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 ...

Forbes contributors publish independent expert analyses and insights. Kristen Bousquet is an influencer and creator monetization coach. Substack is a subscription-based platform that allows writers, ...

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

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) ...

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 ...

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 ...

In 2025, everybody in fashion has a Substack. At least, that’s what it looks like, judging by my increasingly crowded inbox. Has it reached a saturation point? In March, Substack hit five million paid ...