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

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

Lynch Carpenter is a national class action law firm with offices in Pennsylvania, California, and Illinois. Our firm has represented millions of clients in data privacy matters for more than a decade ...

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

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

Newsletter platform Substack has confirmed it suffered a security incident, leading to the compromise of users’ email addresses and phone numbers. Chris Best, the CEO of Substack, notified users of ...

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 ...

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 ...

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 ...