Technology Solutions for Collaboration in the Academic Research Community

about us

PSI is an independent third-party, which enables libraries, publishers and membership societies to work together securely and confidentially towards the common goals of facilitating legitimate access to scholarly content, eliminating subscription abuse, eradicating IP misuse, and combating cybercrime. 

PSI is the developer of both and

With  publishers and libraries can save time and streamline processes, eliminate errors, improve the reliability of usage metrics, and ensure the right content is accessible to the right users.


With publishers and libraries can join the community driven fight against cybercrime. Libraries can download the PSI block list from their profile page on The block list has been made available to academic libraries for FREE to help protect the academic community from cybercrime.

PSI is the brainchild of two veterans of the publishing world who hold over 40 years of STM publishing experience.


It was while working for major publishers that they recognised the extent of IP misuse and subscription abuse, the damage it was causing to the community as a whole, and the need to identify a viable means of addressing these issues.


Since then they have recognised the unique position that PSI finds itself in to encourage collaboration, communication and innovation among the various stakeholders of the academic library and publishing world for the benefit of the whole community.


PSI Metrics

Denials, views, downloads, turnaways - choose your metric!

Our Services

Join the publisher community driven fight against hackers, spammers, password crackers, scrapers and phishing attacks. Protect sensitive content from malicious intrusions.

Find out about the PSI block lists here.

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Due Diligence is a legal requirement; all relevant commercial organisations; including publishers and societies, are required to conduct due diligence. PSI's Due Diligence service offers peace of mind for organisations, allowing them to demonstrate compliance and protect their reputation.​

DDB Icon.png is a single repository that contains over 1.5 billion verified IP addresses for over 60,000 content licensing organisations worldwide, accessible by both publishers and libraries and maintained for the benefit of the whole scholarly communication community.


At a time when it’s becoming increasingly crucial for OA publishers to know who is reading their content and where that readership is based, traditional tools for understanding organisational usage are leaving publishers in the dark.

With PSI Metrics: OA Metrics Generator OA publishers and university repositories can develop a deeper understanding of organisational readership. They can generate COUNTER compliant, open access usage statistics.

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Analyse market potential and identify the hottest potential sales leads.

Access a databank of customers subscribing to the content of over 150 of the world’s largest publishers.

PSI's Gap Analysis Tool compares your customer base against the potential market of over 72,000 academic, corporate and government organisations in

PSI Metrics: Denials Reporting is a versatile and powerful reporting service that allows you to interpret the data found within your log files and create useful, actionable information. Our API will enable a more meaningful analysis with details of which organisations are interacting with your content.

PSI Metrics offers accurate and auditable usage metrics, drilled down to the exact organisations that are accessing your content.

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Contact Us


Oxford, UK

+44 (0) 1865 849514

© 2020 by PSI IPV Ltd. 

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Image Acknowledgements:

Photos by: William Bout, 

Maarten Van der Heuvel, 

Joel Felipe

on UnSplash