Substack says hackers accessed user emails, phone numbers, and internal metadata in October 2025, with a database of 697,313 records later posted online.

Substack data breach exposed user email addresses and phone numbers for months before CEO Chris Best confirmed the October ...

Substack, the hugely popular online content platform with 50 million active subscribers, has confirmed it has been hacked. Here’s what you need to know.

According to The Guardian, several newsletters promoting Nazi ideology and antisemitic conspiracy theories were operating on ...

It seems fair to say Substack is having a moment. What started as a simple newsletter platform is becoming something of a cultural juggernaut, with journalists, presenters and influencers alike ...

Michael Burry of "The Big Short" fame started a group chat for all of his paid subscribers on Substack, and the jokes and memes are rolling in.

Some Substack creators are using direct messaging to build communities and retain paying subscribers. The publishing platform has rolled out chat features to help creators connect with their audience.

Newsletter platform Substack is introducing the ability for writers to send videos to their subscribers via Chat, its private community feature, the company announced on Wednesday. The rollout of ...