Company lists · Data refreshed September 2026

Top 25 Independent high schools worldwide

Name: Independent high schools worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 11,298 companies tracked

RevenueBase identified 11,298 independent high schools worldwide as of September 2026 and tracks 346,915 professional contacts across them, including 120,115 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers independent high schools worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026. Country and city lists for independent high schools follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

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

11,298Companies

346,915Contacts tracked

120,115Verified emails

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The 25 largest independent high schools worldwide

Ranked by team size

Top 25 of 11,298 independent high schools worldwide, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to independent high 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	Charlotte-Mecklenburg Schools	Strong evidence	Charlotte, NC, United StatesHQ checked Sep 20, 2026	10001+	14,181 contacts →
	Strong evidence “The mission of Charlotte-Mecklenburg Schools is to create an innovative, inclusive, student-centered environment that supports the development of independent learners.” Source: RevenueBase Database · checked Sep 20, 2026
2	Idea Public Schools	Partial evidence	Weslaco, TX, United StatesHQ checked Sep 20, 2026	10001+	4,988 contacts →
	Partial evidence “IDEA Public Schools believes that each child can go to college.” Source: RevenueBase Database · checked Sep 20, 2026
3	Harmony Public Schools	Partial evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	1,001-5,000	2,933 contacts →
	Partial evidence “Harmony Public Schools is a network of PreK-12 college preparatory public charter schools across Texas.” Source: RevenueBase Database · checked Sep 20, 2026
4	Kipp Texas Public Schools	Partial evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	1,001-5,000	2,519 contacts →
	Partial evidence “KIPP Texas Public Schools is an open-enrollment, free public charter school network of 54 schools with more than Pre-K – 12 students across the state and an impact of 30 years in…” Source: RevenueBase Database · checked Sep 20, 2026
5	Okyanus Kolejleri	Indirect evidence	İstanbul, TürkiyeHQ checked Sep 20, 2026	1,001-5,000	1,891 contacts →
	Indirect evidence “Okyanus Kolejleri kurucusu Orhan ÖZBEY, 1979 yılında eğitim sektörüne giriş yaptı.” Source: RevenueBase Database · checked Sep 20, 2026
6	Uplift Education	Strong evidence	Dallas, TX, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,695 contacts →
	Strong evidence “Uplift Education (Uplift) is a 501(c)(3) nonprofit organization that operates a network of 45 high-performing, tuition-free, public charter schools serving students in…” Source: RevenueBase Database · checked Sep 20, 2026
7	International Leadership Of Texas	Partial evidence	Richardson, TX, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,316 contacts →
	Partial evidence “International Leadership of Texas (ILTexas) is a free, public charter school serving K-12 students across 26 campuses in the DFW, Houston, Liberty County, and College Station…” Source: RevenueBase Database · checked Sep 20, 2026
8	Aldar Education	Partial evidence	Yas Island, United Arab EmiratesHQ checked Sep 20, 2026	5,001-10,000	1,270 contacts →
	Partial evidence “Aldar Education is Abu Dhabi’s leading private K-12 education group and one of the UAE’s most established education providers serving over students across a network of 27 schools…” Source: RevenueBase Database · checked Sep 20, 2026
9	Imagine Schools	Partial evidence	United StatesHQ checked Sep 20, 2026	1,001-5,000	1,214 contacts →
	Partial evidence “Imagine Schools is a national non-profit network of 54 public charter campuses educating approximately students in 8 states and the District of Columbia.” Source: RevenueBase Database · checked Sep 20, 2026
10	Santa Rosa County Public Schools	Partial evidence	Milton, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,191 contacts →
	Partial evidence “A family of educators that strives to provide a high quality education for all students through a comprehensive curriculum from pre-kindergarten through adult programs.” Source: RevenueBase Database · checked Sep 20, 2026
11	Sociedad DE Instrucción Primaria DE Santiago	Indirect evidence	Santiago, ChileHQ checked Sep 20, 2026	1,001-5,000	1,183 contacts →
	Indirect evidence “SIP.” Source: RevenueBase Database · checked Sep 20, 2026
12	Aspire Public Schools	Partial evidence	Oakland, CA, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,147 contacts →
	Partial evidence “Aspire now has 36 community-based schools serving over students in California.” Source: RevenueBase Database · checked Sep 20, 2026
13	Responsive Education Solutions	Partial evidence	Lewisville, TX, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,103 contacts →
	Partial evidence “Our story began in 1998 when we, as a non-profit organization, were granted charters to open 15 dropout recovery and prevention schools.” Source: RevenueBase Database · checked Sep 20, 2026
14	Great Hearts Academies	Partial evidence	Phoenix, AZ, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,093 contacts →
	Partial evidence “Since its inception, Great Hearts has been on a mission to become a national leader in public charter schools.” Source: RevenueBase Database · checked Sep 20, 2026
15	Legacy Traditional Schools	Indirect evidence	Chandler, AZ, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,087 contacts →
