About Us > Affiliations & Memberships

Affiliations & Memberships

The cultivation and maintenance of relationships with libraries, publishers, and those passionate about digital preservation continues to inform and enhance our services and approach.

  • 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

    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. Portico is a member of Association of American Publishers, including the Professional and Scholarly Publishing division through ITHAKA.
  • ALPSP Logo

    Association of Learned and Professional Society Publishers

    Associate Member

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


    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.
  • DPC Logo

    Digital Preservation Coalition

    Associate Member

    The Digital Preservation Coalition (DPC) 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.
  • NISO logo

    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.
  • Open Preservation Foundation logo

    Open Preservation Foundation

    Affiliate Member

    The Open Preservation Foundation is an international not-for-profit membership organization, which enables collaboration in Technology, Knowledge, and Advocacy and Alliances to support their members in developing their digital preservation practice.
  • SSP Logo

    Society for Scholarly Publishing

    Supporting Member

    The mission of SSP 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 Logo

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


    STM is an international association of about one hundred scientific, technical, medical, and scholarly publishers, collectively responsible for more than 60% 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.
  • UKSG Logo



    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.