Company lists · Data refreshed September 2026
Top 25 Open access repository operators worldwide
RevenueBase identified 217 open access repository operators worldwide as of September 2026 and tracks 3,273 professional contacts across them, including 544 with verified work emails. The United States is the largest market and London the largest hub.
This list covers open access repository operators 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 access repository operators 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 access repository operators worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 636 contacts → | ||||
Strong evidence “Hindawi is no longer in operation and the journals are now part of Wiley’s open access journal portfolio.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 116 contacts → | ||||
Strong evidence “Dove Medical Press Ltd is an online open access academic publisher specialising in science, technology and especially medicine.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 94 contacts → | ||||
Partial evidence “SSRN is an online repository of scholarly research.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 83 contacts → | ||||
Indirect evidence “Crossref makes all kinds of research objects easy to find, cite, link, assess, and reuse.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 78 contacts → | ||||
Strong evidence “DOAJ is a unique and extensive index of diverse open access journals from around the world, driven by a growing community, committed to ensuring quality content is freely…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 65 contacts → | ||||
Indirect evidence “JSTOR is a digital library for scholars, researchers, and students.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 51 contacts → | ||||
Indirect evidence “OUR MISSION; FREE FLOW OF KNOWLEDGE Knowledge sharing is the core business of the Library.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 45 contacts → | ||||
Strong evidence “OpenAIRE AMKE is a non-profit organization whose mission is to promote open scholarship and to improve the discoverability, accessibility, shareability, reusability…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 43 contacts → | ||||
Indirect evidence “OpenEdition is an international digital publishing portal in the humanities and social sciences that brings together four platforms: OpenEdition Journals (e-journals), OpenEdition…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 40 contacts → | ||||
Indirect evidence “Érudit is a non-profit multi-university consortium.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 39 contacts → | ||||
Indirect evidence “Modern web technology offers important opportunities to expose, share and distribute valuable digital content, papers and research results.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 28 contacts → | ||||
Indirect evidence “We are a global community that shares a common interest: to ensure that research outputs and resources are openly available and connected so that their reuse can advance knowledge…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 27 contacts → | ||||
Strong evidence “MDPI is a leading global open access academic publishing company supporting academic communities since 1996.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 27 contacts → | ||||
Indirect evidence “Instituto de Investigaciones Económicas UNAM is a company based out of Circuito Centro Cultural, Coyoacan, Mexico City, Mexico.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 24 contacts → | ||||
Partial evidence “PKP is a multi-university and community-based initiative developing free and open source software (#FOSS) and conducting research to improve the quality and reach of scholarly…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 24 contacts → | ||||
Indirect evidence “GRIN Publishing, located in Munich, Germany, has specialized since its foundation in 1998 in the publication of academic papers.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 23 contacts → | ||||
Partial evidence “Discovery Garden builds and runs outstanding institutional repositories and digital collections for libraries, galleries, museums, and archives so they can organize and share…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 23 contacts → | ||||
Partial evidence “Since 2007, we have been developing and transforming digital archives and repository software, built and hosted repositories that serve millions of objects and hundreds of…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 16 contacts → | ||||
Partial evidence “Zendy has been created with an aim of radically facilitating access to academic literature.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 15 contacts → | ||||
Strong evidence “Strategic Partner in Global Academic Publishing AVES is an independent open-access publisher dedicated to providing high-quality publication services to academic and professional…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 15 contacts → | ||||
Partial evidence “arXiv is a curated research-sharing platform open to anyone.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 15 contacts → | ||||
Indirect evidence “GCRIS is a research and performance evaluation information system that enables searching and discovering all research outputs within universities' research ecosystem, associating…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 13 contacts → | ||||
Partial evidence “Dryad is an open data publishing platform and a community committed to the open availability and routine re-use of all research data.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 9 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 8 contacts → | ||||
Indirect evidence 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 access repository operators. 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 access repository operators.
- Partial evidence
- Its own public description names part of open access repository operators, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name open access repository operators. 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 217 open access repository operators worldwide
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Open access repository operators 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 access repository operators, 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 access repository operators are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “open access repository operators”. 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 access repository operators), 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 access repository operators, 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, 544 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 access repository operators by location
1 lists · largest firstEvery Open access repository operators 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 access repository operators, 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 access repository operators are there worldwide?
RevenueBase identified 217 open access repository operators 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?
Hindawi Publishing, headquartered in London, tops this list with the largest team on record.
Which country has the most open access repository operators?
The United States leads with 48 companies. Every open access repository operators list by country and city is linked on this page.
Which city has the most open access repository operators?
London leads with 8 headquartered companies, followed by New York (4) and Hyderabad (3).
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 544 verified decision-maker contacts tracked across these 217 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.