Data breaches in 2021
64 known data breaches are dated 2021, together exposing around 692 million accounts — the biggest being Twitter (200M). Browse them below to see what was leaked, or check your own email in seconds.
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Were you caught up in a 2021 breach?
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2021 data breaches, answered
How many data breaches were there in 2021?
We track 64 known, verified data breaches dated 2021, together exposing around 692 million accounts. The largest was Twitter (200M) (212 million accounts).
Was my email exposed in a 2021 breach?
Check your email free against known breach and dark-web databases — it tells you which breaches, including any from 2021, include your address and what was exposed.