	Indirect evidence “Ignite your desire to be the best!” Source: RevenueBase Database · checked Sep 20, 2026
16	Mastery Schools	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,031 contacts →
	Partial evidence “Mastery Charter Schools and Mastery Schools of Camden form a non-profit school network of charter, turnaround and renaissance schools in Philadelphia, PA and Camden, NJ, serving…” Source: RevenueBase Database · checked Sep 20, 2026
17	Basis ED	Partial evidence	Scottsdale, AZ, United StatesHQ checked Sep 20, 2026	1,001-5,000	928 contacts →
	Partial evidence “BASIS Charter Schools have been raising the level of American education to the highest international standards for more than 20 years, since our first school opened in 1998.” Source: RevenueBase Database · checked Sep 20, 2026
18	Kipp Foundation	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	n/a	878 contacts →
	Indirect evidence “Work Hard.” Source: RevenueBase Database · checked Sep 20, 2026
19	Plymouth-Canton Community Schools	Strong evidence	Plymouth, MI, United StatesHQ checked Sep 20, 2026	1,001-5,000	852 contacts →
	Strong evidence “Plymouth-Canton Community Schools operates 15 elementary schools, five middle schools, three high schools & an alternative high school program.” Source: RevenueBase Database · checked Sep 20, 2026
20	Noble Schools	Strong evidence	Chicago, IL, United StatesHQ checked Sep 20, 2026	1,001-5,000	836 contacts →
	Strong evidence “Noble is a nonprofit organization that runs 17 charter public high schools and one middle school in the city of Chicago.” Source: RevenueBase Database · checked Sep 20, 2026
21	Kipp Socal Public Schools	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 20, 2026	1,001-5,000	806 contacts →
	Partial evidence “KIPP SoCal Public Schools is a nonprofit organization that operates 24 tuition-free, open-enrollment charter public schools, within 20 Local Education Agencies, educating more…” Source: RevenueBase Database · checked Sep 20, 2026
22	Caulfield Grammar School	Strong evidence	Melbourne, AustraliaHQ checked Sep 20, 2026	501-1,000	801 contacts →
	Strong evidence “Established in 1881, Caulfield Grammar School is a leading independent co-educational school in Melbourne, Australia.” Source: RevenueBase Database · checked Sep 20, 2026
23	Stratford School	Strong evidence	Campbell, CA, United StatesHQ checked Sep 20, 2026	1,001-5,000	773 contacts →
	Strong evidence “Stratford School, part of Spring Education Group, is a leading independent WASC-accredited private school in California offering courses from preschool through 12th grade with a…” Source: RevenueBase Database · checked Sep 20, 2026
24	Kipp NEW Jersey	Partial evidence	Newark, NJ, United StatesHQ checked Sep 20, 2026	501-1,000	764 contacts →
	Partial evidence “About KIPP New Jersey KIPP New Jersey is part of the nationally recognized “Knowledge Is Power Program” network of free, open-enrollment, college-preparatory public schools…” Source: RevenueBase Database · checked Sep 20, 2026
25	Medicana Eğitim Grubu	Indirect evidence	İstanbul, TürkiyeHQ checked Sep 20, 2026	201-500	759 contacts →
	Indirect evidence “Eğitimde Dönüşümün Yeni Değeri” 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: independent high 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 independent high schools.
Partial evidence: Its own public description names part of independent high schools, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name independent high 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 11,298 independent high schools worldwide

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Independent high schools worldwide at a glance

As of Sep 20, 2026

34.6%Verified-email coverage

30.7Average contacts per company

11-50Median size (employees)

1.0%Largest-city concentration · Sao Paulo

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

2,710

11-50

3,713

51-200

3,555

201-500

808

501-1,000

191

1,001-5,000

162

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among independent high 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.
Coverage: Every country. Country and city lists for independent high schools are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “independent high 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 independent high 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 independent high schools, and records with no verified work email.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 120,115 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.

Independent high schools by location

46 lists · largest first

Every Independent high schools list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 independent high 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 independent high schools are there worldwide?

RevenueBase identified 11,298 independent high schools worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Charlotte-Mecklenburg Schools, headquartered in Charlotte, tops this list with the largest team on record.

Which country has the most independent high schools?

The United States leads with 5,596 companies, followed by Brazil (826) and the United Kingdom (382). Every independent high schools list by country and city is linked on this page.

Which city has the most independent high schools?

Sao Paulo leads with 118 headquartered companies, followed by New York (105) and Houston (88).

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 120,115 verified decision-maker contacts tracked across these 11,298 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.