Digital preservation of scholarly literature is a global need and responsibility requiring involvement, expertise, and cooperation of many individuals and organizations. We are deeply engaged with the digital preservation community to ensure we contribute to, share, and learn from the efforts of others.

Alliance for Permanent Access
Liaison Member

The Alliance is working towards permanent access to the records of science. The Alliance’s international membership includes strategic partners from the research community, libraries, publishers, and digital preservation organizations.

Association of American Publishers
Member (as ITHAKA)

The Association of American Publishers represents the nation’s major commercial, educational and professional publishing houses, as well as scholarly societies, university presses, and smaller and non-profit publishers. As part of ITHAKA, Portico is also a member of the Association’s Professional and Scholarly Publishing division.

Association of Learned and Professional Society Publishers
Associate Member

The Association of Learned and Professional Society Publishers is the international trade association for not-for-profit publishers and those who work with them.

Full Member

CrossRef is a not-for-profit membership association whose mission is to enable easy identification and use of trustworthy electronic content by promoting the cooperative development and application of a sustainable infrastructure.

Digital Preservation Coalition
Associate Member

The Digital Preservation Coalition is a not-for-profit membership organization whose primary objective is to raise awareness of the importance of the preservation of digital material and the attendant strategic, cultural, and technological issues. Its vision is to make our digital memory accessible tomorrow.

JSTOR/Harvard Object Validation Environment (JHOVE2)

With funding from the Library of Congress under its National Digital Information Infrastructure Preservation Program (NDIIPP), the California Digital Library, Portico, and Stanford University collaborated on a two year project to develop and deploy JHOVE2, the next-generation of the JHOVE (JSTOR/Harvard Object Validation Environment) validation tool, providing enhanced performance, streamlined APIs, and significant new features. JHOVE2’s first release was in 2011; Portico continues to work on tool enhancements.

National Information Standards Organization (NISO)
Member (as ITHAKA)

NISO, the National Information Standards Organization, a not-for-profit association accredited by the American National Standards Institute (ANSI), identifies, develops, maintains, and publishes technical standards to manage information in our changing and ever-more digital environment.
Jabin White, Portico’s VP of content management, serves on the NISO Board of Directors; John Meyer, Portico’s director of data technology, serves as a member of the NISO Standardized Markup for Journal Articles Working Group (NLM Tag Set); and Amy Kirchhoff, Portico’s archive service product manager, serves as a member of the NISO Protocol for Exchanging Serial Content working group.

Open Preservation Foundation
Affiliate Member

The Open Preservation Foundation is an international not-for-profit membership organization that enables collaboration in technology, knowledge, and advocacy and alliances to support their members in developing their digital preservation practice.


The Data Conservancy, IEEE, and Portico collaborated to design and prototype a data curation infrastructure that connects published research and associated data sets for the long-term benefit of researchers worldwide. This two-year project, which was supported by a $602,000 grant from the Alfred P. Sloan Foundation, resulted in the development of a service to build, store, update, and retrieve the connections among publications and data, and preserve those connections over the long-term.

Society for Scholarly Publishing
Supporting Member

The mission of the Society for Scholarly Publishing is to advance scholarly publishing and communication and the professional development of its members through education, collaboration, and networking among individuals in the field.

STM – the International Association of Scientific, Technical, and Medical Publishers

STM is an international association of 150 scientific, technical, medical, and scholarly publishers collectively responsible for 66% of the global annual output of research articles, over half the active research journals and the publication of tens of thousands of print and electronic books, reference works, and databases.


With a membership of approximately 500 organizations, a third of them based outside the UK, the UKSG engages a broad cross-section of people concerned with the publication, distribution, and use of e-resources.