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.

Exclusive: Site takes a cut of subscriptions to content that promotes far-right ideology, white supremacy and antisemitism ...

The hacker claims to have stolen nearly 700,000 Substack user records, including email addresses and phone numbers.

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

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

The newsletter platform Substack still isn’t turning a profit, even as its writers make millions. The newsletter platform Substack still isn’t turning a profit, even as its writers make millions. is a ...

"We're moving quickly," Farrah Storr, head of international at Substack, tells THR after hiring Mark Swierszcz as its new ...

Forbes contributors publish independent expert analyses and insights. Karin Eldor covers entrepreneurs and leaders in fashion & lifestyle. The momentum hasn’t slowed. Every time I went to hit publish ...

The most popular writers on Substack earn up to seven figures each year primarily by persuading readers to pay for their work. The newsletter platform’s subscription-driven business model offers ...

As TikTok's future in the U.S. remains in limbo, startup Substack is going after video creators in a move to expand its platform. The San Francisco startup on Thursday announced that creators can now ...

The “High Maintenance” co-creator and star Ben Sinclair delves into his complicated relationship with marijuana in a new Substack called “Low Maintenance.” ...