If you’re impacted by the security incident, you’ll hear directly from the brand with an email from Substack's CEO.

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

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 on Thursday announced the launch of its Creator Accelerator Fund, which provides a $20 million funding guarantee aimed at helping creators grow their audience and move their paid subscribers ...

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

Twitter’s decision to prohibit likes, tweets, and retweets on tweets with Substack URLs seems to fly in the face of owner Elon Musk’s vocal support of free speech on the platform. Twitter’s decision ...

The report says that one of the newsletters — NatSocToday — with 2,800 subscribers, features a swastika as its profile ...