Company lists · Data refreshed September 2026
Top 25 Open educational resource publishers worldwide
RevenueBase identified 466 open educational resource publishers worldwide as of September 2026 and tracks 15,518 professional contacts across them, including 4,023 with verified work emails. The United States is the largest market and London the largest hub.
This list covers open educational resource publishers 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 open educational resource publishers 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.
The 25 largest open educational resource publishers worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 7,204 contacts → | ||||
Indirect evidence “Part of the University of Oxford.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,374 contacts → | ||||
Partial evidence “Khan Academy is a non-profit educational organization created in 2006 by educator Salman Khan to provide "a free, world-class education for anyone, anywhere".” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 200 contacts → | ||||
Partial evidence “Founded in 2013, Kortext is the world-leading student experience and engagement expert, pioneering digitally enhanced teaching and learning in the global higher education…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 188 contacts → | ||||
Strong evidence “Founded in 2004, IntechOpen, the world's leading publisher of Open Access books - Built by scientists, for scientists provides a collaborative environment for peer-reviewed…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 186 contacts → | ||||
Indirect evidence “Lelivrescolaire.fr c'est avant tout une communauté de 5 professeurs et une équipe de 80 lyonnais passionnés.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 180 contacts → | ||||
Partial evidence “Shaping the future of our education together is what we at Macmillan South Africa pride ourselves on.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 129 contacts → | ||||
Strong evidence “At CK-12 Foundation, we’re revolutionizing education by providing free, high-quality learning resources for students and educators globally.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 117 contacts → | ||||
Partial evidence “Cognella® is redefining academic publishing by creating teacher-driven, student-centric higher education course materials in print and digital formats under three imprints…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 114 contacts → | ||||
Indirect evidence “Né du rapprochement des Éditions Belin et des Puf (les Presses universitaires de France), deux maisons emblématiques dans le domaine de l’éducation, de la connaissance certifiée…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 114 contacts → | ||||
Indirect evidence “Knowledge Channel Foundation, Inc (KCFI) is a non-government, not-for-profit organization that works to help uplift the life of the Filipino through media and technology.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 110 contacts → | ||||
Partial evidence “Perlego was born to provide an affordable (and sustainable) textbook solution for learners around the world, by partnering with publishers and removing the costs of print…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 108 contacts → | ||||
Indirect evidence “Cengage helps instructors, learners and institutions thrive with course materials built around their needs.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 89 contacts → | ||||
Indirect evidence “We are a nonprofit organization founded and run by educators.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 85 contacts → | ||||
Indirect evidence “62 Years' Legacy in Publishing!” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 80 contacts → | ||||
Indirect evidence “Lumen Learning’s mission is to enable unprecedented learning for all students.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 68 contacts → | ||||
Partial evidence “OpenStax is on a mission to increase educational access for all.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 64 contacts → | ||||
Partial evidence “Cambridge Scholars Publishing is an independent academic publisher, committed to providing a forward-thinking publishing service that champions original thinking, whilst ensuring…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 63 contacts → | ||||
Partial evidence “Great River Learning is the higher education textbook company you've been looking for: we publish for the way you want to teach.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 54 contacts → | ||||
Strong evidence “Norwegian Digital Learning Arena (NDLA) is a joint county enterprise offering open digital learning assets for upper secondary education.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 48 contacts → | ||||
Strong evidence “Telesapiens is an Educational Publisher focused on the didactic content production for undergraduate, postgraduate and technical training courses and disciplines, with numerous…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 46 contacts → | ||||
Partial evidence “For eKitabu, the educational impact of books is our foundation.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 42 contacts → | ||||
Partial evidence “Winner of the 2019 "Dutch Chamber of Commerce Innovation Award" Winner of the 2023 "NABC Doing Business in Africa Award" Educational books are essential to all students around the…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 39 contacts → | ||||
Indirect evidence “Federica Weblearning, Centro d’Ateneo dell’Università di Napoli Federico II, è da dieci anni trendsetter nell’innovazione della didattica multimediale.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 39 contacts → | ||||
Indirect evidence “Samfundslitteratur er et forlag, der udvikler og udgiver undervisningsmaterialer til studerende på de videregående uddannelser.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 36 contacts → | ||||
Indirect evidence “Skyepack works with schools, departments, and faculty members to develop custom course content, geared toward the specific learning objectives, student population, and teaching…” 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: open educational resource publishers. 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 open educational resource publishers.
- Partial evidence
- Its own public description names part of open educational resource publishers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name open educational resource publishers. 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 466 open educational resource publishers worldwide
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Open educational resource publishers worldwide at a glance
As of Sep 20, 2026Companies by employee count
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 open educational resource publishers, 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 open educational resource publishers are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “open educational resource publishers”. 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 open educational resource publishers), 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 open educational resource publishers, 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, 4,023 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.
Open educational resource publishers by location
2 lists · largest firstEvery Open educational resource publishers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
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 open educational resource publishers, 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 open educational resource publishers are there worldwide?
RevenueBase identified 466 open educational resource publishers 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?
Oxford University Press, headquartered in Oxford, tops this list with the largest team on record.
Which country has the most open educational resource publishers?
The United States leads with 76 companies, followed by the United Kingdom (31). Every open educational resource publishers list by country and city is linked on this page.
Which city has the most open educational resource publishers?
London leads with 20 headquartered companies, followed by New York (5) and Singapore (5).
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 4,023 verified decision-maker contacts tracked across these 466 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.