Substack’s new tool tells you who’s been writing their newsletters with AI
Substack is giving readers a way to estimate how much of a newsletter was written by AI, signaling a broader shift toward transparency around AI-assisted content.
Substack is giving readers a way to estimate how much of a newsletter was written by AI, signaling a broader shift toward transparency around AI-assisted content.
Users will be able use AI to create newsletters based on their recordings.
Substack’s new Reply Rules feature is currently available for all English-language publications and is designed to give creators greater control over how their audiences respond.
One way Beehiiv is convincing creators to switch from rivals like Substack and Patreon is by not taking a cut of revenue.
Substack creators can pre-record video conversations with up to two guests, then publish directly on the platform.
Substack said that customer data was accessed in October 2025, but wasn’t discovered until early February.
The move comes as Substack has been investing more heavily in video and livestreaming, as it looks to compete with platforms like YouTube and Patreon for both creators and viewers.
The New York Times reports that the funding brings Substack’s valuation to $1.1 billion, almost 70% higher than its 2021 valuation of $650 million.
Substack announced new features aimed at helping creators grow and promote their livestreams.