Crossref

01 · Who’s behind it

Who runs Crossref

Crossref crossref.org

Crossref is open infrastructure linking the world's research. 26,500 members, 171 countries, 2.1 billion monthly API queries.

Wikidata: one of the official Digital Object Identifier Registration Agencies of the International DOI Foundation

Company

No imprint we could read

Online since

Not in the Internet Archive

Audience

Top 10K In English

02 · Privacy

What Crossref tracks

What the homepage loads before you accept or decline cookies. A cookie banner should hold most of it back until you agree, and a tag manager can load more that we don’t see.

1. 01
   DataCite datacite.org English No trackers

   DataCite – Connecting Research, Advancing Knowledge - DataCite

   international not-for-profit organization which aims to improve data citation

   • Bootstrap
   • cdnjs
   • Font Awesome
   • Google Workspace
   • jQuery
   • jsDelivr

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2. 02
   ORCID orcid.org Top 10K English No trackers

   ORCID

   non-profit organization that issues ORCID Identifiers

   • Amazon Web Services
   • Google Workspace
   • Microsoft 365
   • Zendesk
   • Apple Business
   • Cloudflare

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3. 03
   DOI.org query endpoint doi.org Top 1K English No trackers

   Home Page

   API endpoint

   • Amazon SES
   • Bootstrap
   • Amazon CloudFront
   • Font Awesome
   • jQuery
   • jsDelivr

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4. 04
   OpenAlex openalex.org English No trackers

   OpenAlex: The open catalog to the global research system

   OpenAlex indexes half a billion scholarly works, with their authors, institutions, sources and topics, and makes them free to search, analyze and reuse through our web app, API and bulk download.

   • Google Workspace
   • Zendesk
   • Cloudflare
   • Cloudflare DNS
   • Google Fonts
   • Google Search Console

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5. 05
   Handle System handle.net Top 10K No trackers

   Handle.Net Registry

   Handle.Net Registry is a DONA MPA.

   • Amazon SES
   • Cloudflare
   • Cloudflare DNS

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6. 06
   OSF osf.io Top 10K English 1 tracker

   OSF

   tools that make open science practice easier

   • Google Cloud DNS
   • Google Search Console
   • Mailchimp
   • Mailgun
   • Mailchimp Transactional

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7. 07
   PLOS plos.org Top 10K English 2 trackers

   Leading the future of open science publishing - PLOS

   Discover how we are transforming scholarly publishing with a mission-driven commitment to open science, research integrity, and innovation that benefits researchers, institutions, and society worldwide.

   • jQuery
   • Microsoft 365
   • Apple Business
   • Atlassian
   • Cloudflare
   • Cloudflare DNS

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8. 08
   pir.org English 3 trackers

   .ORG - Power Your Inspiration. Connect Your World.

   For diverse global communities & individuals who want to do great things online, .ORG is purpose-driven to empower & connect those who inspire the world.

   • cdnjs
   • jQuery
   • jsDelivr
   • Microsoft 365
   • Atlassian
   • Canva

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9. 09
   ICANN icann.org Top 10K English No trackers

   Internet Corporation for Assigned Names and Numbers (ICANN)

   ICANN’s mission is to help ensure a stable, secure, and unified global Internet.

   • Angular
   • AngularJS
   • Atlassian
   • Cloudflare
   • Cloudflare Web Analytics
   • Google Search Console

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10. 10
    AAAS aaas.org English 2 trackers

    AAAS Home | American Association for the Advancement of Science (AAAS)

    international non-profit organization promoting science

    • Amazon SES
    • cdnjs
    • jQuery
    • Microsoft 365
    • Adobe Experience Platform Tags
    • Apple Business

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11. 11
    MLCommons mlcommons.org English 2 trackers

    MLCommons - Standardize AI Measurement, Enable Informed Decisions

    MLCommons develops and operates industrial-quality AI benchmarks with industry and academia - measuring quality, performance, safety, and cost so the market can make informed AI decisions.

    • Google Workspace
    • jQuery
    • Cloudflare
    • Freshworks
    • Google Analytics
    • Google Fonts

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12. 12
    Internet2 internet2.edu English 3 trackers

    Home - Internet2

    Internet2 offers a secure high-speed network, cloud solutions, and services to help your organization succeed.

    • jQuery
    • jsDelivr
    • Microsoft 365
    • Apple Business
    • Cloudflare DNS
    • Google Analytics

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13. 13
    SINTEF sintef.no English 1 tracker

    SINTEF - Applied research, technology and innovation

    SINTEF is one of Europe's largest independent research organisations. Every year we carry out several thousand projects for customers large and small.

    • Microsoft 365
    • Adobe
    • Cloudflare
    • Google Search Console
    • Google Tag Manager
    • PHP

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14. 14
    MariaDB mariadb.org Top 10K English 1 tracker

    MariaDB Foundation - MariaDB.org

    database management system, relational, open source, community developed fork of MySQL

    • Google Workspace
    • jQuery
    • Brevo
    • Cloudflare DNS
    • Google Analytics
    • Google Search Console

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15. 15
    datadryad.org English 1 tracker

    Dryad | Publish and preserve your data

    American nonprofit organization; oversees Dryad Digital Repository

    • Amazon SES
    • Amazon Web Services
    • Google Workspace
    • Amazon Route 53
    • Apache HTTP Server
    • Google Analytics

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16. 16
    inria.fr Top 10K English No trackers

    Making sure you're not a bot!

    French research institution in computer science

    • Apple Business

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17. 17
    Afnic afnic.fr English 1 tracker

    Afnic, Internet domain name registry solution Home - Afnic

    Afnic is the Internet registry for .fr (France), .re (Ile de la Réunion), .pm (Saint-Pierre et Miquelon), .yt (Mayotte), .wf and .tf domain names.

    • Bootstrap
    • Font Awesome
    • jQuery
    • Matomo
    • Apache HTTP Server
    • Google Search Console

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18. 18
    Global Biodiversity Information Facility gbif.org

    aggregator of scientific data on biodiversity; data portal

    • Microsoft 365
    • Amazon Route 53
    • Cloudflare
    • Cloudflare Web Analytics
    • Google Search Console
    • Mailchimp

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19. 19
    NSF nsf.gov Top 10K English 1 tracker

    NSF - U.S. National Science Foundation

    NSF is an independent federal agency that supports science and engineering in all 50 states and U.S. territories.

    • Amazon SES
    • Amazon CloudFront
    • jQuery
    • jsDelivr
    • Microsoft 365
    • Adobe

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20. 20
    OCLC oclc.org Top 10K English No trackers

    global library cooperative

    • Microsoft 365
    • Apple Business
    • Canva
    • Cloudflare
    • Google Search Console
    • Meta Business Suite

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Closest first, by how much each site’s offer resembles Crossref’s. Trackers are counted the same way as above. Highlighted technologies are ones Crossref uses too. Votes and comments come from visitors and don’t change the order.

04 · History

No changes yet. Each new crawl is compared with the last one, and what Crossref adds, drops or rewrites shows up here.

05 · Details

How we measure

Alternatives are matched by what sites actually offer, from their homepages, Wikidata and a summary by Claude, in any language. Trackers and the rest of the stack come from the homepage’s code and DNS records.