Appen

Appen

Data Breach on October 25, 2024
Data Breach Report
Victimappen.com
Threat ActorAPT73
Date DiscoveredOct 25, 2024
DescriptionAppen specializes in data for artificial intelligence (AI) and machine learning, providing high-quality training data to enhance machine learning models.
Leak SizeUnknown

Credential Exposure for appen.com

We've indexed 9,304 @appen.com accounts from external breaches, plus 189,987 credentials for appen.com itself.

Last checked Aug 16, 2026

@appen.com addresses from external breaches
Combo lists8,119 accounts · most recent Aug 15, 2026
Third-party breaches1,220 accounts · across 75 breaches · 1,136 with a plaintext password · most recent Mar 22, 2026
Passwords for appen.com accounts
Combo lists108,686 logins · most recent Aug 15, 2026
Infostealer logs86,584 logins · 57,556 infected devices · most recent Aug 8, 2026

Logins may belong to customers or to staff, and the data doesn't say which. None of this is necessarily connected to the ransomware attack above.

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