Data Breach Chronology Database - Multi-User, Monthly Access Pass (Updated 2025-06)

Data Breach Chronology v2.1-202506 (Multi-User, Monthly Access Pass)

Updated June 10, 2025 – coverage from 2005 through breaches reported June 6, 2025. 74,440 notifications · 35,832 unique incidents

This is the Data Breach Chronology v2.1-202506, containing information on reported data breaches from 2005 through June 2025. Please see the included readme for a full list of features and more information about the project.

This purchase provides a download key valid for one year, allowing unlimited downloads of your purchased dataseet and internal sharing within your organization during that period. The database may be used internally and integrated into your products, but may not be redistributed in its entirety.

By downloading the Data Breach Chronology Database you agree to our Terms of Service.

FAQs and more information about our pricing can be found here.

What's Included

• Complete database in SQLite format (.db) with full notification letter text
• Excel workbook (.xlsx) and CSV export for simplified access
• Comprehensive documentation

Try Before You Buy

A sample download of the database is available here, including documentation and sample data across all provided formats:

• Download SQLite sample (.db file, recommended)
• Download Excel sample (.xlsx file)
• Download CSV sample (.csv file)

Important: To prevent issues when importing into Excel, the pdf_contents_cleaned field is omitted from both the Excel and CSV exports. Excel has strict limits on characters per cell (32,767 characters); including full text led to frequent issues.

We strongly recommend working with the SQLite (.db) export if you need access to the full text of breach notifications.

Pricing

We offer a significant discount for academics. If you are working on a project aligned with our mission, you may apply for a single download pass fee waiver.

Version 2.1 Update (May 2025)

Version 2.1 enhances the accuracy of our database through updated categorizations for breach types, organization types, information types, and location impacts, using improved AI models. Additionally, we have fully refactored our grouping algorithms, significantly improving how organizations and breach events are tracked over time.

Version 2.0 Highlights (January 2025)

• Coverage expanded to over 70,000 notifications across all 50 states
• Analysis of more than 22,000 digitized notification letters
• Normalized organization names and breach event groupings
• Enhanced classification systems

Detailed Changelog

Please see the included Readme for full details.