All Breaches
December 27, 2015 Verified Retail

Trillian Data Breach

The Trillian data breach affected approximately 3,827,238 user records on December 27, 2015. The listed fields are dates of birth, email addresses, IP addresses, names, passwords, and usernames.

3.8 Million
Reported Records
6
Data Types
Critical
Severity
Oct 10, 2026
Last updated

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Exposed Data Types

6
  • Dates of birth
  • Email addresses
  • IP addresses
  • Names
  • Passwords
  • Usernames

About This Breach

Password reuse can lead to unauthorized login attempts on services outside the messaging account. Names, usernames, birth dates, and IP information can be combined with older profiles, while email addresses can support targeted phishing.

A match means that the queried email address or username appears in the dataset; it does not prove a current account takeover. Use unique passwords, review recovery settings and older sessions, and verify unfamiliar messages or login alerts before taking action.

Verification and editorial method

LeakData compares the incident name, date, affected-record count, and exposed data types with accessible sources. Unverified fields are not presented as facts, and records are updated when new evidence becomes available.

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