Twitterでは4月7日ごろから、メルマガ配信サービスSubstackのコンテンツリンクを含むツイートを制限されていると、多数のユーザーが報告した。Substack.comへのリンクのツイートは可能だが、そのツイートをRTまたはいいね！しようとすると「このツイートでは ...

Add Yahoo as a preferred source to see more of our stories on Google. The digital publishing platform Substack has told some of its users that their data was stolen in a security breach. The affected ...

Add Yahoo as a preferred source to see more of our stories on Google. Chris Best, Substack co-founder and CEO, has opened the way for his newsletter platform to join today’s TV wars. “Despite what you ...

Substack has confirmed a significant data breach that exposed user information, but questions remain about the scale of the breach, and why it remained undetected for five months. Digital publishing ...

Beehiiv CEO and co-founder Tyler Denk giving a presentation at a Beehiiv event in London on 12 February 2026. Picture: LRock Media The CEO of Substack rival Beehiiv says the growing platform has a key ...