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

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

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

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

Your guide to what Trump’s second term means for Washington, business and the world Substack has added more than 1mn subscriptions since Donald Trump’s triumph in the US election last November, as the ...

An iPhone with the Substack app is held in front of bills of money in various currencies. Picture: Photo For Everything/Substack The number of Substack email newsletters earning at least half a ...

Elon Musk wanted to buy Substack not long after he bought Twitter in 2022. But the newsletter and podcast platform wasn’t for sale. This month Substack raised a further $100 million (€85.44 million) ...