The biggest data breaches of all time
The largest known breaches by number of accounts affected, drawn from the 1000 incidents tracked here.
- 1Synthient Credential Stuffing Threat Data20251,957,476,021
- 2Collection #12019772,904,991
- 3Verifications.io2019763,117,241
- 4Onliner Spambot2017711,477,622
- 5Data Enrichment Exposure From PDL Customer2019622,161,052
- 6Exploit.In2016593,427,119
- 7Facebook2019509,458,528
- 8Anti Public Combo List2016457,962,538
- 9River City Media Spam List2017393,430,309
- 10Combolists Posted to Telegram2024361,468,099
- 11MySpace2008359,420,698
- 12ALIEN TXTBASE Stealer Logs2025284,132,969
- 13Not SOCRadar2024282,478,425
- 14Wattpad2020268,765,495
- 15NetEase2015234,842,089
- 16Deezer2019229,037,936
- 17Cit0day2020226,883,414
- 18Twitter (200M)2021211,524,284
- 19Synthient Stealer Log Threat Data2025182,962,095
- 20Zynga2019172,869,660
- 21Adult FriendFinder (2016)2016169,746,810
- 22LinkedIn2012164,611,595
- 23Dubsmash2018161,749,950
- 24MyFitnessPal2018143,606,147
- 25Canva2019137,272,116
- 26National Public Data2024133,957,569
- 27Exactis2018131,577,763
- 28Apollo2018125,929,660
- 29LinkedIn Scraped Data (2021)2021125,698,496
- 30DemandScience by Pure Incubation2024121,796,165
- 31Gravatar2020113,990,759
- 32Badoo2013112,005,531
- 33Pemiblanc2018110,964,206
- 34Data Troll Stealer Logs2025109,532,219
- 35B2B USA Businesses2017105,059,554
- 36Evite2013100,985,047
- 371win202496,166,543
- 38VK201293,338,602
- 39MyHeritage201791,991,358
- 40Youku201691,890,110
- 41Rambler201491,436,280
- 42Dailymotion201685,176,234
- 432,844 Separate Data Breaches201880,115,532
- 44Advance Auto Parts202479,243,727
- 45JD201377,449,341
- 46Nitro202077,159,696
- 47Luxottica202177,093,812
- 48Under Armour202572,742,892
- 49Tokopedia202071,443,698
- 50Stealer Logs, Jan 2025202571,039,833