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- Auburn University - Supporting
- BSZ (Konstanz) - Supporting
- BVB (Munich) - Supporting
- CU Boulder - Empowering
- Cornell University - Sustaining
- Darmstadt University Library - Supporting
- Duke University - Supporting
- EBSCO Information Services - Enableing
- EPAM - Contributing
- FAU University Library Nuremberg-Erlangen - Supporting
- Fenway Libraries Organization (FLO) - Contributing
- Five Colleges Inc - Supporting
- Frankfurt University Library - Supporting
- GBV (Goettingen) - Empowering
- Giessen University Library - Supporting
- Grand Valley State University - Contributing
- Hangzhou metadata co.ltd - Supporting
- HBZ (Cologne) - Empowering
- HeBIS (Frankfurt/Main) - Supporting
- Index Data - Supporting
- Kassel University Library - Supporting
- Knowledge Integration - Supporting
- LMU Munich - Supporting
- Lehigh University - Sustaining
- Leipzig University Library - Sustaining
- Mainz University Library - Supporting
- Marburg University Library - Supporting
- Michigan State - Supporting
- Missouri State University - Supporting
- Shanghai Library - Supporting
- JIANGSU JIATU NETWORK TECHONOLOGY CO.,LTD. - Supporting
- Regensburg University Library - Supporting
- Saxon State and University Library Dresden - Sustaining
- Shanghai Jiao Tong University Library - Supporting
Shanghai RFID Intelligence Digital Technology Co.,LTD. - Supporting
ShenZhen Ketu Automatic New Technology Company - Supporting
Hangzhou metadata co.ltd - Supporting
Nanjing Younger Information Technology Co. ,Ltd - Supporting
- Spokane Public Library - Supporting
- Stanford University - Empowering
- Texas A&M University - Sustaining
- TUM Technical University Library Munich - Supporting
- University of Alabama - Sustaining
- University of Chicago - Sustaining
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