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.

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

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

Posts from this topic will be added to your daily email digest and your homepage feed. Substack’s founders responded to the change by calling it “a reminder of why writers deserve a model that puts ...

The new daily dispatch can be found at billboard.substack.com. By Xander Zellner Subscribe to our brand-new Substack channel all about the Billboard charts — a must-read for music fans, industry ...

WordPress.com is taking on Substack and others with today’s news that its Newsletter product will now support paid subscriptions and premium content. First launched in December, WordPress.com ...