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

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

Substack won't share official numbers, but it seems like a pretty significant data breach.

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 move comes as Substack has been investing more heavily in video and livestreaming, as it looks to compete with platforms like YouTube and Patreon for both creators and viewers.

Substack, which was founded as a newsletter platform, is trying to make itself an alternative to Twitter by adding social features to its publishing site. On Nov. 3, the platform launched a chat ...

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 ...

Publishing platform Substack is making money from newsletters that promote far-right ideologies and antisemitism, The ...

Like clockwork, every Wednesday morning, Russ Thornton, an Atlanta-based advisor who specializes in helping women with retirement planning, publishes a financial newsletter called “Wealthcare for ...

Newsletter platform Substack is pioneering a new media business model that allows readers to subscribe to and pay their favorite writers directly. For writers who worked for legacy and newer ...