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

Newsletter platform Substack lured prominent journalists and writers by pushing a subscription model that allowed them to directly connect with readers who pay them. "Our decision to focus on ...

The digital publishing platform Substack has told some of its users that their data was stolen in a security breach. The affected account holders had their email addresses and phone numbers scraped in ...

Substack states that the security flaw has now been fixed and that a full investigation is underway. There are currently no ...

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

Add Yahoo as a preferred source to see more of our stories on Google. Dominic Lipinski/PA Wire I didn’t go looking for a fight with Britain’s Online Safety Act. But as the CEO of Substack – an online ...

AI could flood feeds with slop or give creators "more creative leverage," said Substack CEO. The CEO of the newsletter platform said attention is the real scarcity in the media landscape. AI-generated ...

On the heels of Instagram rolling out a Reels app for connected TV, newsletter creators can now offer videos and livestreams to subscribers via Apple TV and Google TV. By Etan Vlessing Canada Bureau ...

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

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.

Substack has a Nazi problem — but they’re not planning to do anything about it, according to co-founder Hamish McKenzie. In response, McKenzie posted a note on the platform Thursday that made it clear ...