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

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 is opening up to more users with its recent announcement that anyone can now publish content on its platform without setting up a publication. With the change, Substack is likely looking to ...