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

We keep an eye out for the most interesting stories about Labby subjects: digital media, startups, the web, journalism, strategy, and more. Here’s some of what we’ve seen lately.

The Teamsters, one of the nation’s largest and most diverse unions with 1.3 million members, unveiled a Substack newsletter Monday, becoming the first major union to use the online forum to reach ...

On Wednesday, Substack announced new features that allow writers to embed Polymarket data directly into their newsletters and in Notes. Substack had previously introduced Polymarket embeds in 2024, ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." If you’re not reading Feed Me, do you even know what’s going on? Emily Sundberg bills her influential ...

Newsletter platform Substack is notifying users of a data breach after attackers stole their email addresses and phone numbers in October 2025. Although the incident occurred four months ago, CEO ...

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