We are CLOCKSS. A collaboration of the world’s leading academic publishers and research libraries, CLOCKSS provides a sustainable online archive to ensure the long-term survival of digital scholarly content.

As global leaders in digital preservation services, we ensure that all books, journals, and knowledge entrusted to CLOCKSS will be safe. We preserve the scholarly record so it is protected and accessible for all, preserving the legacy of academic authors indefinitely.

CLOCKSS is the only online archive that assigns Creative Commons Open Access licenses to all triggered publications to ensure they always remain open and available to everyone.

At CLOCKSS, through the services we provide to libraries and publishers, built over LOCKSS software and delivered as part of the broader LOCKSS community, we instill confidence in authors, scholars, policy makers, libraries and publishers around the world that their content will be safely and securely preserved for future generations.

Find out how you can become part of the CLOCKSS community.

Join CLOCKSS

DIGITAL PRESERVATION BY NUMBERS

51 Million Journal Articles

400,000 Books

66 Triggered Titles Open Access

12 Mirror Repository Sites

300 Supporting Libraries

491 Participating Publishers

CLOCKSS works in partnership with libraries, publishers, and other key stakeholders to mitigate potential issues and risks, to seek future-proofing solutions, and to reduce stress or concerns for members of the scholarly community. Find out more about the CLOCKSS community

DELIVERING WORLD CLASS DIGITAL PRESERVATION SERVICES

Sustainable Long-term Digital

CLOCKSS provides a sustainable online archive to ensure the long-term survival of digital scholarship. Digital content is preserved in the CLOCKSS archive with no user access unless a “trigger” event occurs.

Worldwide Collaboration

CLOCKSS preserves content in 12 archive nodes located at leading research libraries around the world, preserving the authoritative versions of nearly 50 million journal articles and 360,000 book titles, and a growing collection of supplementary materials and metadata.

Quality Research Content

The content preserved by CLOCKSS is selected by research libraries and is quality assured by reputable academic publishers.

Innovative Technology and Services

CLOCKSS uses award-winning LOCKSS technology to preserve content. CLOCKSS preserves scholarly content in original digital formats and migrates this content to new formats to ensure it remains usable. CLOCKSS safeguards scholarship against the long-term,well-documented causes of digital loss: human error, computer attacks, economic and organizational failure. In an ever-changing world we remain future oriented and proactive in our approach to deliver a cutting-edge service and provide leadership in long-term digital preservation.

Permanent Open Access

CLOCKSS assigns Creative Commons Open Access licenses to all triggered publications to ensure they are open and available to everyone.

Find out more about CLOCKSS and why world leading research libraries and academic publishers trust us.

WORKING WITH CLOCKSS

Sustainable organization governed by its Board
CLOCKSS is a collaboration between the world's leading research libraries and academic publishers. CLOCKSS is a financially secure, independent non-profit 501(c)(3) organization, governed by its Board of libraries and publishers.

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CLOCKSS is a tax-exempt, 501(c)(3), not-for-profit organization, governed by a Board of Directors made up of librarians and publishers.