Substack confirms data breach affects users’ email addresses and phone numbers

Substack said that customer data was accessed in October 2025, but wasn't discovered until early February.

Substack Hacked — What 50 Million Users Need To Know

Substack, the hugely popular online content platform with 50 million active subscribers, has confirmed it has been hacked.
SecurityWeek

Substack Discloses Security Incident After Hacker Leaks Data

The hacker claims to have stolen nearly 700,000 Substack user records, including email addresses and phone numbers.
MediaNama

Substack Suffers Data Breach, Users’ Emails And Phone Numbers Compromised

Substack confirms a major data breach exposing user emails and phone numbers. What’s behind the breach, and what’s next?

You can now enjoy Substack on a TV, if that’s your idea of fun times

Substack’s new TV app expands the platform beyond newsletters, offering subscribers an easier way to watch video posts and livestreams on Apple TV and Google TV. The post You can now enjoy Substack on ...
Mashable

Substack failed to register a URL. It allowed me to receive their private emails.

The Wall Street Journal. TechCrunch. Vice. These are just a handful of the media outlets who reached out to me earlier this year for comment in their stories. However, they weren't actually looking ...
SiliconANGLE

Substack releases a platform that looks a whole lot like Twitter

Substack Inc. today launched Notes, a platform where Substack creators can interact with subscribers and where the entire experience looks very much like Twitter. The differences are only in the ...