According to The Guardian, several newsletters promoting Nazi ideology and antisemitic conspiracy theories were operating on the platform under paid subscription models.

It was easy to view Substack's 2023 Nazi controversy as a kicked can that could turn up again. Well, white supremacist content led to another headache for the company this week. User Mag reported on ...

Substack has removed several publications for inciting violence, the newsletter publisher said in a statement shared with CNN Tuesday, as writers from across the platform threaten ed to quit over the ...

We keep an eye out for the most interesting stories about Labby subjects: digital media, startups, the web, journalism, strategy, and more. Here’s some of what we’ve seen lately.

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

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