Largest Data Breaches of All Time
Source:
Wikipedia, List of data breaches
Key Findings
🏆
WhatsApp (2025) leads in Records Exposed with 3,587,788,782 in 2026.
📊
Average Records Exposed in 2026: 1,372,250,256 · median: 791,000,000.
↔️
Gap in 2026: WhatsApp (2025) is 8.7× larger than Friend Finder Network (2016).
About This Dataset
Largest Data Breaches of All Time
Security incidents ranked by the number of records exposed, as reported at the time. A record is not a person: one breach can hold several rows for the same customer, and companies have an obvious incentive to report the smallest defensible figure, so these counts are floors rather than measurements.
Analysis
WhatsApp tops the list with 3,587,788,782 records exposed in 2025, 1.20 times the 3,000,000,000 of Yahoo. The 12 incidents here exposed 16,467,003,077 records between them. They span 2013 to 2025, and 6 of the 12 are recorded as hacks rather than accidental exposure. The smallest breach on this chart still exposed 412,214,295 records.
Data Insights
Numbers, trends & sources behind this chart
Methodology & source
- Data source
- Wikipedia, List of data breaches
- Coverage
- 12 entities · 2026 · 12 observations
- Measure
- Records Exposed
- Last updated
- 7 September 2026
- Compiled by
- The ANYSTAT team, from the source above
How the figures are calculated
- Values use the measure and unit named on this page. Consult the dataset description and cited source for coverage, definitions and any unit conversions. Displayed values may be rounded for readability.
- Entities are ranked highest-first on their value in 2026.
Data Sources & References
All external sources cited in this dataset
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