence	Bang Phongphang, ThailandHQ checked Sep 20, 2026	51-200	93 contacts →
	Strong evidence “King’s College International School Bangkok is a King’s College School, Wimbledon International School.” Source: RevenueBase Database · checked Sep 20, 2026
22	Australian International School Bangkok	Strong evidence	Klong Toey, ThailandHQ checked Sep 20, 2026	51-200	90 contacts →
	Strong evidence “At the Australian International School Bangkok we aim to develop an enriching learning environment for all students, where all members of the school community are valued for their…” Source: RevenueBase Database · checked Sep 20, 2026
23	Unity Concord International School	Strong evidence	Amphur Sarapee, ThailandHQ checked Sep 20, 2026	201-500	82 contacts →
	Strong evidence “Unity Concord International School (UCIS) was opened in 2017 by Amporn and Chugait Garmolgomut.” Source: RevenueBase Database · checked Sep 20, 2026
24	Verso International School	Strong evidence	Samut Prakan, ThailandHQ checked Sep 20, 2026	51-200	77 contacts →
	Strong evidence “VERSO is a pioneering, innovative international school with vision to inspire everyone to be Future Ready and to build a global community of Citizen Designers VERSO delivers an…” Source: RevenueBase Database · checked Sep 20, 2026
25	International Pioneers School IPS	Strong evidence	Bangkok, ThailandHQ checked Sep 20, 2026	51-200	77 contacts →
	Strong evidence “INTERNATIONAL PIONEERS SCHOOL (IPS) was established in January 1998, initially as a kindergarten school, which subsequently expanded to become an international school…” 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 236 international schools based in Thailand

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International schools based in Thailand at a glance

As of Sep 20, 2026

22.7%Verified-email coverage

33.4Average contacts per company

51-200Median size (employees)

34.3%Largest-city concentration · Bangkok

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for Thailand, so it is reported there. Company counts and contact totals on this page are exact for Thailand, over 236 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 Thailand 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 Thailand 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, 1,790 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 Bangkok81

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 Thailand?

RevenueBase identified 236 international schools headquartered in Thailand 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?

Bangkok Patana School, headquartered in Bangkok City, tops this list with the largest team on record.

Which city has the most international schools?

Bangkok leads with 81 headquartered companies, followed by Bangkok City (16) and Chiang Mai (13).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,790 verified decision-maker contacts tracked across these 236 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.