Publishing platform Substack and prediction market Polymarket announced a new partnership on Wednesday. The new partnership ...

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

The 43rd president of the United States launched a Substack site Feb. 16 with a 1,500-word tribute to a predecessor.

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

Journalism is better when it’s backed by live markets,” Polymarket’s X account said in a post announcing the deal.

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

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

The popular online SF universe from top creators Jonathan Hickman, Nick Spencer, Mike Del Mundo and Mike Huddleston will debut in stores this July.

700,000 records isn't the same as 700,000 users: Each record is something like an email address or a phone number, which ...

Substack, the hugely popular online content platform with 50 million active subscribers, has confirmed it has been hacked. Here’s what you need to know.